M. Kawuryan, A. Fathani, E. Purnomo, L. Salsabila, Novia Amirah Azmi, D. Setiawan, Mochammad Iqbal Fadhlurrohman
Along with the many potentials in developing the tourism sector and impressive research in the tourism sector, in the last ten years, interest in studying and researching the sustainability of the development of Indonesia's tourism sector has continued to increase significantly. However, despite the increase, the scientific literature published so far has not evaluated in detail the sustainability of Indonesia's tourism development. This study analyzed 861 articles published until February 2021 in the Scopus database on Indonesia's tourism development sustainability. In conducting the analysis, the VosViewer software was used to find results about the most contributing authors, the number of citations, regions, organization, publica-tions and co-occurrences of keywords that could provide new gaps in future research. The results obtained showed trends and impacts of literature published to date, then new gaps/novelties for further research related to the themes of sport tourism, mangrove tourism, sharia tourism and Indonesia's tourism resilience were found. With these results, the next researchers should raise the theme so that Indonesian tourism's sustainability can develop adequately to have a more significant impact in the future.
{"title":"Sustainable Tourism Development in Indonesia: Bibliometric Review and Analysis","authors":"M. Kawuryan, A. Fathani, E. Purnomo, L. Salsabila, Novia Amirah Azmi, D. Setiawan, Mochammad Iqbal Fadhlurrohman","doi":"10.22146/ijg.64657","DOIUrl":"https://doi.org/10.22146/ijg.64657","url":null,"abstract":"Along with the many potentials in developing the tourism sector and impressive research in the tourism sector, in the last ten years, interest in studying and researching the sustainability of the development of Indonesia's tourism sector has continued to increase significantly. However, despite the increase, the scientific literature published so far has not evaluated in detail the sustainability of Indonesia's tourism development. This study analyzed 861 articles published until February 2021 in the Scopus database on Indonesia's tourism development sustainability. In conducting the analysis, the VosViewer software was used to find results about the most contributing authors, the number of citations, regions, organization, publica-tions and co-occurrences of keywords that could provide new gaps in future research. The results obtained showed trends and impacts of literature published to date, then new gaps/novelties for further research related to the themes of sport tourism, mangrove tourism, sharia tourism and Indonesia's tourism resilience were found. With these results, the next researchers should raise the theme so that Indonesian tourism's sustainability can develop adequately to have a more significant impact in the future.","PeriodicalId":52460,"journal":{"name":"Indonesian Journal of Geography","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45529154","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}
H. Agussaini, Sirojuzilam Sirojuzilam, Rujiman Rujiman, A. Purwoko
Ten years after rehabilitating and reconstructing some coastal areas of Banda Ache struck by the tsunami, and the city is currently repopulated, with most of its open land and community ponds converted into settlements. This rise in population needs to be controlled to minimize damages and casualties, assuming the tsunami hits again. Presently, the Banda Aceh City spatial plan for 2029 does not have a clear concept of tsunami mitigation, specifically in the spatial pattern of coastal areas. Therefore, this research aims to remap the vulnerability level of the Banda Aceh City coastal area from the tsunami hazard and determine alternative strategies based on the tsunami level in achieving safe, comfortable, productive, and sustainable spatial planning goals. This starts by analyzing the wave height generated by the earthquake that triggered this natural disaster and mapping the spatial distribution of the area and the tsunami's inundation height. The results showed that the proportionate regions prone to Level-2 tsunami were worse than the 2004 disaster based on the water level markers built in the city. The spatial planning strategies for the coastal area of Banda Aceh City are carried out by determining the level of tsunami-prone and the potential of the area's resources through a new approach of the multi-layer tsunami defence systems by combining sea dike, greenbelt, silvo-fishery, and the elevated road.
