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http://dx.doi.org/10.3741/JKWRA.2005.38.8.665

The Evaluation of Pollutant Removal Efficiencies by Sedimentation Basin Types constructed at the Inlets of Irrigation Reservoirs  

Jang, Jeong-Ryeol (Rural Research Institute of KARICO)
Choi, Sun-Hwa (Rural Research Institute of KARICO)
Nam, Gui-Sook (Rural Research Institute of KARICO)
Kwun, Soon-Kuk (Dept. of Landscape Architecture and Rural System Engrg. Seoul National Univ)
Publication Information
Journal of Korea Water Resources Association / v.38, no.8, 2005 , pp. 665-674 More about this Journal
Abstract
The aim of this study is to evaluate 3 types of sedimentation basins: dredging, shield skirt and auxiliary dam, constructed at inlets of two irrigation reservoir and to estimate the most beneficial type and fitted size, SAR(surface to area ratio), for pollutant removal efficiency(RE). For this, RE of major water quality items and change of physicochemical properties in sediments before and post construction of sedimentation basin(SB) were investigated. RE depended on SB types, water quality items and survey times with wide range from $-87\%$ to $92\%$. Long term overall removal efficiency by ROC(regression of concentration) method were $18\%$ in dredging, $29\%$ in shield skirt and $42\%$ in auxiliary dam type. There was a change of physicochemical properties in sediments at auxiliary dam type, while a slight change at dredging and shield skirt type. In comparison to RE, SAR and hydraulic retention time at 3 types of SB, auxiliary dam type was the most beneficial one. Thus, it is recommended that SB would be constructed in completely separated structure from water body of a reservoir with SAR ranged from 0.7 to $1.0\%.$
Keywords
sedimentation basin; pollutant removal efficiency; surface to area ratio; retention time; irrigation reservoir;
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Times Cited By KSCI : 2  (Citation Analysis)
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