Stormwater reuse for water-sensitive city – Integrated analysis of urban hydrology for efficient alternatives of Amaravati city, India

Abstract

In the present study, Amaravati, a proposed city of Andhra Pradesh, India, is identified for stormwater reuse analysis and for various efficient options for reuse. Peak runoff from the entire catchment is determined for the management of stormwater using different models such as soil and water assessment tool (SWAT), stormwater management model, and intensity–duration–frequency curves by the log Pearson Type III method. Further, the bio-retention cell low-impact development option with 60% impervious area, 60% zero depression impervious area, bio-retention cell for 40% area for each sub-catchment, and the underground stormwater network system, for part of peak runoff reduction, remaining peak runoff is considered for reuse. The remaining peak runoff is proposed to be reused for irrigation purposes (option 1), and storage retention ponds as extended detention ponds (option 2). Also, in situ storage/percolation is recommended for unaccounted stormwater within or around each premise. The findings can help to propose, implement, and maintain various stormwater reuse measures and/or practices for any city. HIGHLIGHTS The methodology adopted is novel in regard to considering urban hydrologic study as an integrated study for various stormwater reuse efficient options.; The present study is an integrated study considering climate change, water quality, and so on, and further study on various efficient options for stormwater reuse considering low-impact development and irrigation canal options is novel of its kind.;

Keywords

• reuse
• runoff
• stormwater
• water-sensitive city