基于Google Earth的小区域地面铺装汇水量计算方法研究

汇水面积和汇水量是多孔路面或透水路面设计的重要参数。该文基于GoogleEarch的地理信息数据，从大区域计算面雨量和小区域准确确定汇水量两个方面来计算地面铺装可能的汇水量。并以广州地区为研究对象，收集雨量站资料信息，计算面雨量；在GoogleEarth软件上标出汇水区域，可自动计算汇水面积，进而得出具体的汇水量，用于指导多孔铺装材料和结构的设计。

Calculation Method of Cacthment Rainfall of Small Regional Pavement Based on Goog le Earth

Catchment area and cacthment rainfall are important parameters of porous or permeable pavement design. Based on the GIS data in Google Earth, this article proposes a calculation method, calculating the pavement＇s capacity of catchment rainfall by calculating the areal rainfall of large region and the catchment rainfall of small region. Furthermore, taking Guangzhou as the subject, the author collects the information of rainfall data, calculates areal rainfall. Then, by marking the catchment area in Google Earth, if can automatically calculate catchment area, and finally the catchment rainfall would come out to guide the materials and structural design of porous pavement.