GIS-based optimization for the locations of sewage treatment plants and sewage outfalls – A case study of Nansha District in Guangzhou City,China |
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| Authors: | YW Zhao Y Qin B Chen X Zhao Y Li XA Yin GQ Chen |
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| Institution: | 1. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;2. National Laboratory for Complex Systems and Turbulence, Department of Mechanics, Peking University, Beijing 100871, China;2. Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain;3. Department of Mathematics for Economy, Faculty of Economics, University of Valencia, 46022 Valencia, Spain;4. Laboratory of Chemical and Environmental Engineering (LEQUIA), Scientific and Technological Park, Jaume Casademont Building, Pic de Peguera 15, 17003 Girona, Spain;1. Wastewater Treatment Laboratory, Water Researches and Technologies Centre, Technopark Borj Cedria, Carthage University, Tunisia;2. University of Tunis El Manar, National Engineering School of Tunis BP N°37, Le Belvedere, 1002 Tunis, Tunisia |
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| Abstract: | 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 km2 areas of land are found to be suitable for locating the sewage treatment plants, 87 km2 areas of water suitable for sewage release, and 6 km2 area of riparian zone unsuitable for sewage outfalls. |
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