基于地质条件的海绵城市建设适宜性评价——以东莞市为例

Evaluation of the Suitability of Sponge City Construction Based on Geological Conditions--Taking Dongguan as an Example

以东莞市为研究对象,通过现场调研与充分收集地质调查数据,选取植被覆盖度、地形坡度、地表岩性、土壤环境质量、包气带厚度、包气带渗透性、含水层厚度和含水层渗透性等8个地质因子,采用层次分析法和GIS软件的空间叠加功能进行分析。结果表明:东莞市中地质环境适宜性好的占21.6%,适宜性较好的占0.28%,适宜性一般的占69.09%,适宜性较差的占9.03%。

This study takes Dongguan City as the object,through on-site investigation and full collection of geological survey data in the study area,eight geological factors such as vegetation coverage,topographic slope,surface lithology,soil environmental quality,thick bottom of vadose zone,permeability of vadose zone,thickness of aquifer and permeability of aquifer are selected and analyzed by using analytic hierarchy process and spatial superposition function of GIS software.The results show that 21.6%of Dongguan has good geological environment suitability and 0.28%are suitable for geological environment,69.09%of them had general suitability and 9.03%had poor suitability.