The rapid drop in the groundwater level has raised concerns in the sustainable water management plan in many cities of the world. It is important to understand the underlying factors of such depletion. To improve know...The rapid drop in the groundwater level has raised concerns in the sustainable water management plan in many cities of the world. It is important to understand the underlying factors of such depletion. To improve knowledge of the changes in groundwater, this study investigates a long-term perspective of urbanization, and evaluates the influence of several factors including land cover, water use, and abstraction. Multi-year land cover maps are used to detect urbanization and land cover types. Hotspot analysis and correlation-regression are applied to assess the relationship between changes in groundwater and the driving factors. The investigations confirm that an extensive withdrawal of groundwater due to urbanization results in a progressive drop in the water level. However, the major industrial and commercial zone shows the consistent hotspot of groundwater depletion. The results indicate that groundwater abstraction and types of water use have a high influence on the changes in urban groundwater.展开更多
Water shortage has become one of the severest problems in the middle Heihe River Basin because of high water demand but low available water supply. This paper is oriented to provide solutions to the problem through th...Water shortage has become one of the severest problems in the middle Heihe River Basin because of high water demand but low available water supply. This paper is oriented to provide solutions to the problem through the analysis of drought. The main objectives to analyze the difference between water demand and supply in various water users in past, present (2000), and project (2010) situation, especially in agriculture, and the most important is to propose and assess a reasonable measure with the purpose of minimum drought and sustainable development. A simulation model, WAFLEX (Water Allocation Flow model in Excel) model is applied in this study to cope with water availability, distribution and requirement of various water users, and the result shows the model and the method is effective and feasible.展开更多
文摘The rapid drop in the groundwater level has raised concerns in the sustainable water management plan in many cities of the world. It is important to understand the underlying factors of such depletion. To improve knowledge of the changes in groundwater, this study investigates a long-term perspective of urbanization, and evaluates the influence of several factors including land cover, water use, and abstraction. Multi-year land cover maps are used to detect urbanization and land cover types. Hotspot analysis and correlation-regression are applied to assess the relationship between changes in groundwater and the driving factors. The investigations confirm that an extensive withdrawal of groundwater due to urbanization results in a progressive drop in the water level. However, the major industrial and commercial zone shows the consistent hotspot of groundwater depletion. The results indicate that groundwater abstraction and types of water use have a high influence on the changes in urban groundwater.
文摘Water shortage has become one of the severest problems in the middle Heihe River Basin because of high water demand but low available water supply. This paper is oriented to provide solutions to the problem through the analysis of drought. The main objectives to analyze the difference between water demand and supply in various water users in past, present (2000), and project (2010) situation, especially in agriculture, and the most important is to propose and assess a reasonable measure with the purpose of minimum drought and sustainable development. A simulation model, WAFLEX (Water Allocation Flow model in Excel) model is applied in this study to cope with water availability, distribution and requirement of various water users, and the result shows the model and the method is effective and feasible.
