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유전자알고리즘을 이용한 강우강도식 매개변수 추정에 관한 연구 1 : 기존 매개변수 추정방법과의 비교
김태순,신주영,김수영,허준행 한국수자원학회 2007 한국수자원학회논문집 Vol.40 No.10
현재 국내에서 사용되고 있는 Talbot, Sherman, Japanese형 강우강도식은 매개변수추정이 용이하다는 장점이 있지만, 이원환 등(1993)과 허준행 등(1999)이 개발한 강우강도식에 비하여 정확도가 떨어지며 재현기간을 고려할 수 없다는 단점이 있다. 본 연구에서는 매개변수 추정상의 어려움 때문에 널리 사용되지 않는 허준행 등(1999)이 제안한 강우강도식의 매개변수를 유전자알고리즘을 이용하여 추정하는 방법을 제시하였다. 기상청 22개 지점 The intensity-duration-frequency (IDF) curves by Talbot, Sherman and Japanese type formulas are widely used in South Korea since the parameters are easily estimated. However, these IDF curves' accuracies are relatively worse than those of the IDF curves d
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玄武岩 洪積臺地 土壤과 河海混成 沖積土에서의 K^+ Langmuir 吸着特性 比較硏究
金台淳 건국대학교 1986 學術誌 Vol.30 No.2
A study on the Langmuir adsorption isotherm for K+ was carried out to evaluate characteristic K+ adsorption on the four series of soils. The soils used for the work were the basaltic diluvial terrace soils of Dongsong and Paiu series which are distributed on along with the Han tan river and the other soils were the fluvio-marine deposits, Mangyeong and Sadu series. The former is mostly distributed on the west coastal regions and the latter is on the delta area of the Nak dong river and the estuaries. The Langmuir adsorption maxima(LAM) for K+ in terms of meq 100G-1 are in the order of Dongsong(2.72)>Paju(2.51)> Mangyeong(1.60)>Sadu (1.32). The higher contents of the clay and the organic matter are primarily attributed to showing higher values of the LAM for K+ in both the basaltic soils. The Langmuir constant related to the binding strength for K+ is also shown higher values as compared to those values of Mangyeong and Sadu series soils. The types and the quantities of the dominant clay minerals in four soils are considered to be caused for differences in the K+ binding affinity on the soils. The dominant clay minerals in both Dongsong and Paju series soils are 1.45nm minerals(Vermiculite etc.) and 1.0nm minerals(Hydrous mica and illite), on the other hand, for Mangyeung and Sadu series halloysite and kaolinite are dominant respectively. Therefore, the structures, the charge densities, the extent of the wedge zone, and the moisture content of the minerals in the soils are responsible to bring about differences in the K+ binding strength and have resulted in showing different values of the LAM for K+. An emphasis is like to be placed on the significance of the LAM values for K+ in the case of the potassium fertilization practices.
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