LID coupled design of drainage model using GIS and SWMM

Abstract

ABSTRACT Urbanization creates developed catchment and generates peak flows in a short time. Upgradation of the existing drainage system to accommodate those altered flows have become a challenging task. As a result, implementation of LIDs in urban areas, nowadays, becomes a traditional solution to mitigate urban runoff issues. However, the integration of LIDs in urban drainage design still have not yet been fully investigated. In this paper, the LID coupled drainage system is designed for Aurangabad city (Maharashtra State, India) by using SWMM. Design of drainage model has been classified into two groups as a conventional drainage system and a system with low impact development (LID) to investigate the performance of the LID coupled drainage model. The results of the model simulation show that a combination of at least two or more LID implementation is necessary for satisfactory results. The finding of the study shows that RWH is more effective in highly urbanized areas, whereas, pervious pavement gives satisfactory results in moderately urbanized areas. Also, LID practices can effectively reduce the pressure on the urban drainage system if two or more LIDs are coupled together. Therefore, Simulation results suggest implementing a drainage system with the implementation of pervious pavement and RWH. Abbreviations: AMC: Aurangabad Municipal Corporation; BMPs: Best Management Practices; CPHEEO: Central Public Health and Environmental Engineering Organization; GIS: Geographic Information System; IDF: Intensity-Duration-Frequency; IRC: Indian Road Congress; LID: Low Impact Development; LULC: Land Use Land Cover; RWH: Rainwater Harvesting; SWAT: Soil and Water Assessment Tool; SWMM: Storm Water Management Model; US EPA: United States Environmental Protection Agency