Pub Date : 2023-06-28DOI: 10.24057/2071-9388-2022-155
M. Fatima, I. Butt, Muhammad Nasar-u-Minallah, Asad Atta, Gong Cheng
Human health is harmed by air pollution. The objective of this research was to show that air pollution in Pakistan is getting worse and is negatively impacting people’s health. IQ Air and the Institute for Health Metrics and Evaluation provided the data for this descriptive research. Monthly data of PM2.5 μg/m³ from ten different localities across Pakistan are used to show spatial distribution through the geospatial technique of interpolation. The findings show that two third of the country has high PM2.5 concentration, with Lahore as the most polluted city. In Pakistan, solid fuel use has decreased, leading to a decline in associated mortality and morbidity. However, there have been significant increases in PM2.5 and ozone levels, resulting in a rise in the country’s overall health burden caused by air pollution. Furthermore, the number of deaths attributed to air pollution has also increased since 1990. A total of 57% of chronic obstructive pulmonary disease, 40% of lower respiratory infections, 36% of ischemic stroke, 35% of ischemic heart diseases, 32% of lung cancer, 25% of diabetes, and 20% of neonatal outcomes are directly attributed to air pollution in Pakistan. The main contributors to air pollution are population growth, growing motorization, and unsustainable energy usage. The main challenges due to air pollution control and monitoring in Pakistan include a lack of awareness, poor policy creation and implementation, the use of improper fuel, rising energy demands, and an absence of pollution monitoring stations in most cities. Therefore, there is a need for a robust air pollution monitoring system, increased public awareness, and the implementation of clean and sustainable policies to regulate this environmental health issue.
{"title":"Assessment Of Air Pollution And Its Association With Population Health: Geo-Statistical Evidence From Pakistan","authors":"M. Fatima, I. Butt, Muhammad Nasar-u-Minallah, Asad Atta, Gong Cheng","doi":"10.24057/2071-9388-2022-155","DOIUrl":"https://doi.org/10.24057/2071-9388-2022-155","url":null,"abstract":"Human health is harmed by air pollution. The objective of this research was to show that air pollution in Pakistan is getting worse and is negatively impacting people’s health. IQ Air and the Institute for Health Metrics and Evaluation provided the data for this descriptive research. Monthly data of PM2.5 μg/m³ from ten different localities across Pakistan are used to show spatial distribution through the geospatial technique of interpolation. The findings show that two third of the country has high PM2.5 concentration, with Lahore as the most polluted city. In Pakistan, solid fuel use has decreased, leading to a decline in associated mortality and morbidity. However, there have been significant increases in PM2.5 and ozone levels, resulting in a rise in the country’s overall health burden caused by air pollution. Furthermore, the number of deaths attributed to air pollution has also increased since 1990. A total of 57% of chronic obstructive pulmonary disease, 40% of lower respiratory infections, 36% of ischemic stroke, 35% of ischemic heart diseases, 32% of lung cancer, 25% of diabetes, and 20% of neonatal outcomes are directly attributed to air pollution in Pakistan. The main contributors to air pollution are population growth, growing motorization, and unsustainable energy usage. The main challenges due to air pollution control and monitoring in Pakistan include a lack of awareness, poor policy creation and implementation, the use of improper fuel, rising energy demands, and an absence of pollution monitoring stations in most cities. Therefore, there is a need for a robust air pollution monitoring system, increased public awareness, and the implementation of clean and sustainable policies to regulate this environmental health issue. ","PeriodicalId":37517,"journal":{"name":"Geography, Environment, Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46766377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24057/2071-9388-2022-111
N. G. Zhirenko, Van Thinh Nguyen, Juliya A. Kurbatova
Mangrove forests are an important part of tropical coastal ecosystems. Until recently, these forests were intensively exterminated. Currently, the issue of mangrove conservation is being discussed at a number of symposiums due to their significant role in reducing the effects of greenhouse gas emissions. However, there has recently been uncertainty in estimation of CO2 fluxes in mangrove forests due to a lack of field research. The results of studies of photosynthesis at the leaf level in-situ in seedlings of Rhizophora apiculata Blume, 1827 of both natural and artificial origin are presented. The studies were carried out on a mangrove plantation growing in Can Gio Mangrove Biosphere Reserve, which is 50 kilometres from Ho Chi Minh City (South Vietnam). CO2 gas exchange during photosynthesis was measured using a gas analysing system called the LI-6800 (USA). Photosynthetically active radiation (PAR) is the main factor affecting the photosynthesis of the studied seedlings. Artificial seedlings that were grown in open areas had higher productivity and greater photosynthetic rates. It has been determined that the measured photosynthesis are scattered over three clearly marked zones, which correspond to the measurements of photosynthesis made in the pre-noon, noon and afternoon hours. The water reserves used up before noon were not fully replenished in the afternoon by the seedlings. Based on the results obtained, it has been suggested that the main inhibitory factor affecting the photosynthesis of R. apiculata (if PAR is not taken into account) is a violation of the water balance of the leaves.The optimum air temperature for photosynthesis processes in seedlings is (35 ± 2) °C. The intensity of photosynthesis also increases with an increase in the concentration of CO2 in the air. The increases of photosynthesis continue until the concentration of CO2 reaches ~1000 µmol·mol-1 and then do not increase. We associate this circumstance with the maximum possibilities of the photosynthetic apparatus of the leaf of the studied plant. The obtained research results will contribute to a better theoretical understanding of the productivity of plants of this species in the respective ecosystems, and will also allow us to move from photosynthesis at the leaf level to photosynthesis at the planting level. The work’s mathematical models can be used to model changes in R. apiculata photosynthesis from the point of view of climate change.
{"title":"CO2 Exchange Of Seedlings Of Rhizophora Apiculata Bl. In Artificial And Natural Mangrove Forests Of Southern Vietnam","authors":"N. G. Zhirenko, Van Thinh Nguyen, Juliya A. Kurbatova","doi":"10.24057/2071-9388-2022-111","DOIUrl":"https://doi.org/10.24057/2071-9388-2022-111","url":null,"abstract":"Mangrove forests are an important part of tropical coastal ecosystems. Until recently, these forests were intensively exterminated. Currently, the issue of mangrove conservation is being discussed at a number of symposiums due to their significant role in reducing the effects of greenhouse gas emissions. However, there has recently been uncertainty in estimation of CO2 fluxes in mangrove forests due to a lack of field research. The results of studies of photosynthesis at the leaf level in-situ in seedlings of Rhizophora apiculata Blume, 1827 of both natural and artificial origin are presented. The studies were carried out on a mangrove plantation growing in Can Gio Mangrove Biosphere Reserve, which is 50 kilometres from Ho Chi Minh City (South Vietnam). CO2 gas exchange during photosynthesis was measured using a gas analysing system called the LI-6800 (USA). Photosynthetically active radiation (PAR) is the main factor affecting the photosynthesis of the studied seedlings. Artificial seedlings that were grown in open areas had higher productivity and greater photosynthetic rates. It has been determined that the measured photosynthesis are scattered over three clearly marked zones, which correspond to the measurements of photosynthesis made in the pre-noon, noon and afternoon hours. The water reserves used up before noon were not fully replenished in the afternoon by the seedlings. Based on the results obtained, it has been suggested that the main inhibitory factor affecting the photosynthesis of R. apiculata (if PAR is not taken into account) is a violation of the water balance of the leaves.The optimum air temperature for photosynthesis processes in seedlings is (35 ± 2) °C. The intensity of photosynthesis also increases with an increase in the concentration of CO2 in the air. The increases of photosynthesis continue until the concentration of CO2 reaches ~1000 µmol·mol-1 and then do not increase. We associate this circumstance with the maximum possibilities of the photosynthetic apparatus of the leaf of the studied plant. The obtained research results will contribute to a better theoretical understanding of the productivity of plants of this species in the respective ecosystems, and will also allow us to move from photosynthesis at the leaf level to photosynthesis at the planting level. The work’s mathematical models can be used to model changes in R. apiculata photosynthesis from the point of view of climate change.","PeriodicalId":37517,"journal":{"name":"Geography, Environment, Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68972726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24057/2071-9388-2022-022
Friedrich Seidl, Markus Reisenbüchler, P. Rutschmann, L. Yanygina, M. Schletterer
