Inflow Assessment Using Hydrologic and GIS Techniques of Macpherson Lake Watershed in Prayagraj, India

Lakes are essential for providing water, supporting tourism, and sustaining diverse ecosystems. However, the condition of major lakes in India has deteriorated due to population growth. Any strategy to rejuvenate a lake needs reliable assessment of surface runoff as inflow coming from drainage systems of lake catchment. This study combines GIS and the SCS-CN hydrological method to accurately estimate inflow as surface runoff into Macpherson Lake. Findings indicate a curve number (CN) of 87 with maximum runoff of 5.02 million cubic meters. The inflow data is vital for lake rejuvenation strategies. The results will aid in developing targeted stormwater management strategies to improve the water quality and overall sustainability.