PENILAIAN PERUBAHAN KUALITAS AIR SUNGAI : APLIKASI DI SUNGAI MARTAPURA, INDONESIA

Abstract

The river in the city of Banjarmasin has received the burden of organic and inorganic pollutants from various sources, both point and non-point, which causes a decrease in water quality. This study aims to build an early warning model for changes in river water quality, using dissolved oxygen as an indicator based on the dynamic system method. Dissolved oxygen is an essential element to show changes in river water quality, as indicated by fluctuations in dissolved oxygen values. The dynamic model developed involves seven sub-models. The sub-models including sub-models 1) population 2) resident/settler waste in the research zone, 3) restaurant waste, 4) hotel waste, 5) market waste, 6) other public place waste ( education and health facilities) and 7) the burden of pollutants that interact to form a system. The most effective strategy scenario simulation to be used as a river water’s quality change assessment is the 3rd strategy scenario, including (1) cross-sectoral cooperation (2) law enforcement (3) development of WWTP, and (4) community participation. The application of this scenario will provide a decrease that has an impact on increasing DO, with an 80 percent decrease in BOD pollutant load and 73 percent of COD. These conditions will cause the quality of water bodies to be following its designation as First Class water bodies.