The Study of Potential Retention Ponds in Samudra University to Meet Raw Water Demand and Flood Control

Abstract

This study aimed to evaluate the potential locations and volume capacities of retention ponds at Universitas Samudra (Unsam) to reduce flood discharge, provide raw water supply, and ensure water quality. The experiment was carried out to support the concept of a smart and green campus at Unsam. Water availability was calculated using the FJ Mock model, while water demand was projected based on the number of users. The retention ponds capacity for flood control and raw water availability was assessed using the HEC-HMS model. Water quality testing, including physical, chemical, and biological parameters, was conducted at the BTKLPP Class I Medan laboratory. The results showed that water demand at Unsam was 3 m3/day, which could be met by the reliable discharge of 16,344.93 m3/day. Although the existing reservoir retention ponds, with a volume of 509,788.80 m3, contributed to flood discharge reduction, the quality did not meet the required standards due to high concentrations of Total Coliform and Escherichia Coli. However, Cotkala-Unsam retention ponds provided 103,596.96 m3 of water with quality that met acceptable limits.