郑州绿地雨水资源有效利用途径研究

城市绿地对雨水的流失有显著的缓解作用，城市绿地的合理规划与建设对雨水资源的有效利用有巨大的影响。以郑州市为研究对象，基于2011年8月份TM影像，分析不同高程区间内郑州市区绿地面积、绿地斑块数量与汇水面面积的相关关系，同时结合气象观测资料，道路、公园、防护绿地分布资料等，对城市绿地对雨水资源有效利用提出合理的途径。结果表明:绿地面积、绿地斑块个数与汇水面均呈极显著正相关。因此，建议郑州市在增加绿地面积的基础上提高绿地斑块数量，在城市绿地设计多目标中实现雨水资源利用多目标，最终达到改善郑州水环境和减轻城市内涝灾害的目的。

Efficient Utilization Ways of Rainwater Resources in Greenland of Zhengzhou

Urban green space has the significant mitigation on loss of rainwater, rational planning and construction of urban green space has the huge impact on the efficient use of rainwater resources. Taking Zhengzhou City as the research example, based on the TM images of August, 2011, we analyzed satellite images to calculate the elevation range of different green area in Zhengzhou City, the number of green patches and sink surface area of the correlation coefficient, at the same time, and put forward the way on the efficient use of rainwater resources in the urban green space according to the meteorological data, roads, parks, green space protection distribution data, etc. The results showed that the green space area, the number of green patches and the collected water were very significant positive correlation. Therefore, we suggested that on the basis of increase of the green area in Zhengzhou City, number of green patches should be increased, rainwater resources use multi-objective should be realized in urban green space design multi-objective in order to improve the water environment of Zhengzhou and relieve the urban waterlog disaster.