During the industrialization in Europe, rivers were straightened and designed to fit human activities, thus nowadays only a few natural river systems remain as reference conditions as well as guiding principles for river restoration projects. Therefore, the natural state of some river types is often described using historic records and maps. This study aims to analyze the key characteristics of a pristine proglacial river Katun in the Altai mountains and contribute to the knowledge about reference conditions. For this purpose, hydromorphological characteristics like slope, sinuosity and river width of the river Katun were analysed and summarized using different GIS techniques. Additionally, pebble counts were carried out to assess the changing sediment composition along the longitudinal continuum. Combined with River Habitat Surveys and a one-dimensional flow simulation using HEC-RAS it was possible to give a holistic overview of the dynamic fluvial system Katun in its upper, middle and lower reaches. The results confirmed the relationship between the river and its surrounding topography as they clearly show the lateral development of the Katun. As shown for the individual parameters (e.g., slope, width, depth, flow velocity, shear stress), they influence each other and are strongly dependent and characteristic for each river section. In the context of revitalisation of straightened and / or channelized river courses, it is important to focus on the processes of this interaction and provide suitable space for lateral expansion. The study can be seen as a recommendation on how to analyse hydromorphological characteristics of fluvial systems as well as to establish guiding principles in river restoration using remote sensing.
{"title":"Large-Scale Hydromorphological Characteristics Of The Proglacial River Katun (Ob Headwaters)","authors":"Friedrich Seidl, Markus Reisenbüchler, P. Rutschmann, L. Yanygina, M. Schletterer","doi":"10.24057/2071-9388-2022-022","DOIUrl":"https://doi.org/10.24057/2071-9388-2022-022","url":null,"abstract":"During the industrialization in Europe, rivers were straightened and designed to fit human activities, thus nowadays only a few natural river systems remain as reference conditions as well as guiding principles for river restoration projects. Therefore, the natural state of some river types is often described using historic records and maps. This study aims to analyze the key characteristics of a pristine proglacial river Katun in the Altai mountains and contribute to the knowledge about reference conditions. For this purpose, hydromorphological characteristics like slope, sinuosity and river width of the river Katun were analysed and summarized using different GIS techniques. Additionally, pebble counts were carried out to assess the changing sediment composition along the longitudinal continuum. Combined with River Habitat Surveys and a one-dimensional flow simulation using HEC-RAS it was possible to give a holistic overview of the dynamic fluvial system Katun in its upper, middle and lower reaches. The results confirmed the relationship between the river and its surrounding topography as they clearly show the lateral development of the Katun. As shown for the individual parameters (e.g., slope, width, depth, flow velocity, shear stress), they influence each other and are strongly dependent and characteristic for each river section. In the context of revitalisation of straightened and / or channelized river courses, it is important to focus on the processes of this interaction and provide suitable space for lateral expansion. The study can be seen as a recommendation on how to analyse hydromorphological characteristics of fluvial systems as well as to establish guiding principles in river restoration using remote sensing.","PeriodicalId":37517,"journal":{"name":"Geography, Environment, Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44528259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24057/2071-9388-2022-156
A. Jalil, A. Wirasatriya, Abdul Malik, F. Ramdani, Puji Rahmadi, G. Harsono, R. Setiawan
The term “warm pool” refers to a body of water with the characteristic of SST exceeding 28°C within a particular area and a relatively long period in an annual circle. However, there are regions with an annual mean SST measured above 30°C, and we classified them as hot pools because of the conditions of intense solar radiation and low wind speed. One of the Hot Pool spots was found in Indonesia, in Cenderawasih Bay. The present study examines the existence of the Cenderawasih Hot Pool using long-term observation of satellite SST data. In order to learn more about their mechanisms, we also analyzed surface wind, surface heat flux, and surface current data. The results show that SSTs in Cenderawasih Bay have a 50% chance of exceeding 30°C within the 13 years of study (2013-2015). Heat input comes from strong solar radiation, i.e., 50% of solar radiation is more than 200 W/m2. The location is also dominated by low wind speed, i.e., 80% wind speed of lower than 4 m/s, which caused the low latent loss in Cenderawasih Bay. Cenderawasih Bay is fully separated from surface currents during the dry and wet seasons since the easterly subsurface water flow does not enter the bay. The absence of strong currents prevents the mixing process, maintaining the high temperature in the surface layer. Those processes are discovered and they serve as compelling evidence to support Cenderawasih Bay as one of the Hot Pool areas within the Indonesian seas.
