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http://dx.doi.org/10.17663/JWR.2017.19.1.030

Proposal for Estimation Method of the Suspended Solid Concentration in EIA  

Choo, Tai Ho (Department of Civil and Environmental Engineering, Pusan National University)
Kim, Young Hwan (Department of Civil and Environmental Engineering, Pusan National University)
Park, Bong Soo (Sun Il Engineering & Construction Co., Ltd.)
Kwon, Jae Wook (Department of Civil and Environmental Engineering, Pusan National University)
Cho, Hyun Min (Department of Civil and Environmental Engineering, Pusan National University)
Publication Information
Journal of Wetlands Research / v.19, no.1, 2017 , pp. 30-36 More about this Journal
Abstract
SS(Suspended Solid) concentration by soil erosion into river at normal and flood season should be measured. However, to present the variation of SS due to various development project such as EIA(Environmental Impact Assessment), River Master Plan, and so on, it is necessary to estimate not measure SS, but there are not exist how to estimate SS. In the present study, therefore, we propose the hydrologic method of estimating SS concentration using the results of particular frequency flood discharge and sediment discharge by RUSLE method. SS consists of silty and clay soil and colloid particle etc. However, in the present study, silty and clay soils of sediment discharge except send set up SS standards. The flow discharge to estimate SS concentration are 1~2 years for normal season, 30~100 years for flood season. Meanwhile, analysis software for probable rainfall uses Fard2006, probable rainfalls under 2-year frequency are estimated using rainfall data and frequency factor of Gumbel distribution. The results of estimating SS concentration using runoff volume by sediment and flow discharges of silty and cray soils as above method show that reliable level of SS concentration is considered in predevelopment of natural condition and under development of barren condition. Especially, SS concentration takes notice that the value of sediment discharge makes a huge difference according to channel slope, it was confirmed that the value obtained by dividing the SS concentration by the channel slope is relatively constant even though the topographical factors are different. Therefore, if the present study will be proceeded for various watersheds, it will be developed as estimation method of SS concentration.
Keywords
Environmental Impact Assessment; SS concentration; RUSLE; Hydrologic estimation; Frequency factor;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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