{"title":"A New Approach of the Tsunami Mitigation Strategies for the City of Banda Aceh, Indonesia","authors":"H. Agussaini, Sirojuzilam Sirojuzilam, Rujiman Rujiman, A. Purwoko","doi":"10.22146/ijg.66500","DOIUrl":"https://doi.org/10.22146/ijg.66500","url":null,"abstract":"Ten years after rehabilitating and reconstructing some coastal areas of Banda Ache struck by the tsunami, and the city is currently repopulated, with most of its open land and community ponds converted into settlements. This rise in population needs to be controlled to minimize damages and casualties, assuming the tsunami hits again. Presently, the Banda Aceh City spatial plan for 2029 does not have a clear concept of tsunami mitigation, specifically in the spatial pattern of coastal areas. Therefore, this research aims to remap the vulnerability level of the Banda Aceh City coastal area from the tsunami hazard and determine alternative strategies based on the tsunami level in achieving safe, comfortable, productive, and sustainable spatial planning goals. This starts by analyzing the wave height generated by the earthquake that triggered this natural disaster and mapping the spatial distribution of the area and the tsunami's inundation height. The results showed that the proportionate regions prone to Level-2 tsunami were worse than the 2004 disaster based on the water level markers built in the city. The spatial planning strategies for the coastal area of Banda Aceh City are carried out by determining the level of tsunami-prone and the potential of the area's resources through a new approach of the multi-layer tsunami defence systems by combining sea dike, greenbelt, silvo-fishery, and the elevated road.","PeriodicalId":52460,"journal":{"name":"Indonesian Journal of Geography","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43578968","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. S. Abdeen, S. H. Abd El Nabi, Moataz El said El Manawy, Reda Esmat El-Arafy, K. Farag
In this paper, an attempt was tried to study the relation between the land surface heat temperature (LST), extracted, from the thermal emission infrared data (ASTER-TIR) and (Landsat-8-TIR) imagery and radiogenic heat production rate (RHPR) that calculated from airborne gamma-ray spectrometric data applied on west Ras Gharib area at Northeastern Desert of Egypt. The area is geologically covered mainly by Precambrian basement rocks, which are unconformably overlain by Phanerozoic sedimentary succession. The method used for extraction land surface heat temperature for both ASTER-TIR and Landsat-8-TIR images is the reference channel emissivity technique and founded as the best method comparing to others. The study results showed a relative higher RHPR threshold value reached 4.8 μW/m3. On the other hand, ASTER-TIR Land Surface Temperature (AST-LST) ranges between 27.64oC to 47.2oC and, the Landsat 8-TIR Land Surface Temperature (LS8-LST) ranges between 30.64oC to 50.68oC. Comparing all results, there were a weak relationship or to some extent parallel relation between RHPR and satellite LST; as when the value of the Y-axis is constant, there are multiple values on X-axis, so it is not possible to deduce the value of one variable in terms of the other. The poor relation is regarded to the very weak RHPR which is not enough to affect the surface heat temperature, emission that could be detected by both thermal sensors of ASTER and Landsat-8 satellite TIR data. Other factors such as: topography, wind, shading and scattering, rock moisture and density, can strongly affect the surface temperature. In conclusion, the output results could be improved in areas of very high radioelement concentrations especially 235U, and through the use of the enhanced spatial resolution of future satellite TIR imaging instruments.
