Sri Wahyuningsih, Elida Novita, Muhammad Yuwan Kilmi


Dinoyo River is one of the tributaries merge into Rawatamtu Watershed. Its water quality has declined in consequence of environmental changes in the form of land use and various human activities such as settlements, agriculture, and industry. This study aims to determine the condition of Dinoyo River water quality, calculate the pollution load, determine the carrying capacity of Dinoyo River, and provide recommendations related to the water maintenance and utilization of the Dinoyo River. The condition of water quality is based on PP. RI No. 82 Th. 2001 and the carrying capacity of the river used Streeter-Phelps mathematical methods. The results of the analysis based on PP. RI No. 82 Th. 2001, the water quality of Dinoyo River is still at the standard point of class II. The maximum pollution load capacity of Dinoyo River that can be accommodated up to ± 719 Kg / day. The carrying capacity of the Dinoyo River takes 0 - 0.3 days for the degradation zone; 0.3 - 8.9 days for recovery zone; and > 8.9 days for clean water zone. The recomended use of Dinoyo River is based on the criteria of the class II water quality standard, while the maintenance effort is to raise public awareness of how to utilize river properly, implementing eco-friendly agricultural systems and home industry activities should be given more attention in order to maintain the water quality of Dinoyo river. 

Keywords : Carrying capacity, Dinoyo River, Water Quality, Pollution Load, Streeter-Phelps



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