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장철희,김현준,조한범 한국농공학회 2006 한국농공학회 학술대회초록집 Vol.2006 No.-
The heavy storm of July 11-19, 2006, which occurred over the Southern Kangwon Province, is analyzed to investigate the hydrometeorological characteristics and frequency of occurrences of the storm. The study region is limited to the watershed area of Pyeongchang River and upstream area of Odae-cheon. Hourly rainfall data at 16 rain gauging stations in and near the Pyeongchang river basin are collected and the cumulative rainfall mass curves constructed and compared each other to judge the credibility and consistency of rainfall data at nearby stations. In order to analyze the spatially moving characteristics of rain storm the isochrones based on real time are constructed using the several fixed-percentage cumulative rainfalls at the stations. The average rainfalls of various durations are computed for Pyeongchang river and Odae-cheon, and the return period of July/2006 storm are evaluated based on the rainfall frequency.
지상강우 관측치에 의한 TRM/PR 관측치의 보정 및 SCS 유출해석 : 용담댐 유역을 대상으로
장철희,권형중,고덕구,김성준 한국수자원학회 2003 한국수자원학회논문집 Vol.36 No.4
본 연구의 목적은 TRMM/PR(Tropical Rainfall Measuring Mission/Precipitation Radar)에 의하여 관측된 공간강우분포의 수문학적 적용성을 평가하는데 있다. 이를 위하여 우선 용담댐 유역(930.38)을 대상으로 한 TRMM/PR 자료(Y)를 추출한 후, AWS (Automatic Weather Station)에 의하여 관측된 지상강우자료(X)를 공간내삽하여 작성한 분포도와 상관분석을 실시하여 TRMM/PR 자
장철희,김현준,김진택,Jang, Cheol-Hee,Kim, Hyeon-Jun,Kim, Jin-Taek 한국농공학회 2012 한국농공학회논문집 Vol.54 No.1
This study is to analyse the hydrological behavior of agricultural reservoir using CAT (Catchment hydrologic cycle Assessment Tool). The CAT is a water cycle analysis model in order to quantitatively assess the characteristics of the short/long-term changes in watershed. It supports the effective design of water cycle improvement facilities by supplementing the strengths and weaknesses of existing conceptual parameter-based lumped hydrologic models and physical parameter-based distributed hydrologic models. The CAT especially supports the analysis of runoff processes in paddy fields and reservoirs. To evaluate the impact of agricultural reservoir operation and irrigation water supply on long-term rainfall-runoff process, the CAT was applied to Idong experimental catchment, operated for research on the rural catchment characteristics and accumulated long term data by hydrological observation equipments since 2000. From the results of the main control points, Idong, Yongdeok and Misan reservoirs, the daily water levels of those points are consistent well with observed water levels, and the Nash-Sutcliffe model efficiencies were 0.32~0.89 (2001~2007) and correlation coefficients were 0.73~0.98.
지상강우 관측치에 의한 TRMM/PR 관측치의 보정 및 SCS 유출해석 : 용담댐 유역을 대상으로
장철희,권형중,고덕구,김성준 한국수자원학회 2003 한국수자원학회논문집 Vol.36 No.4
The purpose of this study is to evaluate hydrological applicability of spatially observed rainfall distribution data by the TRMM/PR (Tropical Rainfall Measuring Mission /Precipitation Radar). For this study, firstly, TRMM/PR data (Y) of the Yongdam-Dam Watershed (930.38㎢) was extracted and secondly, TRMM/PR data and the rainfall data (X) by AWS (Automatic Weather Station) were compared by executing a correlation analysis. As a result, the regression equations were deduced as two parts (under 60mm/day : Y=18.55X-0.53, over 60mm/day : Y=3.11X+51.16). SCS runoff analysis was conducted using 7 rainfall events in 1999 for Yongdam-Dam watershed and the Cheon-Cheon subwatershed for the revised TRMM/PR data. TRMM/PR data showed relative errors ranging from 19.6% to 45.6%, and from 11.3% to 38.9% for Cheon-Cheon subwatershed and Yongdam-Dam watershed, respectively. AWS data showed relative errors ranging from 0.5% to 12.8%, and from -1.6% to -10.3%, for Cheon-Cheon subwatershed and Yongdam-Dam watershed, respectively. Futher researches are necessary to evaluate the relationship between TRMM/PR data and AWS data for practical hydrological applications. 본 연구의 목적은 TRMM/PR (Tropical Rainfall Measuring Mission/Precipitation Radar)에 의하여 관측된 공간강우분포의 수문학적 적용성을 평가하는데 있다. 이를 위하여 우선 용담댐 유역(930.38㎢)을 대상으로 한 TRMM/PR자료(Y)를 추출한 후, AWS (Automatic Weather Station)에 의하여 관측된 지상강우자료(X)를 공간내삽하여 작성한 분포도와 상관분석을 실시하여 TRMM/PR 자료를 보정하는 관계식을 도출하였다(under 60mm/day : Y = 18.55X - 0.53, over 60mm/day : Y = 3.11X + 51.16). 용담댐유역 전체와 천천수위관측소 지점의 유역을 대상으로 1999년 여름의 총 7개 강우사상에 대한 SCS 직접유출량을 산정하여 봄으로써 보정된 TRMM/PR 자료의 활용방법을 검토하였다. 그 결과 실측 유출량에 대한 상대오차는 용담댐유역 전체를 대상으로 한 경우, 보정된 TRMM/PR이 11.3%~38.9%, AWS 관측치가 -1.6%~-10.3%로 나타났으며, 천천 수위관측소를 대상으로 한 경우, 보정된 TRMM/PR이 19.6%~45.6%, AWS 관측치가 0.5%~10.3%로 나타났다. 본 연구에서는 1999년도 6월~9월(총 80여 개)의 TRMM/PR 자료를 대상으로 보정식을 도출하였으나, 향후 보다 다양하고도 많은 TRMM/PR 자료를 이용하여 관계식을 보완하는 연구가 필요하다고 판단된다.