{"title":"Cenderawasih Hot Pool: The Frequent High Sea Surface Temperature Phenomena At Cenderawasih Bay, Papua","authors":"A. Jalil, A. Wirasatriya, Abdul Malik, F. Ramdani, Puji Rahmadi, G. Harsono, R. Setiawan","doi":"10.24057/2071-9388-2022-156","DOIUrl":"https://doi.org/10.24057/2071-9388-2022-156","url":null,"abstract":"The term “warm pool” refers to a body of water with the characteristic of SST exceeding 28°C within a particular area and a relatively long period in an annual circle. However, there are regions with an annual mean SST measured above 30°C, and we classified them as hot pools because of the conditions of intense solar radiation and low wind speed. One of the Hot Pool spots was found in Indonesia, in Cenderawasih Bay. The present study examines the existence of the Cenderawasih Hot Pool using long-term observation of satellite SST data. In order to learn more about their mechanisms, we also analyzed surface wind, surface heat flux, and surface current data. The results show that SSTs in Cenderawasih Bay have a 50% chance of exceeding 30°C within the 13 years of study (2013-2015). Heat input comes from strong solar radiation, i.e., 50% of solar radiation is more than 200 W/m2. The location is also dominated by low wind speed, i.e., 80% wind speed of lower than 4 m/s, which caused the low latent loss in Cenderawasih Bay. Cenderawasih Bay is fully separated from surface currents during the dry and wet seasons since the easterly subsurface water flow does not enter the bay. The absence of strong currents prevents the mixing process, maintaining the high temperature in the surface layer. Those processes are discovered and they serve as compelling evidence to support Cenderawasih Bay as one of the Hot Pool areas within the Indonesian seas.","PeriodicalId":37517,"journal":{"name":"Geography, Environment, Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46856012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24057/2071-9388-2022-140
Alexandra Kamygina, Yulia Tabunova, N. Afanasyeva, N. Poddubnaya
The article presents data on the composition and seasonal dynamics of airborne pollen in Cherepovets and Vologda. The study was carried out from April 10 to September 30, 2014 and from April 16 to August 31, 2015 in Cherepovets, and from June 3 to September 30, 2019 in Vologda. Pollen data were obtained from the Durham gravimetric samplers. Samples were collected daily. Twenty-one types of pollen have been identified, ten of which are the most common allergenic types (Alnus, Artemisia, Betula, Fraxinus, Salix, Plantago, Poaceae, Quercus, Rumex, Urtica), which account for more than 50% of all pollen that has been registered. The article contains pollen calendars showing two peaks of pollen grain quantity: spring (from last decade of April to May), summer (from the end of June to the middle of July). Betula (30%) and Asteraceae (28%) pollen dominate in the pollen spectrum. Pinus (20%), Plantago (6%) and Poaceae (5%) also play an important role in the regional spectrum. The results show the presence of allergenic pollen from different taxa throughout the study. The proportion of damaged pollen grains is approximately 2%, which corresponds to the norm in natural population in normal condition. This data can become the basis for developing recommendations for reducing the level of pollinosis in the Vologda Region.