{"title":"Investigation of a Relation between Radiogenic Heat Production Rate (RHPR) and Land Surface Heat Temperature (LST) from Thermal Bands of ASTER and Landsat-8 (TIR-Data): Case Study of West Ras Gharib area North Eastern Desert, Egypt","authors":"S. S. Abdeen, S. H. Abd El Nabi, Moataz El said El Manawy, Reda Esmat El-Arafy, K. Farag","doi":"10.22146/ijg.64975","DOIUrl":"https://doi.org/10.22146/ijg.64975","url":null,"abstract":"In this paper, an attempt was tried to study the relation between the land surface heat temperature (LST), extracted, from the thermal emission infrared data (ASTER-TIR) and (Landsat-8-TIR) imagery and radiogenic heat production rate (RHPR) that calculated from airborne gamma-ray spectrometric data applied on west Ras Gharib area at Northeastern Desert of Egypt. The area is geologically covered mainly by Precambrian basement rocks, which are unconformably overlain by Phanerozoic sedimentary succession. The method used for extraction land surface heat temperature for both ASTER-TIR and Landsat-8-TIR images is the reference channel emissivity technique and founded as the best method comparing to others. The study results showed a relative higher RHPR threshold value reached 4.8 μW/m3. On the other hand, ASTER-TIR Land Surface Temperature (AST-LST) ranges between 27.64oC to 47.2oC and, the Landsat 8-TIR Land Surface Temperature (LS8-LST) ranges between 30.64oC to 50.68oC. Comparing all results, there were a weak relationship or to some extent parallel relation between RHPR and satellite LST; as when the value of the Y-axis is constant, there are multiple values on X-axis, so it is not possible to deduce the value of one variable in terms of the other. The poor relation is regarded to the very weak RHPR which is not enough to affect the surface heat temperature, emission that could be detected by both thermal sensors of ASTER and Landsat-8 satellite TIR data. Other factors such as: topography, wind, shading and scattering, rock moisture and density, can strongly affect the surface temperature. In conclusion, the output results could be improved in areas of very high radioelement concentrations especially 235U, and through the use of the enhanced spatial resolution of future satellite TIR imaging instruments. ","PeriodicalId":52460,"journal":{"name":"Indonesian Journal of Geography","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43957565","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}
J. Daramola, T. M. Ekhwan, L. K. Choy, J. Mokhtar, Adeyemi Jibrin Alakeji
Many authors have identified climate variation impacts in Nigeria. However, the effects on water balance and water yield have not been thoroughly considered. Good knowledge of water balances is vital for sustainable water resource management in northern Nigeria due to high water stress and increased evapotranspiration compared to another part of the country. Hence, the study presents the first detailed climatic variation impacts on watershed water balance and water yield in north-central Nigeria. Soil and Water Assessment Tool (SWAT) was applied to predict the hydrological procedures. The Kaduna watershed (32,124 km2) calibrated and validated streamflow results were run independently using three land cover maps of 1975, 2000, and 2013. The model performance evaluation was statically attained using the coefficient of determination (r2), Nash-Sutcliffe (NS), besides the percentage of observed data (p-factor). The model evaluation result of r2 (0.80), NS (0.71), and p-factors of 0.86 indicated the model satisfactory performance evaluation of streamflow predictions. The streamflow estimation revealed Threshold depth of water (GWQMN.gw) as the most sensitive parameter. The findings discovered declined between 1975 and 2013 in precipitation, water yield, surface runoff (SURQ_mm), lateral flow (LAT_Qmm), deep aquifer (Deep_mm) by 4.2%, 37.3%, 56%, 15%, and 100% respectively, while shallow groundwater aquifer (GW_Qmm) experienced 10% decrease between 1975 and 2000 and appreciated by 6% between 2000 and 2013, evapotranspiration (ET_mm) increase by about 22.2% between 1975 and 2013. These results suggest considerable effects of climate variation in the watershed and call for further investigation to mitigate climate change influence.
