Laju Deoksigenasi dan Reoksigenasi Sungai Bedadung (Studi Kasus di Desa Tamansari dan Desa Lojejer Jember)

Bedadung stream is one of the biggest rivers that passes through Jember Region, East Java, Indonesia. Due to land uses caused by surrounding civilization, many of drainage channels throw in nonpoint source pollutants from industrial, domestic, and agricultural activities to river. DO and BOD are two of most important parameters reflecting ecological health of river. BOD reflects the number of organik pollutant contained water. DO concentration is controlled by a number of physical, chemical and biological processes, such as deoxygenation and reoxygenation. The aim of this research to analyze deoxygenation and reoxygenation rates of Bedadung River segment Tamansari and Lojejer villages, Jember. The primary data were obtained by measuring of stream flow and water quality parameters (temperature, DO and BOD) at 4 observed stations (BDG01, BDG02, BDG03, and BDG04). The result showed that stream flow was 6.466 m3/det, and its water quality such as DO 7.008 mg/L dan BOD 0.928 mg/L. The values of deoxygenation and reoxygenation rate were 0.975 mg/L.day and 1.051 mg/L.day, sequentially. The reoxygenation rate value was higher than deoxygenation value, concluded that Bedadung stream was able to increase its dissolve oxygen content and attempt self purification.

Ecological revetments for enhanced interception of nonpoint source pollutants: a review

The riparian zone is a transitional zone between aquatic and terrestrial ecosystems and is also the only passage for surface runoff to enter a river. The role of the riparian zone as a means for intercepting nonpoint source (NPS) pollution has been receiving growing attention and, in recent years, various ecological revetments have been developed to strengthen the interception of runoff pollutants. This research reviews the current development of ecological revetments in terms of NPS pollution control with a focus on the key functions and optimization methods of vegetation allocation and substrate configuration. Future research on improving the ecological revetments for enhanced NPS pollution control are also highlighted. This review is intended to provide a technical reference for the optimization and implementation of ecological revetment projects, and possible pathways for the effective control of NPS pollution.