Reservoir Management Analysis of Water Quality and Pollution Load in Jakarta

Abstract

Jakarta as the Capital City of Indonesia has a high level of population growth. Hence, urban infrastructure movements have developed automatically. This implies some open spaces such as reservoirs are poorly managed. Reservoirs as one of blue open spaces (BOS) can function as a water catchment area to mitigate flooding during the rainy season, and drought during the dry season. Combating the reservoirs, the DKI Jakarta Government has taken action by revitalizing several untreated reservoirs. Therefore it is necessary to assess the water quality and pollution load on the reservoir. One of the supporting factors to maintain water quality and pollution load of the reservoir is to develop a robust reservoir management plan to revitalize their sustainable function. The reservoir management plan is based on the assessment of water quality and pollution load on three reservoirs in Jakarta. The formulation of reservoir management plan starts with evaluating the reservoir water quality using the Storet Method. The results of reservoir water quality based on physical parameters are in the range of class A (very good category) and B (Good Category), while based on chemical and biological parameters are in the range of class C (quite good category) and D (bad category). The results obtained from all parameters of reservoir water quality evaluation are in class D (bad category) for the three reservoirs. Further analysis was identifying the level of pollution by using the pollution index method. The result shows those three reservoirs are on heavily polluted level. Based on SWOT analysis for water quality and pollution load of the reservoir, the total score for both internal and external factors are 2.39 and 2.47, so it shows V quadrant that indicates hold and maintain strategy position and produce 8 alternatives as the result.