Groundwater resource potential is the nation’s primary freshwater reserve and accounts for a large portion of potential future water supply.This study focused on quantifying the groundwater resource potential of the ...Groundwater resource potential is the nation’s primary freshwater reserve and accounts for a large portion of potential future water supply.This study focused on quantifying the groundwater resource potential of the Upper Gilgel Gibe watershed using the water balance method.This study began by defining the project area’s boundary,reviewing previous works,and collecting valuable primary and secondary data.The analysis and interpretation of data were supported by the application of different software like ArcGIS 10.4.1.Soil water characteristics of SPAW(Soil-plant-air-water)computer model,base flow index(BFI+3.0),and the water balance model.Estimation of the areal depth of precipitation and actual evapotranspiration was carried out through the use of the isohyetal method and the water balance model and found to be 1664.5 mm/a and 911.6 mm/a,respectively.A total water volume of 875829800 m^(3)/a is estimated to recharge the aquifer system.The present annual groundwater abstraction is estimated as 10150000 m^(3)/a.The estimated specific yield,exploitable groundwater reserve,and safe yield of the catchment are 5.9%,520557000 m^(3)/a,and 522768349 m^(3)/a respectively.The total groundwater abstraction is much less than the recharge and the safe yield of the aquifer.The results show that there is a sufficient amount of groundwater in the study area,and the groundwater resources of the area are considered underdeveloped.展开更多
Due to growing demand and reduction of water resources and increasing pollution of water,driven by dramatic population and economic growth, arid and semi-arid land's imminent water problems are nowadays aggravatin...Due to growing demand and reduction of water resources and increasing pollution of water,driven by dramatic population and economic growth, arid and semi-arid land's imminent water problems are nowadays aggravating. This study aims to determine the most appropriate management strategies for balancing the Abhar plain aquifer using the SWOT coupled with AHP technique. The results indicate that weaknesses prevail over strengths as well as threats over opportunities. The placement in the quarter of weaknesses-threats with a defensive strategy indicates the critical condition of the Abhar plain aquifer. The most appropriate solutions to achieve the goal of balancing the groundwater were prioritized by AHP method. According to results, improper management of water consumption with a weight of 72.5% is the most destructive factor in reducing groundwater resources. Among the types of consumption, the effect of an agricultural factor carries a weight of 74.2%. The exploitation of illegal wells, overdraft of exploitation license provisions of wells, reduction of precipitation and traditional irrigation methods were selected as the destructive factors causing the deteriration of groundwater resources. Also, with filling the illegal wells,changing the type of cultivation and greenhouse crops cultivation, installing a smart water meter,observance the provisions of the water exploitation license, implementing integrated pressurized irrigation systems, benefiting from suitable climatic conditions and geographical location for cultivating and developing the low-water use species and industries and on the other hand, with implementing artificial recharge to control the surface water resources and reduce abstraction from groundwater aquifers, the adverse trend of Abhar Plain groundwater resources can be controlled.展开更多
Groundwater recharge is a critical hydrologic component that determines groundwater availability and sustainability.Groundwater recharge estimation can be performed in a variety of ways,ranging from direct procedures ...Groundwater recharge is a critical hydrologic component that determines groundwater availability and sustainability.Groundwater recharge estimation can be performed in a variety of ways,ranging from direct procedures to simulation models.The optimal strategy for recharge estimation depends on several factors,such as study objectives,climatic zones,hydrogeological conditions,data availability,methodology,and temporal and spatial constraints.Groundwater recharge is influenced by uncertainties in weather and hydrology.This study discusses conventional recharge estimation techniques and their application for optimal recharge calculation,and it also offers an overview of recent advances in recharge estimation methods.Most methods provide direct or indirect estimation of recharge across a small region on a point scale for a shorter time.With recent technological advancements and increased data availability,several advanced computational tools,including numerical,empirical,and artificial intelligence models,have been developed for efficient and reliable computation of groundwater recharge.This review article provides a thorough discussion of the techniques,assumptions,advantages,limitations,and selection procedures for estimating groundwater recharge.展开更多
基金Jimma University for its support during the research work
文摘Groundwater resource potential is the nation’s primary freshwater reserve and accounts for a large portion of potential future water supply.This study focused on quantifying the groundwater resource potential of the Upper Gilgel Gibe watershed using the water balance method.This study began by defining the project area’s boundary,reviewing previous works,and collecting valuable primary and secondary data.The analysis and interpretation of data were supported by the application of different software like ArcGIS 10.4.1.Soil water characteristics of SPAW(Soil-plant-air-water)computer model,base flow index(BFI+3.0),and the water balance model.Estimation of the areal depth of precipitation and actual evapotranspiration was carried out through the use of the isohyetal method and the water balance model and found to be 1664.5 mm/a and 911.6 mm/a,respectively.A total water volume of 875829800 m^(3)/a is estimated to recharge the aquifer system.The present annual groundwater abstraction is estimated as 10150000 m^(3)/a.The estimated specific yield,exploitable groundwater reserve,and safe yield of the catchment are 5.9%,520557000 m^(3)/a,and 522768349 m^(3)/a respectively.The total groundwater abstraction is much less than the recharge and the safe yield of the aquifer.The results show that there is a sufficient amount of groundwater in the study area,and the groundwater resources of the area are considered underdeveloped.
文摘Due to growing demand and reduction of water resources and increasing pollution of water,driven by dramatic population and economic growth, arid and semi-arid land's imminent water problems are nowadays aggravating. This study aims to determine the most appropriate management strategies for balancing the Abhar plain aquifer using the SWOT coupled with AHP technique. The results indicate that weaknesses prevail over strengths as well as threats over opportunities. The placement in the quarter of weaknesses-threats with a defensive strategy indicates the critical condition of the Abhar plain aquifer. The most appropriate solutions to achieve the goal of balancing the groundwater were prioritized by AHP method. According to results, improper management of water consumption with a weight of 72.5% is the most destructive factor in reducing groundwater resources. Among the types of consumption, the effect of an agricultural factor carries a weight of 74.2%. The exploitation of illegal wells, overdraft of exploitation license provisions of wells, reduction of precipitation and traditional irrigation methods were selected as the destructive factors causing the deteriration of groundwater resources. Also, with filling the illegal wells,changing the type of cultivation and greenhouse crops cultivation, installing a smart water meter,observance the provisions of the water exploitation license, implementing integrated pressurized irrigation systems, benefiting from suitable climatic conditions and geographical location for cultivating and developing the low-water use species and industries and on the other hand, with implementing artificial recharge to control the surface water resources and reduce abstraction from groundwater aquifers, the adverse trend of Abhar Plain groundwater resources can be controlled.
文摘Groundwater recharge is a critical hydrologic component that determines groundwater availability and sustainability.Groundwater recharge estimation can be performed in a variety of ways,ranging from direct procedures to simulation models.The optimal strategy for recharge estimation depends on several factors,such as study objectives,climatic zones,hydrogeological conditions,data availability,methodology,and temporal and spatial constraints.Groundwater recharge is influenced by uncertainties in weather and hydrology.This study discusses conventional recharge estimation techniques and their application for optimal recharge calculation,and it also offers an overview of recent advances in recharge estimation methods.Most methods provide direct or indirect estimation of recharge across a small region on a point scale for a shorter time.With recent technological advancements and increased data availability,several advanced computational tools,including numerical,empirical,and artificial intelligence models,have been developed for efficient and reliable computation of groundwater recharge.This review article provides a thorough discussion of the techniques,assumptions,advantages,limitations,and selection procedures for estimating groundwater recharge.