{"title":"Aeropalynological Profile Of Cherepovets And Vologda, The Cities Of Vologda Region, Nw Russia","authors":"Alexandra Kamygina, Yulia Tabunova, N. Afanasyeva, N. Poddubnaya","doi":"10.24057/2071-9388-2022-140","DOIUrl":"https://doi.org/10.24057/2071-9388-2022-140","url":null,"abstract":"The article presents data on the composition and seasonal dynamics of airborne pollen in Cherepovets and Vologda. The study was carried out from April 10 to September 30, 2014 and from April 16 to August 31, 2015 in Cherepovets, and from June 3 to September 30, 2019 in Vologda. Pollen data were obtained from the Durham gravimetric samplers. Samples were collected daily. Twenty-one types of pollen have been identified, ten of which are the most common allergenic types (Alnus, Artemisia, Betula, Fraxinus, Salix, Plantago, Poaceae, Quercus, Rumex, Urtica), which account for more than 50% of all pollen that has been registered. The article contains pollen calendars showing two peaks of pollen grain quantity: spring (from last decade of April to May), summer (from the end of June to the middle of July). Betula (30%) and Asteraceae (28%) pollen dominate in the pollen spectrum. Pinus (20%), Plantago (6%) and Poaceae (5%) also play an important role in the regional spectrum. The results show the presence of allergenic pollen from different taxa throughout the study. The proportion of damaged pollen grains is approximately 2%, which corresponds to the norm in natural population in normal condition. This data can become the basis for developing recommendations for reducing the level of pollinosis in the Vologda Region.","PeriodicalId":37517,"journal":{"name":"Geography, Environment, Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47747606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24057/2071-9388-2022-115
Juan David Méndez-Quintero, Charles Oliveira Fonseca Mail, M. Nero, Carlos Fernando Ferreira Lobo, S. Ribeiro
Agrotourism is one of the main economic activities in the municipality of Venda Nova do Imigrante, located in the state of Espírito Santo, Brazil. The objective of this research was to analyse the landscape changes generated by this economic activity. The methodology’s development through a stratified random selection, the thematic quality of the maps from the MAPBIOMAS platform was assessed. A confusion matrix was produced, and the kappa coefficient was calculated. Landscape metrics, Volunteered Geographic Information (VGI) from Instagram and Flickr Social Networks, satellite images and free Brazilian databases were used, along with the use of open source GIS software to analyse changes use and cover of land in the municipality generated over a period of 30 years and its relationship with agrotourism. In the results, it was obtained that the thematic quality of maps from the MAPBIOMAS platform was acceptable, the analysis of VGI in social networks was identified agrotourism farms located mainly in the south-east area of Venda Nova do Imigrante, the analysis of changes in land use and cover showed that the city had an increase in urban area around the Federal Highway BR-262 that cuts through the city and rural areas, as well as in the agrotourism farms evaluated, there was an increase in agricultural areas and planted forests.
农业旅游是位于巴西圣埃斯皮里托州的Venda Nova do Imigrante市的主要经济活动之一。本研究的目的是分析这种经济活动所产生的景观变化。该方法通过分层随机选择进行开发，评估了MAPBIOMAS平台地图的主题质量。生成混淆矩阵，并计算kappa系数。使用了景观指标、来自Instagram和Flickr社交网络的志愿地理信息、卫星图像和免费巴西数据库，并使用开源GIS软件来分析30年来该市土地使用和覆盖的变化及其与农业旅游的关系。结果表明，MAPBIOMAS平台地图的主题质量是可以接受的，社交网络中的VGI分析确定了主要位于Venda Nova do Imigrante东南部地区的农业旅游农场，对土地利用和覆盖变化的分析表明，该市穿过城市和农村地区的BR-262联邦公路周围的城市面积有所增加，在评估的农业旅游农场中，农业面积和种植的森林也有所增加。
{"title":"Quantifying Land Use Change Dynamics In Agrotourism Destinations: A Case Study From Venda Nova Do Imigrante, Brazil","authors":"Juan David Méndez-Quintero, Charles Oliveira Fonseca Mail, M. Nero, Carlos Fernando Ferreira Lobo, S. Ribeiro","doi":"10.24057/2071-9388-2022-115","DOIUrl":"https://doi.org/10.24057/2071-9388-2022-115","url":null,"abstract":"Agrotourism is one of the main economic activities in the municipality of Venda Nova do Imigrante, located in the state of Espírito Santo, Brazil. The objective of this research was to analyse the landscape changes generated by this economic activity. The methodology’s development through a stratified random selection, the thematic quality of the maps from the MAPBIOMAS platform was assessed. A confusion matrix was produced, and the kappa coefficient was calculated. Landscape metrics, Volunteered Geographic Information (VGI) from Instagram and Flickr Social Networks, satellite images and free Brazilian databases were used, along with the use of open source GIS software to analyse changes use and cover of land in the municipality generated over a period of 30 years and its relationship with agrotourism. In the results, it was obtained that the thematic quality of maps from the MAPBIOMAS platform was acceptable, the analysis of VGI in social networks was identified agrotourism farms located mainly in the south-east area of Venda Nova do Imigrante, the analysis of changes in land use and cover showed that the city had an increase in urban area around the Federal Highway BR-262 that cuts through the city and rural areas, as well as in the agrotourism farms evaluated, there was an increase in agricultural areas and planted forests. ","PeriodicalId":37517,"journal":{"name":"Geography, Environment, Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47250226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24057/2071-9388-2023-007
