Household adaption to natural hazards has been critical in disaster prevention and mitigation in disaster-prone regions. However, the adaption of urban household to natural hazards is not yet fully understood, especially in the subtropical forested region of Southeast China. In this study, we investigated the urban household adaption to natural hazards in the forested region of southeastern China by using a multinomial logistic regression model to analyze 763 urban household questionnaire responses from 6 districts in Hangzhou City, Zhejiang province. The results indicated that (1) from high to low, the top 6 natural hazards deeply concerned by urban household of Hangzhou City were typhoon, rainstorm, lightning, flood, low temperature disaster and snow disaster and (2) gender, length of family residence, disaster awareness and household satisfaction all significantly influenced the urban household adaption to natural hazards. This study suggested that Government should improve channels for disaster publicity, strengthen community management and promote social emergency construction in future decades.
{"title":"Urban household adaption to natural hazards in Hangzhou City, China","authors":"Qian Liu, Ting Xu, Shanzhong Qi","doi":"10.25303/1610da049062","DOIUrl":"https://doi.org/10.25303/1610da049062","url":null,"abstract":"Household adaption to natural hazards has been critical in disaster prevention and mitigation in disaster-prone regions. However, the adaption of urban household to natural hazards is not yet fully understood, especially in the subtropical forested region of Southeast China. In this study, we investigated the urban household adaption to natural hazards in the forested region of southeastern China by using a multinomial logistic regression model to analyze 763 urban household questionnaire responses from 6 districts in Hangzhou City, Zhejiang province. The results indicated that (1) from high to low, the top 6 natural hazards deeply concerned by urban household of Hangzhou City were typhoon, rainstorm, lightning, flood, low temperature disaster and snow disaster and (2) gender, length of family residence, disaster awareness and household satisfaction all significantly influenced the urban household adaption to natural hazards. This study suggested that Government should improve channels for disaster publicity, strengthen community management and promote social emergency construction in future decades.","PeriodicalId":50576,"journal":{"name":"Disaster Advances","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135486177","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}
Coastal regions of India possess high population densities. The damage faced by the coastal ecosystem, especially the land–sea border, is increasing due to natural calamities during monsoon and cyclones as well as climate change. Land erosion is a significant concern nowadays because of the loss of human life and properties. Existing practice to prevent such damage is constructing a sea wall, groynes or tetrapods. Such construction requires huge manpower and money. The study discusses the importance of a bioshield in mitigating such calamities. Bioshields consist of a patch of vegetation at the land-sea border. The composition of such vegetation can be grasses, shrubs, creepers and trees. The current study discusses a few selected species for inclusion in such a bioshield with multipurpose objectives: income generation, enriching the local ecosystem and slowing down the calamities due to waves and wind.
{"title":"Bioshields as a viable solution for managing ecosystem-related disasters, offering a long-term solution to the frequent issue of sea erosion","authors":"S. Narasimhan","doi":"10.25303/1610da063066","DOIUrl":"https://doi.org/10.25303/1610da063066","url":null,"abstract":"Coastal regions of India possess high population densities. The damage faced by the coastal ecosystem, especially the land–sea border, is increasing due to natural calamities during monsoon and cyclones as well as climate change. Land erosion is a significant concern nowadays because of the loss of human life and properties. Existing practice to prevent such damage is constructing a sea wall, groynes or tetrapods. Such construction requires huge manpower and money. The study discusses the importance of a bioshield in mitigating such calamities. Bioshields consist of a patch of vegetation at the land-sea border. The composition of such vegetation can be grasses, shrubs, creepers and trees. The current study discusses a few selected species for inclusion in such a bioshield with multipurpose objectives: income generation, enriching the local ecosystem and slowing down the calamities due to waves and wind.","PeriodicalId":50576,"journal":{"name":"Disaster Advances","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135486173","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}
Soil erosion is one of the major threats to food security and agricultural sustainability worldwide. Numerous factors including relief, slope, land use, land cover, rainfall pattern, soil texture, conservation techniques and anthropogenic factors, combine to cause soil erosion. The enormity and spatial distribution of soil erosion should be known for effectively assessing and mapping erosion-prone areas. In the hill region, soil loss is a significant component in decreasing stability and persistent loss causes landslides. So in order to study this, various soil erosion models have come up amongst which RUSLE has been adopted by many researchers. The goal of the current study is to forecast the projected soil loss in Tukvar tea plantations of the Darjeeling district. This study will provide an estimate of the amount and rate of erosion in the Darjeeling district's Tukvar tea plantations. This study revealed that the leading factors to soil erosion are slope factors and rainfall erosivity. The geo-coded reference of the geographic extent of soil erosion-prone areas will be useful for micro-level planning and will serve as a useful tool for managing and conserving soil.
