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Abstract
Abstract Water shortage and water pollution are two prominent issues in North China. Understanding hydrological cycle and water quality changes in response to pollution control measures is fundamental for a better water management there. Using coupled MIKE SHE/MIKE 11 modeling, various hydrological components in Yanghe Basin in a semiarid area of North China were quantified for three typical hydrological years and concentrations of COD and TP in a national monitoring section of Yanghe were evaluated with/without pollution control measures. The modeling results show that the underground water storage of Yanghe Basin becomes depleted due to evapotranspiration compensation and groundwater utilization regardless of hydrological condition, indicating an unsustainable in-situ water resource utilization. Water quality goals set for Yanghe (COD ≤ 20 mg/L and TP ≤ 0.2 mg/L) can hardly be achieved if pollution control measures are not taken, especially for a dry hydrological year. Depending on hydrological conditions, non-point source control technology-related projects in a 109-km2 village and a 7-km river-channel wetland in mainstream of Yanghe will have a positive effect or negligible effect on water quality improvement. To meet water quality goals, implementation of three wetlands is an effective and economic way.
Highlights
North China, including Capital City Beijing, Municipality Tianjin, Hebei Province, Shanxi Province and Inner Mongolia Autonomous Region, plays a very important role in China in terms of politics, economy and culture
Several pilot demonstration projects (Figure 1(b)) sponsored by the National Water Program are under construction in Zhangjiakou City, in order to cope with an increase in pollutant discharge to the Yanghe (Figure 2) under increasingly strict water quality requirements
The Ens and PBIAS values are considered as acceptable, which supports the further application of the constructed MIKE SHE/MIKE 11 model in the Yanghe Basin
Summary
North China, including Capital City Beijing, Municipality Tianjin, Hebei Province, Shanxi Province and Inner Mongolia Autonomous Region, plays a very important role in China in terms of politics, economy and culture. It is located within the semiarid and semi humid temperate climate zones, with droughts occurring more frequently than floods, and faces a serious water shortage. The facts indicate that the impact of human disturbance on the water cycle is considerable. Qualification of current hydrological water balance components can help to better understand the water cycle and water resource status, lighting the way for a better water resource management and water shortage solution
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