Trahel G. Vardanyan
Numerous rivers, lakes and other water features have suffered significant alterations as a result of human economic activity. As a result, hydrometric, hydrological, biological, ecological conditions, as well as morphometric elements of these objects were violated. In this regard, Lake Sevan and its basin might be used as a well-known example. There has never been any instance in the history of limnology where a lake’s level was artificially lowered by 18 meters over 3 to 4 decades (1930–1970), and by another 2 meters at the end of the 20th century (1990–2000). Additionally, the lake’s water volume dropped from 58 billion m3 to 32 billion m3. The Sevan problem first surfaced in the late 19th and early 20th centuries and is still a problem today. However, it has many meanings/soundings at different times. Based on this, we usually divided the entire study period into several stages. It should be noted that the ecosystem has suffered irreparable losses as a result of the use of the Lake Sevan resources, inadequate water resource management, and both positive and negative effects of these factors. We disagree with the assertions of many experts that problems can only be prevented or solved by raising the lake level. Therefore, extensive actions must be taken in the Sevan basin management area, regardless of the lake’s level.
{"title":"Problems Of Sustainable Management Of Water Resources Of Lake Sevan And Its Basin","authors":"Trahel G. Vardanyan","doi":"10.24057/2071-9388-2023-007","DOIUrl":"https://doi.org/10.24057/2071-9388-2023-007","url":null,"abstract":"Numerous rivers, lakes and other water features have suffered significant alterations as a result of human economic activity. As a result, hydrometric, hydrological, biological, ecological conditions, as well as morphometric elements of these objects were violated. In this regard, Lake Sevan and its basin might be used as a well-known example. There has never been any instance in the history of limnology where a lake’s level was artificially lowered by 18 meters over 3 to 4 decades (1930–1970), and by another 2 meters at the end of the 20th century (1990–2000). Additionally, the lake’s water volume dropped from 58 billion m3 to 32 billion m3. The Sevan problem first surfaced in the late 19th and early 20th centuries and is still a problem today. However, it has many meanings/soundings at different times. Based on this, we usually divided the entire study period into several stages. It should be noted that the ecosystem has suffered irreparable losses as a result of the use of the Lake Sevan resources, inadequate water resource management, and both positive and negative effects of these factors. We disagree with the assertions of many experts that problems can only be prevented or solved by raising the lake level. Therefore, extensive actions must be taken in the Sevan basin management area, regardless of the lake’s level.","PeriodicalId":37517,"journal":{"name":"Geography, Environment, Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44553175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24057/2071-9388-2022-136
Mohammad Muhsen, A. Hammad, Mustapha Elhannani
The urban sprawl of cities periphery is one of such changes that has led to drastic land-use changes, which resulted in landscape fragmentation. The objective of this study is to understand the process of landscape fragmentation because of urban expansion; identifying the most influential drivers that have changed the land-use. To achieve the objectives due to changes in land use, a study had conducted in Ramallah area of Palestine. The study utilized Fragstat software to quantify the landscape changes with regard to its pattern and structure through a number of indices, also using Geographic Information System tool to draw up different landscape parcels spatially with its characteristics. The spatial analysis carried out on the land-use change used the 1997 and 2017 aerial photos to quantify the landscape fragmentation, which included a variety of land-uses. Over 52% of the study area underwent noticeable urbanization process, resulting in appreciable landscape changes to the area, especially after 1993. The statistical analysis of the landscape fragmentation revealed significant changes in land-use during the period from 1997 to 2017; the green landscape has been fragmented at a large scale by increasing the number of landscape patches (from 71 to 148 patches). As a result, there was an obvious reduction in agricultural lands, such as olive groves and grassland. At the same time, the urban surface areas increased from 654 patches in 1997 to 2019 patches in 2017. These results indicate that the landscape has become more fragmented due to geopolitical and socio-economic drivers since mid-1995 after Oslo accord.