{"title":"Integrated Use of Remote Sensing and GIS in estimating Soil Erosion in the Tukvar Tea Plantation Area, Darjeeling, India by RUSLE Modelling","authors":"Manorama Thapa, Pribat Rai","doi":"10.25303/1610da011016","DOIUrl":"https://doi.org/10.25303/1610da011016","url":null,"abstract":"Soil erosion is one of the major threats to food security and agricultural sustainability worldwide. Numerous factors including relief, slope, land use, land cover, rainfall pattern, soil texture, conservation techniques and anthropogenic factors, combine to cause soil erosion. The enormity and spatial distribution of soil erosion should be known for effectively assessing and mapping erosion-prone areas. In the hill region, soil loss is a significant component in decreasing stability and persistent loss causes landslides. So in order to study this, various soil erosion models have come up amongst which RUSLE has been adopted by many researchers. The goal of the current study is to forecast the projected soil loss in Tukvar tea plantations of the Darjeeling district. This study will provide an estimate of the amount and rate of erosion in the Darjeeling district's Tukvar tea plantations. This study revealed that the leading factors to soil erosion are slope factors and rainfall erosivity. The geo-coded reference of the geographic extent of soil erosion-prone areas will be useful for micro-level planning and will serve as a useful tool for managing and conserving soil.","PeriodicalId":50576,"journal":{"name":"Disaster Advances","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135486182","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}
The Horn of Africa is considered as one of the seismically active regions on the African continent because of the Main Ethiopian rift system, one of the most active rift systems within the East African rift system. Therefore, it is essential to continuously analyze the seismicity to assess seismic hazards in a region of interest. To this end, seismicity information for the Horn of Africa was collected from ISC catalogues from the year 1973 to 2022 in the latitude range of 0N - 20N and the longitude range of 30E -52E from the surface to 700km below the surface. Then, as a measure of the seismicity in the Horn, Gutenberg's parameters and the spatial variation of the seismic moment were examined. According to the findings, the North Main Ethiopian Rift (NMER) is under more stress than the Central Main Ethiopian Rift (CMER) regarding seismic moment release. The Richter and Guttenberg's constants of a=6.85, b=0.88 and Mc=4.5 were obtained across the whole Horn of Africa, whereas the corresponding values for NMER, CMER and SMER were a=5.6, b=0.78, Mc=4.5; a=5.9, b=0.87, Mc=4.5; and a=6.9, b=1.03, Mc=5.0 respectively. Overall, the distribution of focal depths and magnitude showed that the distribution of seismicity in the Horn of Africa is shallow with an average focal depth of around 11 km.