{"title":"Impacts of Climatic Variation on Water Balance and Yield of Watershed (Insights from The Kaduna Watershed, North Central Nigeria)","authors":"J. Daramola, T. M. Ekhwan, L. K. Choy, J. Mokhtar, Adeyemi Jibrin Alakeji","doi":"10.22146/ijg.68138","DOIUrl":"https://doi.org/10.22146/ijg.68138","url":null,"abstract":"Many authors have identified climate variation impacts in Nigeria. However, the effects on water balance and water yield have not been thoroughly considered. Good knowledge of water balances is vital for sustainable water resource management in northern Nigeria due to high water stress and increased evapotranspiration compared to another part of the country. Hence, the study presents the first detailed climatic variation impacts on watershed water balance and water yield in north-central Nigeria. Soil and Water Assessment Tool (SWAT) was applied to predict the hydrological procedures. The Kaduna watershed (32,124 km2) calibrated and validated streamflow results were run independently using three land cover maps of 1975, 2000, and 2013. The model performance evaluation was statically attained using the coefficient of determination (r2), Nash-Sutcliffe (NS), besides the percentage of observed data (p-factor). The model evaluation result of r2 (0.80), NS (0.71), and p-factors of 0.86 indicated the model satisfactory performance evaluation of streamflow predictions. The streamflow estimation revealed Threshold depth of water (GWQMN.gw) as the most sensitive parameter. The findings discovered declined between 1975 and 2013 in precipitation, water yield, surface runoff (SURQ_mm), lateral flow (LAT_Qmm), deep aquifer (Deep_mm) by 4.2%, 37.3%, 56%, 15%, and 100% respectively, while shallow groundwater aquifer (GW_Qmm) experienced 10% decrease between 1975 and 2000 and appreciated by 6% between 2000 and 2013, evapotranspiration (ET_mm) increase by about 22.2% between 1975 and 2013. These results suggest considerable effects of climate variation in the watershed and call for further investigation to mitigate climate change influence. ","PeriodicalId":52460,"journal":{"name":"Indonesian Journal of Geography","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44232421","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}
This study aimed to determine the socio-economic conditions related to marketing margins of demersal fish in Beeng Laut Island, Sangihe Archipelago Regency, North Sulawesi Province, Indonesia, using survey methods with interview and questionnaire techniques. Most fishers on Beeng Laut Island have a primary school education, houses constructed using wood, and an age range of 20 to 30 years. Margin marketing demersal fish on Channel marketing III (P à Pp à Pe à Ka) and Channel IV (P à Pp à Rm à Ka) is inefficient due to the limited electricity supply. This has an indirect effect on fish quality due to a lack of readily available ice to handle catches. Increased demersal fish marketing efficiency may result in a significant revenue for fishers. Therefore, the government should boost energy availability to enable people create and purchase ice to aid with fish preservation. It should also establish cooperatives for fishers and provide alternative work, such as conservation activities or marine tourism development.
{"title":"The Socio-economic Conditions of Fishers on Indonesia's Beeng Laut Island","authors":"Costantein Imanuel Sarapil, Eunike Irene Kumaseh, Getruida Nita Mozes","doi":"10.22146/ijg.60546","DOIUrl":"https://doi.org/10.22146/ijg.60546","url":null,"abstract":"This study aimed to determine the socio-economic conditions related to marketing margins of demersal fish in Beeng Laut Island, Sangihe Archipelago Regency, North Sulawesi Province, Indonesia, using survey methods with interview and questionnaire techniques. Most fishers on Beeng Laut Island have a primary school education, houses constructed using wood, and an age range of 20 to 30 years. Margin marketing demersal fish on Channel marketing III (P à Pp à Pe à Ka) and Channel IV (P à Pp à Rm à Ka) is inefficient due to the limited electricity supply. This has an indirect effect on fish quality due to a lack of readily available ice to handle catches. Increased demersal fish marketing efficiency may result in a significant revenue for fishers. Therefore, the government should boost energy availability to enable people create and purchase ice to aid with fish preservation. It should also establish cooperatives for fishers and provide alternative work, such as conservation activities or marine tourism development.","PeriodicalId":52460,"journal":{"name":"Indonesian Journal of Geography","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43950431","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}
This study aims to describe the role of changes in the characteristics of spatial patterns on the environmental quality in Tangerang City, Indonesia. It was carried out by detecting and explaining the effect of thermal comfort on the residential area using a combination of spatial and statistical analysis methods. The results showed that the changes in the characteristics of the spatial pattern, which include building density, vegetation area, accessibility, and road network connectivity significantly affected the spatial environmental quality index (IKLS) and temperature heat index (THI). Meanwhile, the changes in THI were caused by the continuous decline in vegetation area and an increase in population due to the urbanization process of Jakarta and other cities.