{"title":"Effect Of Land-Use Changes On Landscape Fragmentation: The Case Of Ramallah Area In Central Palestine","authors":"Mohammad Muhsen, A. Hammad, Mustapha Elhannani","doi":"10.24057/2071-9388-2022-136","DOIUrl":"https://doi.org/10.24057/2071-9388-2022-136","url":null,"abstract":"The urban sprawl of cities periphery is one of such changes that has led to drastic land-use changes, which resulted in landscape fragmentation. The objective of this study is to understand the process of landscape fragmentation because of urban expansion; identifying the most influential drivers that have changed the land-use. To achieve the objectives due to changes in land use, a study had conducted in Ramallah area of Palestine. The study utilized Fragstat software to quantify the landscape changes with regard to its pattern and structure through a number of indices, also using Geographic Information System tool to draw up different landscape parcels spatially with its characteristics. The spatial analysis carried out on the land-use change used the 1997 and 2017 aerial photos to quantify the landscape fragmentation, which included a variety of land-uses. Over 52% of the study area underwent noticeable urbanization process, resulting in appreciable landscape changes to the area, especially after 1993. The statistical analysis of the landscape fragmentation revealed significant changes in land-use during the period from 1997 to 2017; the green landscape has been fragmented at a large scale by increasing the number of landscape patches (from 71 to 148 patches). As a result, there was an obvious reduction in agricultural lands, such as olive groves and grassland. At the same time, the urban surface areas increased from 654 patches in 1997 to 2019 patches in 2017. These results indicate that the landscape has become more fragmented due to geopolitical and socio-economic drivers since mid-1995 after Oslo accord.","PeriodicalId":37517,"journal":{"name":"Geography, Environment, Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46866715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-27DOI: 10.24057/2071-9388-2022-063
Xiaolei Zhao, Shuo Shen, Hai-ying Teng, Shuping Zhang, Ren-chao Wang
. In the context of rapid urbanization, pollution and ecological degradation problems have frequently shown up and influenced environmental sustainability of rural China in the past decades. The rural residents have begun to pay attention to local environment protection, and researchers have been taking public perceptions into regional planning. However, comprehensive studies on the perceptions of villagers on rural environment development still remain less. This research carried out a face-to-face questionnaire investigation of 187 villages and ten residents from each village at a nationwide scale of China. The investigated village committee managers and residents were interviewed by asking the questions including the existing environmental problems, the targets of rural environment development, the ways to achieve these targets and the willingness to pay for pollution control. The results showed that household waste pollution, air pollution and pesticides pollution etc. are top concerned problems. A big proportion (65%) of the interviewed residents chose “environment with good quality for health” as their preferred living environment. While, more than half of the interviewed village managers took “green villages with sustainable agriculture” as their village development targets. And more than 50% of the interviewed residents advocated to increase the forest coverage rate to mitigate the degeneration of rural ecosystem services. As well, most residents strongly support rural green development and are willing to pay for pollution control. Our findings may provide new insights into rural environment development and rural revitalization in the context of rapid urbanization.