非洲之角被认为是非洲大陆上地震活跃的地区之一，因为埃塞俄比亚主裂谷系统是东非裂谷系统中最活跃的裂谷系统之一。因此，对地震活动性进行连续分析以评估某一地区的地震危险性是十分必要的。为此，从1973年至2022年的ISC目录中收集了非洲之角从地表到地表以下700km的纬度范围为0 N - 20 N，经度范围为30 E -52 E的地震活动信息。然后，作为对非洲之角地区地震活动性的测量，对古腾堡参数和地震矩的空间变化进行了检验。根据研究结果，在地震矩释放方面，埃塞俄比亚北部主裂谷(NMER)比埃塞俄比亚中部主裂谷(CMER)承受更大的压力。整个非洲之角的Richter和Guttenberg常数分别为a=6.85、b=0.88和Mc=4.5，而NMER、CMER和SMER的对应值分别为a=5.6、b=0.78和Mc=4.5;a=5.9, b=0.87, Mc=4.5;a=6.9, b=1.03, Mc=5.0。总体而言，震源深度和震级分布表明，非洲之角地震活动性分布较浅，平均震源深度约为11 km。
{"title":"Statistical Analysis of Seismicity in the Horn of Africa","authors":"Letamo Alemayehu, B. Kavitha, T.P. Tezeswi","doi":"10.25303/1610da017023","DOIUrl":"https://doi.org/10.25303/1610da017023","url":null,"abstract":"The Horn of Africa is considered as one of the seismically active regions on the African continent because of the Main Ethiopian rift system, one of the most active rift systems within the East African rift system. Therefore, it is essential to continuously analyze the seismicity to assess seismic hazards in a region of interest. To this end, seismicity information for the Horn of Africa was collected from ISC catalogues from the year 1973 to 2022 in the latitude range of 0N - 20N and the longitude range of 30E -52E from the surface to 700km below the surface. Then, as a measure of the seismicity in the Horn, Gutenberg's parameters and the spatial variation of the seismic moment were examined. According to the findings, the North Main Ethiopian Rift (NMER) is under more stress than the Central Main Ethiopian Rift (CMER) regarding seismic moment release. The Richter and Guttenberg's constants of a=6.85, b=0.88 and Mc=4.5 were obtained across the whole Horn of Africa, whereas the corresponding values for NMER, CMER and SMER were a=5.6, b=0.78, Mc=4.5; a=5.9, b=0.87, Mc=4.5; and a=6.9, b=1.03, Mc=5.0 respectively. Overall, the distribution of focal depths and magnitude showed that the distribution of seismicity in the Horn of Africa is shallow with an average focal depth of around 11 km.","PeriodicalId":50576,"journal":{"name":"Disaster Advances","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135486176","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}
Coastal aquifers suffer from saltwater intrusion due to several natural and anthropogenic activities and they pose a severe problem in many coastal regions of India. Anthropogenic activities like saltwater aquaculture activities and salt pans are one of the major causes for saltwater intrusion into freshwater aquifers in coastal regions. Along with these activities, over-exploitation of fresh groundwater for domestic and agriculture purpose also leads to infiltration of saltwater into shallow freshwater aquifers. To address this effect, it is necessary to understand the spatial distribution and extent of the saltwater intrusion in coastal areas. In the present study, SEAWAT model is used to delineate the saltwater intrusion effect and predict the extent of saltwater intrusion resulting from anthropogenic activities in the Nizampatnam coastal area, Andhra Pradesh. The simulation was carried out for the period 2016 to 2018 revealing a change in the extent of the saltwater intrusion up to 2 km into the inland areas from the coast as well as in the vicinity of fishponds. Based on the hydrological conditions observed during the study period and leveraging the calibrated model, saltwater intrusion prediction was carried out for the next two decades. The results show that anthropogenic activities will lead to saltwater intrusion into freshwater aquifers up to 6 km into inland areas from coast at a rate of 200 m/year. Therefore, the sustainable management plans are essential for protecting the freshwater aquifers from the saltwater intrusion in the Nizampatnam coastal area.
{"title":"Modelling the Spatial Distribution and Future Trends of Seawater Intrusion due to Aquaculture Activities in Coastal Aquifers of Nizampatnam, Andhra Pradesh","authors":"Gopaiah Manne, Iswar Chandra Das, Vazeer Mahammood","doi":"10.25303/1610da01010","DOIUrl":"https://doi.org/10.25303/1610da01010","url":null,"abstract":"Coastal aquifers suffer from saltwater intrusion due to several natural and anthropogenic activities and they pose a severe problem in many coastal regions of India. Anthropogenic activities like saltwater aquaculture activities and salt pans are one of the major causes for saltwater intrusion into freshwater aquifers in coastal regions. Along with these activities, over-exploitation of fresh groundwater for domestic and agriculture purpose also leads to infiltration of saltwater into shallow freshwater aquifers. To address this effect, it is necessary to understand the spatial distribution and extent of the saltwater intrusion in coastal areas. In the present study, SEAWAT