Gis-based Optimization For The Locations Of Sewagetreatment Plants And Sewage Outfalls - A Case Study Of nansha District In Guangzhou City, China

摘要

Based on GIS technology, eco-suitability evaluation method integrating economic, social and ecological factors is employed to optimize the locations of the sewage treatment plants and outfalls in this paper. The ecological indices considering eco-sensitivity areas as key elements of the integrated evaluation system are allotted to the water subsystem, riparian zone subsystem, and land subsystem. A novel integrated eco-suitability evaluation index system encompassing ten criteria and fifteen indices is established to generate the distributed eco-suitability map of the concerned areas and determine the possible locations of sewage treatment plants and sewage outfalls according to the eco-suitability levels. With the case study of Nansha District in Guangzhou City, China, 212 km~2 areas of land are found to be suitable for locating the sewage treatment plants, 87 km~2 areas of water suitable for sewage release, and 6 km~2 area of riparian zone unsuitable for sewage outfalls.