This study advances the DRASTIC groundwater vulnerability assessment framework by integrating a multi-hazard groundwater index(MHGI)to account for the dynamic impacts of diverse anthropogenic activities and natural fa...This study advances the DRASTIC groundwater vulnerability assessment framework by integrating a multi-hazard groundwater index(MHGI)to account for the dynamic impacts of diverse anthropogenic activities and natural factors on both groundwater quality and quantity.Incorporating factors such as population growth,agricultural practices,and groundwater extraction enhances the framework’s ability to capture multi-dimensional,spatiotemporal changes in groundwater vulnerability.Additional improvements include refined weighting and rating scales for thematic layers based on available observational data,and the inclusion of distributed recharge.We demonstrate the practical utility of this dynamic DRASTIC-based framework through its application to the agro-urban regions of the Irrigated Indus Basin,a major groundwater-dependent agricultural area in South Asia.Results indicate that between 2005 and 2020,54%of the study area became highly vulnerable to pollution.The MHGI revealed a 13%decline in potential groundwater storage and a 25%increase in groundwater-stressed zones,driven primarily by population growth and intensive agriculture.Groundwater vulnerability based on both groundwater quality and quantity dimensions showed a 19%decline in areas of low to very low vulnerability and a 6%reduction in medium vulnerability zones by 2020.Sensitivity analyses indicated that groundwater vulnerability in the region is most influenced by groundwater recharge(42%)and renewable groundwater stress(38%).Validation with in-situ data yielded area under the curve values of 0.71 for groundwater quality vulnerability and 0.63 for MHGI.The framework provides valuable insights to guide sustainable groundwater management,safeguarding both environmental integrity and human well-being.展开更多
淮河流域新型工业化、城镇化及农业现代化近年来高速发展,可能引发区域地下水生态环境问题,因此选取流域内的信阳市淮滨县为研究对象,在系统分析研究区水文地质条件的基础上,按照研究区实际情况,选取7个主要影响因素作为评价因子,利用Ar...淮河流域新型工业化、城镇化及农业现代化近年来高速发展,可能引发区域地下水生态环境问题,因此选取流域内的信阳市淮滨县为研究对象,在系统分析研究区水文地质条件的基础上,按照研究区实际情况,选取7个主要影响因素作为评价因子,利用ArcGIS对各评价因子进行加权叠加分析,应用DRASTIC评价模型对工作区进行地下水脆弱性评价。评价结果表明研究区内大部分地区的地下水脆弱性为较高等级,脆弱性等级为中等的地区主要为淮河以南的张庄乡一带以及王店乡的北部地区,淮滨县城区的东北部局部地区,王店乡以及期思镇的南部白露河沿线为脆弱性高等分区。The rapid development of new industrialization, urbanization and agricultural modernization in the Huaihe River Basin in recent years may lead to regional groundwater ecological and environmental problems, therefore, Huaibin County of Xinyang City in the basin was selected as the research object, and on the basis of systematic analysis of the hydrogeological conditions of the study area, seven main influencing factors were selected as evaluation factors according to the actual situation of the study area, and the weighted superimposition of the evaluation factors was carried out by using ArcGIS. ArcGIS was used to analyze the weighted superposition of the evaluation factors, and the DRASTIC evaluation model was applied to evaluate the vulnerability of groundwater in the working area. The evaluation results show that the vulnerability of groundwater in most areas of the study area is high, and the areas with medium vulnerability are Zhangzhuang Township and the northern part of Wangdian Township south of Huaihe River, the northeastern part of urban area of Huaibin County, and the area along Bailu River in Wangdian Township and the southern part of Qisi Township are the high-vulnerability sub-areas.展开更多
Groundwater vulnerability assessment is a crucial step in the efficient management of groundwater resources,especially in areas with intensive anthropogenic activities and groundwater pollution.In the present study,th...Groundwater vulnerability assessment is a crucial step in the efficient management of groundwater resources,especially in areas with intensive anthropogenic activities and groundwater pollution.In the present study,the DRASTIC method was applied using Geographic Information System(GIS)to delineate groundwater vulnerability zones in the Erbil Dumpsite area,Central Erbil Basin,North Iraq.Results showed that the area was classified into four vulnerability classes:Very low(16.97%),low(27.67%),moderate(36.55%)and high(18.81%).The southern,south-eastern and northern parts of the study area exhibited the highest vulnerability potential,while the central-northern,northern and north-western regions displayed the lowest vulnerability potential.Moreover,results of the single-parameter sensitivity analysis indicated that amongst the seven DRASTIC parameters,the unsaturated zone and the aquifer media were the most influencing parameters.In conclustion,the correlation of 25 nitrate concentration values with the final vulnerability map,assessed using the Pearson correlation coefficient,yielded a satisfactory result of R=0.72.展开更多
基金funding from the National Science Foundation(NSF Award 2114701)of the United States.