model is used to delineate the saltwater intrusion effect and predict the extent of saltwater intrusion resulting from anthropogenic activities in the Nizampatnam coastal area, Andhra Pradesh. The simulation was carried out for the period 2016 to 2018 revealing a change in the extent of the saltwater intrusion up to 2 km into the inland areas from the coast as well as in the vicinity of fishponds. Based on the hydrological conditions observed during the study period and leveraging the calibrated model, saltwater intrusion prediction was carried out for the next two decades. The results show that anthropogenic activities will lead to saltwater intrusion into freshwater aquifers up to 6 km into inland areas from coast at a rate of 200 m/year. Therefore, the sustainable management plans are essential for protecting the freshwater aquifers from the saltwater intrusion in the Nizampatnam coastal area.","PeriodicalId":50576,"journal":{"name":"Disaster Advances","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135486183","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}
The problem of environmental degradation due to deterioration of natural resources has become an important issue and is one of the burning problems in the 21st century in northeast India, especially in Mizoram. It is clear that deforestation, ground water depletion, soil erosion, decline in rainfall, river water pollution and volume decreases in dry season are the major threats to environmental degradation in this fragile terrain. Anthropogenic activities by land use changes due to settlement expansion, over exploitation of land and forest resources for intensive agriculture appear to be the major causes for the fast depletion of resources. Therefore, it is necessary to protect natural resources in order to mitigate multi-dimensional environmental degradation. This study is an attempt to analyze the causes and consequences of environmental degradation in this area based on the resources of land, water and forest. Implementation of appropriate measures like judicious use of natural resources, utilizing education to minimize economic backwardness and inclusion of community participation helps to mitigate environmental deterioration to great extent.
{"title":"Causes and Consequences of Environmental Degradation in Mizoram, Northeast India","authors":"Vanlaltanpuia ., Ch. Udaya Bhaskara Rao, Vangchhia Lalrinpuia","doi":"10.25303/1610da041048","DOIUrl":"https://doi.org/10.25303/1610da041048","url":null,"abstract":"The problem of environmental degradation due to deterioration of natural resources has become an important issue and is one of the burning problems in the 21st century in northeast India, especially in Mizoram. It is clear that deforestation, ground water depletion, soil erosion, decline in rainfall, river water pollution and volume decreases in dry season are the major threats to environmental degradation in this fragile terrain. Anthropogenic activities by land use changes due to settlement expansion, over exploitation of land and forest resources for intensive agriculture appear to be the major causes for the fast depletion of resources. Therefore, it is necessary to protect natural resources in order to mitigate multi-dimensional environmental degradation. This study is an attempt to analyze the causes and consequences of environmental degradation in this area based on the resources of land, water and forest. Implementation of appropriate measures like judicious use of natural resources, utilizing education to minimize economic backwardness and inclusion of community participation helps to mitigate environmental deterioration to great extent.","PeriodicalId":50576,"journal":{"name":"Disaster Advances","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135486174","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}
S. Suriya, Y. Rekha, P. Vincent, Kumar M. Madhan, V. Priya
Floods are natural disasters that cause losses and damages to lives, properties and the nature. The main objective of this study is to perform hydraulic analysis using HEC-RAS and to suggest measures to mitigate flood. The study area chosen for analysis is Vellayampalayam to Sathyamangalam stretch which is located along the Bhavani river. These areas are frequently affected due to flood. Field survey is carried out to determine cross section data (width, depth, elevation of the river stretch). Discharge is calculated using rational method. These data are feed as input into HEC-RAS model for simulation. From the results, it was found that the areas around the stretch chosen as study area are greatly affected by the floods. As per field condition, the channel improvement plans were suggested to mitigate the effects of flood.