{"title":"Perceptions Of Villagers On Environmental Development Of Rural China In The Context Of Rapid Urbanization","authors":"Xiaolei Zhao, Shuo Shen, Hai-ying Teng, Shuping Zhang, Ren-chao Wang","doi":"10.24057/2071-9388-2022-063","DOIUrl":"https://doi.org/10.24057/2071-9388-2022-063","url":null,"abstract":". In the context of rapid urbanization, pollution and ecological degradation problems have frequently shown up and influenced environmental sustainability of rural China in the past decades. The rural residents have begun to pay attention to local environment protection, and researchers have been taking public perceptions into regional planning. However, comprehensive studies on the perceptions of villagers on rural environment development still remain less. This research carried out a face-to-face questionnaire investigation of 187 villages and ten residents from each village at a nationwide scale of China. The investigated village committee managers and residents were interviewed by asking the questions including the existing environmental problems, the targets of rural environment development, the ways to achieve these targets and the willingness to pay for pollution control. The results showed that household waste pollution, air pollution and pesticides pollution etc. are top concerned problems. A big proportion (65%) of the interviewed residents chose “environment with good quality for health” as their preferred living environment. While, more than half of the interviewed village managers took “green villages with sustainable agriculture” as their village development targets. And more than 50% of the interviewed residents advocated to increase the forest coverage rate to mitigate the degeneration of rural ecosystem services. As well, most residents strongly support rural green development and are willing to pay for pollution control. Our findings may provide new insights into rural environment development and rural revitalization in the context of rapid urbanization.","PeriodicalId":37517,"journal":{"name":"Geography, Environment, Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42235392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-27DOI: 10.24057/2071-9388-2022-117
Tien-thanh Nguyen, A. Hoang, Thi-thu-huong Pham, Thi-thu-trang Tran
Flash floods have been blamed for significant losses and destruction all around the world are widely, including Vietnam, a developing nation that has been particularly hard hit by climate change. Therefore, flash flood hazards are essential for reducing flood risks. The topographic wetness index (TWI), altitude, slope, aspect, rainfall, land cover, normalized difference vegetation index (NDVI), distances to rivers and roads, and flow length were used in this study to create a spatial database of ten exploratory factors influencing the occurrence of flash floods in the Ngan Sau and Ngan Pho river basins (North-Central Vietnam). Subsequently, the analytic hierarchy process (AHP) was applied to calculate the weights of these influencing factors. The flood threat was then mapped using GIS techniques. The validation of the flash flood hazards involved 151 flood inventory sites in total. The findings demonstrate that (i) distance from rivers (0.14) and TWI (0.14) factors have the greatest influence on flash flooding, whereas distance from roads (0.06) and NDVI (0.06) factors were found to have the least influence; (ii) a good conformity of 84.8 percent between flood inventory sites and moderate to very high levels of flash flood hazard areas was also discovered; (iii) high and very high flood hazard levels covering areas of 275 and 621.1 km2 were mainly detected along and close to the main rivers and streams, respectively. These results demonstrated the effectiveness of GIS techniques, AHP, and Landsat-8 remote sensing data for flash flood hazard mapping.
{"title":"Flash Flood Hazard Mapping Using Landsat-8 Imagery, Ahp, And Gis In The Ngan Sau And Ngan Pho River Basins, North-Central Vietnam","authors":"Tien-thanh Nguyen, A. Hoang, Thi-thu-huong Pham, Thi-thu-trang Tran","doi":"10.24057/2071-9388-2022-117","DOIUrl":"https://doi.org/10.24057/2071-9388-2022-117","url":null,"abstract":"Flash floods have been blamed for significant losses and destruction all around the world are widely, including Vietnam, a developing nation that has been particularly hard hit by climate change. Therefore, flash flood hazards are essential for reducing flood risks. The topographic wetness index (TWI), altitude, slope, aspect, rainfall, land cover, normalized difference vegetation index (NDVI), distances to rivers and roads, and flow length were used in this study to create a spatial database of ten exploratory factors influencing the occurrence of flash floods in the Ngan Sau and Ngan Pho river basins (North-Central Vietnam). Subsequently, the analytic hierarchy process (AHP) was applied to calculate the weights of these influencing factors. The flood threat was then mapped using GIS techniques. The validation of the flash flood hazards involved 151 flood inventory sites in total. The findings demonstrate that (i) distance from rivers (0.14) and TWI (0.14) factors have the greatest influence on flash flooding, whereas distance from roads (0.06) and NDVI (0.06) factors were found to have the least influence; (ii) a good conformity of 84.8 percent between flood inventory sites and moderate to very high levels of flash flood hazard areas was also discovered; (iii) high and very high flood hazard levels covering areas of 275 and 621.1 km2 were mainly detected along and close to the main rivers and streams, respectively. These results demonstrated the effectiveness of GIS techniques, AHP, and Landsat-8 remote sensing data for flash flood hazard mapping.","PeriodicalId":37517,"journal":{"name":"Geography, Environment, Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43642224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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