文摘This study advances the DRASTIC groundwater vulnerability assessment framework by integrating a multi-hazard groundwater index(MHGI)to account for the dynamic impacts of diverse anthropogenic activities and natural factors on both groundwater quality and quantity.Incorporating factors such as population growth,agricultural practices,and groundwater extraction enhances the framework’s ability to capture multi-dimensional,spatiotemporal changes in groundwater vulnerability.Additional improvements include refined weighting and rating scales for thematic layers based on available observational data,and the inclusion of distributed recharge.We demonstrate the practical utility of this dynamic DRASTIC-based framework through its application to the agro-urban regions of the Irrigated Indus Basin,a major groundwater-dependent agricultural area in South Asia.Results indicate that between 2005 and 2020,54%of the study area became highly vulnerable to pollution.The MHGI revealed a 13%decline in potential groundwater storage and a 25%increase in groundwater-stressed zones,driven primarily by population growth and intensive agriculture.Groundwater vulnerability based on both groundwater quality and quantity dimensions showed a 19%decline in areas of low to very low vulnerability and a 6%reduction in medium vulnerability zones by 2020.Sensitivity analyses indicated that groundwater vulnerability in the region is most influenced by groundwater recharge(42%)and renewable groundwater stress(38%).Validation with in-situ data yielded area under the curve values of 0.71 for groundwater quality vulnerability and 0.63 for MHGI.The framework provides valuable insights to guide sustainable groundwater management,safeguarding both environmental integrity and human well-being.
文摘淮河流域新型工业化、城镇化及农业现代化近年来高速发展,可能引发区域地下水生态环境问题,因此选取流域内的信阳市淮滨县为研究对象,在系统分析研究区水文地质条件的基础上,按照研究区实际情况,选取7个主要影响因素作为评价因子,利用ArcGIS对各评价因子进行加权叠加分析,应用DRASTIC评价模型对工作区进行地下水脆弱性评价。评价结果表明研究区内大部分地区的地下水脆弱性为较高等级,脆弱性等级为中等的地区主要为淮河以南的张庄乡一带以及王店乡的北部地区,淮滨县城区的东北部局部地区,王店乡以及期思镇的南部白露河沿线为脆弱性高等分区。The rapid development of new industrialization, urbanization and agricultural modernization in the Huaihe River Basin in recent years may lead to regional groundwater ecological and environmental problems, therefore, Huaibin County of Xinyang City in the basin was selected as the research object, and on the basis of systematic analysis of the hydrogeological conditions of the study area, seven main influencing factors were selected as evaluation factors according to the actual situation of the study area, and the weighted superimposition of the evaluation factors was carried out by using ArcGIS. ArcGIS was used to analyze the weighted superposition of the evaluation factors, and the DRASTIC evaluation model was applied to evaluate the vulnerability of groundwater in the working area. The evaluation results show that the vulnerability of groundwater in most areas of the study area is high, and the areas with medium vulnerability are Zhangzhuang Township and the northern part of Wangdian Township south of Huaihe River, the northeastern part of urban area of Huaibin County, and the area along Bailu River in Wangdian Township and the southern part of Qisi Township are the high-vulnerability sub-areas.
文摘Groundwater vulnerability assessment is a crucial step in the efficient management of groundwater resources,especially in areas with intensive anthropogenic activities and groundwater pollution.In the present study,the DRASTIC method was applied using Geographic Information System(GIS)to delineate groundwater vulnerability zones in the Erbil Dumpsite area,Central Erbil Basin,North Iraq.Results showed that the area was classified into four vulnerability classes:Very low(16.97%),low(27.67%),moderate(36.55%)and high(18.81%).The southern,south-eastern and northern parts of the study area exhibited the highest vulnerability potential,while the central-northern,northern and north-western regions displayed the lowest vulnerability potential.Moreover,results of the single-parameter sensitivity analysis indicated that amongst the seven DRASTIC parameters,the unsaturated zone and the aquifer media were the most influencing parameters.In conclustion,the correlation of 25 nitrate concentration values with the final vulnerability map,assessed using the Pearson correlation coefficient,yielded a satisfactory result of R=0.72.