{"title":"Assessment of inundation risk at Bhavani River (stretch from Sathyamangalam to Velliyampalayam) using HEC-RAS","authors":"S. Suriya, Y. Rekha, P. Vincent, Kumar M. Madhan, V. Priya","doi":"10.25303/1610da024029","DOIUrl":"https://doi.org/10.25303/1610da024029","url":null,"abstract":"Floods are natural disasters that cause losses and damages to lives, properties and the nature. The main objective of this study is to perform hydraulic analysis using HEC-RAS and to suggest measures to mitigate flood. The study area chosen for analysis is Vellayampalayam to Sathyamangalam stretch which is located along the Bhavani river. These areas are frequently affected due to flood. Field survey is carried out to determine cross section data (width, depth, elevation of the river stretch). Discharge is calculated using rational method. These data are feed as input into HEC-RAS model for simulation. From the results, it was found that the areas around the stretch chosen as study area are greatly affected by the floods. As per field condition, the channel improvement plans were suggested to mitigate the effects of flood.","PeriodicalId":50576,"journal":{"name":"Disaster Advances","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135486178","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}
Roi Milyardi, Asriwiyanti Desiani, Hendry Wong, Deni Setiawan, Ginardy Husada
Indonesia is an earthquake-prone country. In many earthquakes, school buildings suffer the most damage than other public facilities. In 2020, the conditions of around 70% of 218,234 school classrooms in Indonesia were deteriorating. This contributed to a significant earthquake vulnerability. Limited funding for rehabilitation and renovation became an obstacle to reduce the vulnerability. This study proposed that Rapid Visual Screening (RVS), which is a simple method and has a wide coverage, could be a solution to prioritize building rehabilitation. Bandung, the capital city of the most populated province in Indonesia, has complex earthquake hazard risks, which made it a suitable study area for implementing RVS. This study conducted a seismic vulnerability assessment of school buildings in the city of Bandung, Indonesia. The methodology used is based on Indonesia National Disaster Management Agency (BNPB)’s Regulation No. 4 of 2012 on Rapid Visual Screening (RVS) procedure compared to FEMA 154 RVS procedure with local hazard data and building data. RVS was conducted in total 334 elementary school buildings in 30 districts. The result of the BNPB’s RVS procedure showed an average RVS score (S) of 4.455 where 36.53% buildings were in safe condition and 63.47% buildings required further assessment of the conditions from construction experts. The result of the FEMA 154 RVS procedure showed an average RVS score (S) of 0.905 where 22.16% of the buildings were in high probability of grade 4 damage and 77.84% of the buildings were in high probability of grade 3 damage.
{"title":"Assessment of Seismic Vulnerability of School Buildings: A case study in Bandung, West Java, Indonesia","authors":"Roi Milyardi, Asriwiyanti Desiani, Hendry Wong, Deni Setiawan, Ginardy Husada","doi":"10.25303/1609da049059","DOIUrl":"https://doi.org/10.25303/1609da049059","url":null,"abstract":"Indonesia is an earthquake-prone country. In many earthquakes, school buildings suffer the most damage than other public facilities. In 2020, the conditions of around 70% of 218,234 school classrooms in Indonesia were deteriorating. This contributed to a significant earthquake vulnerability. Limited funding for rehabilitation and renovation became an obstacle to reduce the vulnerability. This study proposed that Rapid Visual Screening (RVS), which is a simple method and has a wide coverage, could be a solution to prioritize building rehabilitation. Bandung, the capital city of the most populated province in Indonesia, has complex earthquake hazard risks, which made it a suitable study area for implementing RVS. This study conducted a seismic vulnerability assessment of school buildings in the city of Bandung, Indonesia. The methodology used is based on Indonesia National Disaster Management Agency (BNPB)’s Regulation No. 4 of 2012 on Rapid Visual Screening (RVS) procedure compared to FEMA 154 RVS procedure with local hazard data and building data. RVS was conducted in total 334 elementary school buildings in 30 districts. The result of the BNPB’s RVS procedure showed an average RVS score (S) of 4.455 where 36.53% buildings were in safe condition and 63.47% buildings required further assessment of the conditions from construction experts. The result of the FEMA 154 RVS procedure showed an average RVS score (S) of 0.905 where 22.16% of the buildings were in high probability of grade 4 damage and 77.84% of the buildings were in high probability of grade 3 damage.","PeriodicalId":50576,"journal":{"name":"Disaster Advances","volume":"206 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135163245","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}
The impact of coastal abrasion and tidal flooding will disrupt public security and community welfare, especially economic and social resilience. There must be efforts to prevent adverse impacts so that there is no decrease in economic and social resilience. This study uses a qualitative method with a descriptive design. The purpose of this study was to analyze the effect of the efforts of preventing the adverse impact of coastal abrasion and tidal flooding on economic and social resilience on the coast of Bekasi, West Java. The research was conducted from April 2022 to December 2022 with 15 informants. The results of the study were: a) the efforts of preventing the adverse impact were engaging the community, comprehensive vegetation mitigation training, changing the procedure for planting mangrove forests, developing fruit yields and developing a mangrove program as a prospective project; b) the effects on the economic resilience of community are still able to meet their daily needs even though they experienced a decrease in daily income. The community is still implementing social interaction and cooperation well and also they still help each other and do not want to move to other locations. The community still has a high level to maintain economic and social resilience.