{"title":"Spatial Environmental Quality Assessment Of Settlement Area In Tangerang City","authors":"D. Martono, H. G. Saiya, S. Amri","doi":"10.22146/ijg.65825","DOIUrl":"https://doi.org/10.22146/ijg.65825","url":null,"abstract":"This study aims to describe the role of changes in the characteristics of spatial patterns on the environmental quality in Tangerang City, Indonesia. It was carried out by detecting and explaining the effect of thermal comfort on the residential area using a combination of spatial and statistical analysis methods. The results showed that the changes in the characteristics of the spatial pattern, which include building density, vegetation area, accessibility, and road network connectivity significantly affected the spatial environmental quality index (IKLS) and temperature heat index (THI). Meanwhile, the changes in THI were caused by the continuous decline in vegetation area and an increase in population due to the urbanization process of Jakarta and other cities.","PeriodicalId":52460,"journal":{"name":"Indonesian Journal of Geography","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42401753","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}
. Culinary business actors in the culinary industry at Yogyakarta provide Online Food Delivery Services to facilitate the trade. This study, therefore, aims to identify the benefits of Online Food Delivery Services as well as the market reach from the providers' point of view, and further analyzes the intrinsic role played in increasing competitiveness in the culinary industry of Yogyakarta during the Covid-19 pandemic. The process involved a qualitative method, where data was collected through semi-structured interviews, observation, and documentation. Subsequently, qualitative descriptive analysis techniques were used for analysis. Based on the study results, online food delivery services were determined to be beneficial in terms of effectiveness and efficiency in performance, organizational structure, and strategic and competitive advantage. The providers reportedly reached markets at distances up to 25 km-30 km. These actors play a significant role in increasing the competitiveness of the creative industry, particularly in the culinary sub-sector in Yogyakarta City during the pandemic. Moreover, this assumption is based on aspects of competition between similar companies, where the bargaining power of buyers, the threat of new entrants and substitute products were significant.
{"title":"The Role of Online Food Delivery Services in the Competitiveness of the Yogyakarta Culinary Industry during the Covid-19 Pandemic","authors":"Dariya Nawar Salma, R. Rachmawati","doi":"10.22146/ijg.68508","DOIUrl":"https://doi.org/10.22146/ijg.68508","url":null,"abstract":". Culinary business actors in the culinary industry at Yogyakarta provide Online Food Delivery Services to facilitate the trade. This study, therefore, aims to identify the benefits of Online Food Delivery Services as well as the market reach from the providers' point of view, and further analyzes the intrinsic role played in increasing competitiveness in the culinary industry of Yogyakarta during the Covid-19 pandemic. The process involved a qualitative method, where data was collected through semi-structured interviews, observation, and documentation. Subsequently, qualitative descriptive analysis techniques were used for analysis. Based on the study results, online food delivery services were determined to be beneficial in terms of effectiveness and efficiency in performance, organizational structure, and strategic and competitive advantage. The providers reportedly reached markets at distances up to 25 km-30 km. These actors play a significant role in increasing the competitiveness of the creative industry, particularly in the culinary sub-sector in Yogyakarta City during the pandemic. Moreover, this assumption is based on aspects of competition between similar companies, where the bargaining power of buyers, the threat of new entrants and substitute products were significant.","PeriodicalId":52460,"journal":{"name":"Indonesian Journal of Geography","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45137037","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}
H. Hendrayana, I. Riyanto, Azmin Nuha, A. R. K. Lisan
The number of unregistered artesian wells increases every year in the northern slopes of Bromo Volcano, Pasuruan. Artesian wells are used for domestic needs and agricultural irrigation but are not followed by environmentally sound groundwater use. The purpose of this study is to assess the potential for groundwater, groundwater use, wasted groundwater, and recommendations for groundwater management. The groundwater potential was obtained by measuring the depth of the groundwater table, piezometric surface of artesian wells, and geoelectrical data. Water uses were obtained from calculations based on the Indonesian National Standard. The amount of wasted groundwater was obtained by comparing the groundwater potentials, groundwater uses, and groundwater discharges from unregistered artesian wells. Water transfer was assessed by selecting unregistered artesian wells with discharges able to fulfill the water demands of each village. Groundwater in the Sub-Districts of Gondang Wetan and Winongan has high potential consisting of 1 unconfined aquifer group and two confined aquifer groups. Gondang Wetan and Winongan Sub-Districts are characterized as wasting groundwater potential through unregistered artesian wells. The discharge flow of unregistered artesian wells exceeds the water needs (>100%) in Winongan and Gondang Wetan Sub-Districts. Groundwater can be managed by water transfer, closure of artesian wells, and regulation of artesian wells use. Water can be transferred to areas not covered by Artesian wells in 20 villages. The number of artesian wells used for water transfer is 20 with a discharge of 5-20 liters/s.
