【正文】
Forestry University,Key Laboratory of Soil and Water Conservation amp。 (Beijing)entironment technology institution,Beijing 100080,China) Abstract: Now many countries and regions are lack of freshwater due to its uneven distribution on the ”s water consumption is ,accelerated urbanization causes rainwater loss and groundwater level drop,which further exacerbates water ,as a rare available water resource,has been utilized by green space in many countries including green space is a kind of rainwater harvesting and utilization measures with functions of landscaping,flo