유역형상과 오염부하배출 특성을 고려한 유달계수 산정
Estimating the Pollution Delivery Coefficient with Consideration ofCharacteristics Watershed Form and Pollution Load Washoff
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Abstract
The performance of a stream water quality analysis model depends upon many factorsattributed to the geological characteristics of a watershed as well as the distribution behaviors ofpollutant itself on a surface of watershed.Because the model run has to import the pollution load from the watershed as a boundarycondition along an interface between a stream water body and a watershed, it has been used tointroduce a pollution delivery coefficient to behalf of the boundary condition of loadimportation.Although a nonlinear regression model (NRM) was developed to cope with the limitation ofa conventional empirical way, this an up-to-date study has also a limitation that it can’t beapplied where the pollution load washed off (assumed at a source) is less than that delivered(observed) in a stream.The objective of this study is to identify what causes the limitation of NRM and to suggesthow we can purify the process to evaluate a pollution delivery coefficient using many fieldobserved cases. As a major result, it was found what causes the pollution load delivered tobecomes bigger than that assumed at the source. In addition, the pollution load discharged to astream water body from a specific watershed was calculated more accurately.
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