{"title":"Unregistered artesian Well Management in Pasuruan, Indonesia: An Attempt to Protect Groundwater Resources","authors":"H. Hendrayana, I. Riyanto, Azmin Nuha, A. R. K. Lisan","doi":"10.22146/ijg.68185","DOIUrl":"https://doi.org/10.22146/ijg.68185","url":null,"abstract":"The number of unregistered artesian wells increases every year in the northern slopes of Bromo Volcano, Pasuruan. Artesian wells are used for domestic needs and agricultural irrigation but are not followed by environmentally sound groundwater use. The purpose of this study is to assess the potential for groundwater, groundwater use, wasted groundwater, and recommendations for groundwater management. The groundwater potential was obtained by measuring the depth of the groundwater table, piezometric surface of artesian wells, and geoelectrical data. Water uses were obtained from calculations based on the Indonesian National Standard. The amount of wasted groundwater was obtained by comparing the groundwater potentials, groundwater uses, and groundwater discharges from unregistered artesian wells. Water transfer was assessed by selecting unregistered artesian wells with discharges able to fulfill the water demands of each village. Groundwater in the Sub-Districts of Gondang Wetan and Winongan has high potential consisting of 1 unconfined aquifer group and two confined aquifer groups. Gondang Wetan and Winongan Sub-Districts are characterized as wasting groundwater potential through unregistered artesian wells. The discharge flow of unregistered artesian wells exceeds the water needs (>100%) in Winongan and Gondang Wetan Sub-Districts. Groundwater can be managed by water transfer, closure of artesian wells, and regulation of artesian wells use. Water can be transferred to areas not covered by Artesian wells in 20 villages. The number of artesian wells used for water transfer is 20 with a discharge of 5-20 liters/s. ","PeriodicalId":52460,"journal":{"name":"Indonesian Journal of Geography","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42548161","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}
Mahat Hanifah, Sumayyah Aimi Mohd Najib, S. B. Norkhaidi, Nurul Hidayah Baharuddin
Science, Technology, Engineering, and Mathematics (STEM) subjects refer to school education policies and curriculum options to increase competitiveness in science and technology for students. Geography connects STEM disciplines with the application of geographical technology and tools, which can better understand cross-disciplinary phenomena to address critical problems. This study was carried out to validate the construct of the knowledge and skills in a geography STEM education instrument among prospective teachers in Malaysia. The respondents consisted of 400 students of semesters one to eight from the Bachelor of Education in Geography program, Universiti Pendidikan Sultan Idris, Perak, Malaysia, who were selected using a simple random sampling technique. The constructs studied were the knowledge and skills in geography STEM education. The data were analyzed descriptively and inferentially using exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) for item component grouping. The analysis results showed that the reliability value of Cronbach's alpha was at a high classification, which exceeded 0.70. The result of the EFA showed two components generated from the knowledge construct: STEM Knowledge and Applied Knowledge, and one component from the skill construct known as STEM Skill. Regarding the measurement model, CFA results showed that the solution was suitable and acceptable based on the suggested indicators. Therefore, the 25-item measurement model developed is suitable to measure the knowledge and skills in geography STEM education among prospective teachers in Malaysia.
