Abstract
The population growth with its activities causes pressure on the Krukut River. Load management of pollutants that enters the river is based on the self purification of the river. This study aims to analyze the river characteristics and degradation rate of Krukut River. Krukut River which is a research location has a length of ± 9.04 km. Characteristics of Krukut River has a type of small rocky riverbed and irregular with manning coefficient from 0.035 to 0.045. The depth ranging from 0,99 - 2 m, with a current velocity from 0,3 to 1,29 m/s. Krukut River discharge at 2,873-7,889 m3/sec. Streeter Phelps modeling to find out the constant rate of degradation of Krukut River which resulted in the value of DO and BOD. The rate of increase of dissolved oxygen (Ka) with the value of Ka range of 1,586-4,542 d-1, the standard value should be 1,494 d-1. The results of degradation rate (Kd) of the study obtained values range 0,285–0,394 d-1 with a default value of 0,501 d-1. For a settling rate (Ks) the range of 0,070 d-1 –0,096 d-1 with a standard value should be 0,751 d-1 which means the precipitation process is quite slow. Keywords: pollution degradation rate, Krukut River, Streeter Phelps methode, selfpurification, water quality
Highlights
Krukut River is one of rivers in Depok that is included in the Krukut watershed
The Krukut River has become clogged with rubbish so that during the rainy season it causes flooding
Land use in the Krukut watershed is divided into 12 land use classes, namely primary, secondary forest, mixed gardens, plantations, settlements, swamps, rice fields, shrubs/ponds, ponds, open land, fields / fields, and water bodies
Summary
Krukut River is one of rivers in Depok that is included in the Krukut watershed. Krukut River has ± 48 km in length upstream from Situ Citayam Bogor and merges at Ciliwung River which enter into Jakarta Bay. The ability of a river to recover from pollution depends on the size of the river and the rate of river water flow and the volume and frequency of incoming waste. The ability of a river to recover itself from pollution is influenced by (1) the flow rate of river water, (2) related to the type of pollutants that enter the body of water. Steeter Phelps' findings show that when pollution enters a body of water that originally had a DO saturated level, the Ds of dissolved oxygen content from the river immediately thawed with an initial deficit, Do. Curve A represents a scenario where the polluted river recovers without passing anaerobically (DO = 0). A complete understanding of the mechanism of self-purification can be obtained This mathematical model is very helpful for studying oxygen in rivers. Some non-biodegradable and acidic wastes have been found to interfere with the river's automatic purification process (Omole, 2016)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
