193 Integrated Assessment of Water Resources in Zhengzhou, China

Due to frequently interaction between surface water and groundwater, water resources in Zhengzhou are assessed by an integration of surface water and groundwater, water quantity and quality and their distribution characters of quantity in different quality. The assessed results show that the average of the total amount of water resources from 1956 to 2005 in Zhengzhou is 1280.40×10⁶ m³∕year, where surface water resources is 703.60×10⁶ m³∕year, groundwater resources is 772.32×10⁶ m³∕year, and the repetitive calculation is 152.55×10⁶ m³∕year. The integrated water quality is from grade III to grade V. Apart from grade III in Yinghe zone and grade IV in Huaxia zone, the rest is of grade V. The water resources of grade III is 267.69×10⁶ m³∕year, grade IV is 416.07×10⁶ m³∕year, grade V is 246.72×10⁶ m³∕year, and worse than grade V is 349.93×10⁶ m³∕year (mostly surface water).