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Soemarno Soemarno
Department of Soil Science, Faculty of Agriculture, University of Brawijaya, Malang, Indonesia
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management

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Domestic Wastewater Contribution to Water Quality of Brantas River at Dinoyo Urban Village, Malang City Sonia Prilly Ismi Arum; Donny Harisuseno; Soemarno Soemarno
Indonesian Journal of Environment and Sustainable Development Vol 10, No 2 (2019)
Publisher : Graduate Program

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpal.2019.010.02.02

Abstract

Domestic wastewater from human activities in densely populated settlements could affect the quality of streamflow because its organic matter could affect the amount of oxygen in aquatic ecosystems as an impact from biological and chemical degradation processes. The main aim of this research was to analyze the contribution of domestic wastewater from Dinoyo Urban Village settlement to the water quality of Brantas River on BOD and COD concentrations. The sampling of water and respondents were taken by purposive sampling method. The water sampling using grab sample method was performed at upstream, middle, and downstream stations of the river segment. The Estimation Method by regulation was employed to calculate BOD and COD emissions. The results showed that BOD concentrations were between 12.7 to 13.627 mgl-1 and COD concentrations were between 26.677 to 28.197 mgl-1. The amount of BOD emission was 539 kg/day and COD emission was 1032 kg/day which were dominated by human activities in bathing, washing, and lavatory. It concluded that domestic wastewater from settlement contributed to the streamflow quality  by the increase on BOD and COD concentrations at each sampling points and it could not be used to its utility because it exceeded the class II of water quality standards.
Effects of Ecohydraulic Bank Stabilization Structures on Bank Stability and Macroinvertebrate Community in Surabaya River Daru Setyo Rini; Endang Arisoesilaningsih; Donny Harisuseno; Soemarno Soemarno
Indonesian Journal of Environment and Sustainable Development Vol 9, No 1 (2018)
Publisher : Graduate Program

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1567.947 KB) | DOI: 10.21776/ub.jpal.2018.009.01.04

Abstract

There were 18 accelerated erosion sites identified along 7 km of Surabaya River Fishery Sanctuary Area. A model of ecohydraulic bank stabilization was applied to reduce bank erosion in Surabaya River at Gresik Regency Indonesia. The model is combination of reprofiled and revegetated bank with rock toe reinforcement and  addition of log groynes. Various native plant species were planted and naturally grown to establish multi-strata littoral vegetation structure. This study assessed effects of ecohydraulic bank stabilization on bank morphology, near bank velocity and littoral macroinvertebrate community during September 2014 to August 2016. The study found that rock toe enforcement, log groynes and reprofiled bank slope could stabilized the eroded bank, and littoral vegetation formation reduced near bank velocity at restored sites. There were 31 families of macroinvertebrate found in Surabaya River with high abundance of moderately pollution sensitive taxa Atyidae and pollution tolerant taxa Corixidae, Chironomidae and Tubificidae. The taxa richness, diversity index and abundance of sensitive and moderately sensitive macroinvertebrate group were increased after application of ecohydraulic bank stabilization at restored area. The results shown that ecohydraulic bank stabilization structure provides multi-benefits in improving bank stabilization against erosion and providing new micro-habitats for biotic community.Keywords:  ecohydraulic bank stabilization, macroinvertebrates, riparian restoration
Co-Authors Daru Setyo Rini Donny Harisuseno Donny Harisuseno Endang Arisoesilaningsih Sonia Prilly Ismi Arum