http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
개별검색 DB통합검색이 안되는 DB는 DB아이콘을 클릭하여 이용하실 수 있습니다.
통계정보 및 조사
예술 / 패션
<해외전자자료 이용권한 안내>
- 이용 대상 : RISS의 모든 해외전자자료는 교수, 강사, 대학(원)생, 연구원, 대학직원에 한하여(로그인 필수) 이용 가능
- 구독대학 소속 이용자: RISS 해외전자자료 통합검색 및 등록된 대학IP 대역 내에서 24시간 무료 이용
- 미구독대학 소속 이용자: RISS 해외전자자료 통합검색을 통한 오후 4시~익일 오전 9시 무료 이용
※ 단, EBSCO ASC/BSC(오후 5시~익일 오전 9시 무료 이용)
It may be difficult to make the exact estimates of peak discharge of a flood and to establish the proper measurement for the flood protection since water stages or discharges have been rarely measured at small mountainous basins. The aim of this study is to propose a methodology of the flood runoff analysis in steep mountainous basins,and the analysis basin is the Jasa valley in Chungju city. Analyzing the spatial pattern of the rainfall in 6/30/1994∼7/1/1994, the seasonal rainy front was tied up in the whole central district,and only the rainfall center was moving from the northern Chungbuk province to the northern Kyongbuk province and caused heavy storm. As a result, the amounts of the rainfall showed a lot of difference even in the same basin. The heavy storm started around 20 o'clock,6/30/1994. Analyzing the temporal pattern with the Huff method the 52.5% of the rainfall was concentrated on the 3rd quartile. Considering that the purpose of this study is the flood runoff analysis in the steep mountainous basins, the Jasa valley basin was divided into 3 sub-basins and the analysis point was 3 points. With the rainfall data measured by the 10 minutes, the flood runoff also was calculated by as many minutes. Using the SCS model,the excess rainfall was calculated. The flood runoff of sub-basins was estimated by the Clark model, and the channel routing was carried out by the Muskinggum model.
The purpose of this study is to propose a model of computing storm water runoff from small urban drainage areas in Korea. To simulate the mechanism of runoff in small urban watersheds, the ILLUDAS(Illinois Urban Drainge Area Simulator) model and the Rational Formula were used in this study. The Rational Formula can be used only for computing peak discharges in small urban areas. the transferability of ILLUDAS model to Korean small watersheds and significant factors that could affect its application were examined through the analysis of the hydrographs generated from runoff simulations, and ILLUDAS model was selected as fit model to be applied to small urban areas.
For the flood disaster analysis of the Yogak valley sustained much flood damage from June 30, 1994 to July 1, hydrologic analysis is carried out. In this analysis, models of rainfall frequency analysis are classified to following models : Two-Parameter Lognormal, Three-Parameter Lognormal, Pearson Type III, Log-Pearson Type III and Extremal Type I distribution. SCS curve number method is used at the estimation of excess rainfall. Muskingum model is used at the channel routing. Rational formula, Modified Kajiyama, Clark and SCS model are applied at the rainfall-runoff analysis in subbasins.
The design and operation of water resource systems are affected to a great extent by the uncertainty of future events. When water was supplied under uncertainty, the analysis of water economics on the optimal alternatives was carries out by applying Dynamic Programing and bayesian Decision theory. Improved TPM model was applied in the determination of the relationship of reservoir storage, wafer supply and probability.
The HEC-RAS model is applied to calculate hydraulic characteristics in the lower reach of Dong river dam from Youngweol 2 station to Geoun bridge. The model is designed to perform one-dimensional hydraulic calculations for an environment improvement plan in a full network of natural and constructed channels, and is an integrated system of software, designed for interactive use in a multi-tasking, multi-user network environment. The system is comprised of a graphical user interface(GUI), separate hydraulic analysis components, data storage and management capabilities, graphics and reporting facilities. The model provides several added capabilities including the option to import and utilize three-dimensional(3-D) river reach and cross sectional data from a data exchange file.
The purpose of this study is to improve the present methodology for the stochastic determination of storage capacity of an impounding reservior. TPM model presented in this paper is belived to be rational in that probabilities of reservior is to disigned for various water supply rates, or storage capacities. The monthly flow are used to derive reservior capacity-yield-probability curves at Norumok gauging station in Talchon river basin.
This study aims at the hydraulic examination of Taejeon stream conveyance by HEC-2 model. HEC-2 model used in this study is developed for calculating water surface profiles for steady and gradually varied flow in natural or man-made channels. The data needed to perform these computations inculde flow regime, starting elevation, discharge, loss coefficients, cross section geometry and reach lengths in Tajeon stream. The computational procedure is based on the solution of the one-dimensional energy equation with energy loss due to friction evluated with Manning's equation. The model will be used for application in floodplain management and water quality modeling. Also, capabilities are available for assessing the effects of channel improvements and levees on water surface profiles.
This study aims at the calculation of river hydraulic characteristics which need to a stream improvement plan in the lower reach of Yodo stream. For rainfall-runoff analysis, probable rainfall is estimated by the frequency factor method,and effective rainfall is calculated by the SCS method. Probable flood discharge is calculated by the area-routing method at Yodo stream estuary. The HEC-2 model was used to calculate water surface profiles for steady, gradually varied flow,and was estimated the effects on water surface profiles of channel improvement and levees as well as the presence of bridges or other structures in the floodplain at Yodo stream by the model.
For the flood runoff analysis of mountainous small basins, hydrologic analysis is carried out, and analysis area is the Yogak valley basin in Chungju City sustained much flood damage from June 30, 1994 to July 1. In analysis, SCS curve number method is used at the estimation of excess rainfall. Clark model and SCS model is applied at the rainfall-runoff analysis in sub-basins, and Muskingum model is used at the channel routing.