{"title":"The Prevention Efforts of the Adverse Impact of Abrasion and Tidal Flooding and Effects on the Economic and Social Resilience","authors":"Anwar Kurniadi, Syamsul Maarif","doi":"10.25303/1609da0107","DOIUrl":"https://doi.org/10.25303/1609da0107","url":null,"abstract":"The impact of coastal abrasion and tidal flooding will disrupt public security and community welfare, especially economic and social resilience. There must be efforts to prevent adverse impacts so that there is no decrease in economic and social resilience. This study uses a qualitative method with a descriptive design. The purpose of this study was to analyze the effect of the efforts of preventing the adverse impact of coastal abrasion and tidal flooding on economic and social resilience on the coast of Bekasi, West Java. The research was conducted from April 2022 to December 2022 with 15 informants. The results of the study were: a) the efforts of preventing the adverse impact were engaging the community, comprehensive vegetation mitigation training, changing the procedure for planting mangrove forests, developing fruit yields and developing a mangrove program as a prospective project; b) the effects on the economic resilience of community are still able to meet their daily needs even though they experienced a decrease in daily income. The community is still implementing social interaction and cooperation well and also they still help each other and do not want to move to other locations. The community still has a high level to maintain economic and social resilience.","PeriodicalId":50576,"journal":{"name":"Disaster Advances","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135163044","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}
Nowadays, due to higher rate of construction activities, useful and effective lands are harder to find for construction purposes. So, the lands which are problematic are now used for construction purposes. The techniques used for improving these problematic lands are called ground improvement techniques. Among all the ground improvement techniques, stone columns are most effective and economical to improve the shear strength and bearing capacity of soil and thus, to reduce the settlement phenomenon. The main objective of the present study is to determine the total displacement of the soil foundation. For this purpose, parametric analysis was carried out to study the effect of two parameters namely stone column diameter and stone column spacing on the total displacement values. Finite element analysis was used to evaluate the displacement of soil strata reinforced with stone column using PlAXIS-2D software. The analysis was carried out for static load applied from top and Bhuj earthquake prescribed as dynamic loading. From present study, it was found that by decreasing the column spacing at a constant diameter of 1m, the maximum total displacement reduction was 36.73% and by increasing the column diameter at constant column spacing of 2m, the maximum total displacement reduction was 39.75%. Thus, it was concluded that by decreasing the column spacing at constant diameter and by increasing the column diameter at constant spacing respectively, there is a tremendous decrease in total displacement of the soil foundation which increases the load bearing capacity of the soils.
{"title":"Parametric Study on Stone Column for improving Seismic Response of Foundation","authors":"Mandeep Kumar, Pradeep Muley, N.M. Syed, Rakesh Kumar","doi":"10.25303/1609da031037","DOIUrl":"https://doi.org/10.25303/1609da031037","url":null,"abstract":"Nowadays, due to higher rate of construction activities, useful and effective lands are harder to find for construction purposes. So, the lands which are problematic are now used for construction purposes. The techniques used for improving these problematic lands are called ground improvement techniques. Among all the ground improvement techniques, stone columns are most effective and economical to improve the shear strength and bearing capacity of soil and thus, to reduce the settlement phenomenon. The main objective of the present study is to determine the total displacement of the soil foundation. For this purpose, parametric analysis was carried out to study the effect of two parameters namely stone column diameter and stone column spacing on the total displacement values. Finite element analysis was used to evaluate the displacement of soil strata reinforced with stone column using PlAXIS-2D software. The analysis was carried out for static load applied from top and Bhuj earthquake prescribed as dynamic loading. From present study, it was found that by decreasing the column spacing at a constant diameter of 1m, the maximum total displacement reduction was 36.73% and by increasing the column diameter at constant column spacing of 2m, the maximum total displacement reduction was 39.75%. Thus, it was concluded that by decreasing the column spacing at constant diameter and by increasing the column diameter at constant spacing respectively, there is a tremendous decrease in total displacement of the soil foundation which increases the load bearing capacity of the soils.","PeriodicalId":50576,"journal":{"name":"Disaster Advances","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135163041","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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