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 further provides various options for reuse. Peak runoff from the entire catchment is determined for the management of stormwater using different models such as SWAT, stormwater management model, and intensity–duration–frequency curves by the Log Person 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 to the underground stormwater network system, part of peak runoff, 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/rain gardens (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.