{"title":"Construct Validity of the Knowledge and Skills in a Geography STEM Education Instrument among Prospective Teachers: Confirmatory Factor Analysis","authors":"Mahat Hanifah, Sumayyah Aimi Mohd Najib, S. B. Norkhaidi, Nurul Hidayah Baharuddin","doi":"10.22146/ijg.47486","DOIUrl":"https://doi.org/10.22146/ijg.47486","url":null,"abstract":"Science, Technology, Engineering, and Mathematics (STEM) subjects refer to school education policies and curriculum options to increase competitiveness in science and technology for students. Geography connects STEM disciplines with the application of geographical technology and tools, which can better understand cross-disciplinary phenomena to address critical problems. This study was carried out to validate the construct of the knowledge and skills in a geography STEM education instrument among prospective teachers in Malaysia. The respondents consisted of 400 students of semesters one to eight from the Bachelor of Education in Geography program, Universiti Pendidikan Sultan Idris, Perak, Malaysia, who were selected using a simple random sampling technique. The constructs studied were the knowledge and skills in geography STEM education. The data were analyzed descriptively and inferentially using exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) for item component grouping. The analysis results showed that the reliability value of Cronbach's alpha was at a high classification, which exceeded 0.70. The result of the EFA showed two components generated from the knowledge construct: STEM Knowledge and Applied Knowledge, and one component from the skill construct known as STEM Skill. Regarding the measurement model, CFA results showed that the solution was suitable and acceptable based on the suggested indicators. Therefore, the 25-item measurement model developed is suitable to measure the knowledge and skills in geography STEM education among prospective teachers in Malaysia. ","PeriodicalId":52460,"journal":{"name":"Indonesian Journal of Geography","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45303146","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}
River flow discharge is generally measured by multiplying the cross-sectional river area at the measurement point with the flow velocity. However, this approach cannot be used for planning needs which involves knowing the changes in discharge values at all times, which are directly affected by the variations in weather conditions and catchment area systems. This is necessary because planning errors usually lead to unsustainable and interrupted operations. It is possible to determine the changes in the river discharge values using the rainfall-runoff modelling technique through the hydrograph output of the model. Therefore, this study used hydrological modelling techniques to obtain a watershed's spatial and temporal river flow discharge. This involved using parameters such as watershed area, curve number representing land use and soil type, time lag as the delay between maximum rainfall and the occurrence of peak discharge, and the initial abstraction that considers all the losses before the runoff occurred. Moreover, rainfall data were obtained from an ARR station installed around the watershed area, while water level data were retrieved through an AWLR station installed in the river at the debit measurement point. The model was analyzed using HEC-HMS software, while the dependable discharge for power plants was analyzed using the flow duration curve method. The results showed that the rainfall-runoff hydrological modelling technique applied to the Taludaa-Gorontalo sub-watershed could ensure the continuous and sustainable operation of the hydroelectric power plant.
{"title":"River Flow Modelling for Sustainable Operation Of Hydroelectric Power Plant in the Taludaa-Gorontalo Watershed","authors":"Sardi Salim, Muchlis Polin","doi":"10.22146/ijg.64627","DOIUrl":"https://doi.org/10.22146/ijg.64627","url":null,"abstract":"River flow discharge is generally measured by multiplying the cross-sectional river area at the measurement point with the flow velocity. However, this approach cannot be used for planning needs which involves knowing the changes in discharge values at all times, which are directly affected by the variations in weather conditions and catchment area systems. This is necessary because planning errors usually lead to unsustainable and interrupted operations. It is possible to determine the changes in the river discharge values using the rainfall-runoff modelling technique through the hydrograph output of the model. Therefore, this study used hydrological modelling techniques to obtain a watershed's spatial and temporal river flow discharge. This involved using parameters such as watershed area, curve number representing land use and soil type, time lag as the delay between maximum rainfall and the occurrence of peak discharge, and the initial abstraction that considers all the losses before the runoff occurred. Moreover, rainfall data were obtained from an ARR station installed around the watershed area, while water level data were retrieved through an AWLR station installed in the river at the debit measurement point. The model was analyzed using HEC-HMS software, while the dependable discharge for power plants was analyzed using the flow duration curve method. The results showed that the rainfall-runoff hydrological modelling technique applied to the Taludaa-Gorontalo sub-watershed could ensure the continuous and sustainable operation of the hydroelectric power plant.","PeriodicalId":52460,"journal":{"name":"Indonesian Journal of Geography","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43019502","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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