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박창언 ( Chang Eon Park ) 한국농공학회 2016 한국농공학회 학술대회초록집 Vol.2016 No.-
농업용 저수지의 저수율을 모의하기 위하여는 저수지 유입량, 필요수량, 강우량 등의 물수지를 통하여 이루어지는 것이 일반적이다. 그러나, 물수지 분석을 위해서는 실제로 관개되어지는 관개량이 워낙 불확실하여 신뢰성있는 저수율 변화를 모의하기에는 한계가 있다. 더구나, 기후변화 영향평가 등을 비롯한 미래의 저수지 저수율 변화를 예측하기 위하여는 기존의 저수지 물관리 관행을 포함하는 수리, 수문특성이 적절히 반영되어진 저수율 모의방법이 필요하며, 이를 위하여 월강우량 자료를 이용한 회귀분석을 실시하여 월별 저수율을 모의할 수 있는 방법을 시도하였다. 과거 30년의 저수율 변화자료와 월강우량자료를 이용하여 월강우량과 월별 저수량 변화량에 대한 회귀분석을 실시하여 일정한 회귀방정식을 구성하고, 이를 활용하여 월별로 저수율 변화를 추적해 나가는 방법을 시도하였으며, 실제 저수율 변화를 적절히 재현할 수 있는 것으로 판단되었다. Water storage rate simulation In agricultural reservoirs was performed generally by water balance analysis with inflow discharge to reservoir, water demand in paddy field and precipitation, etc. In this simulation, we faced confidence limit with uncertain real irrigation discharge. So, we tried regression analysis using monthly precipitation in order to simulate monthly reservoir storage rate change. Regression analysis was perfromed with Monthly precipitation and monthly water storage rate change for 30 years, and monthly regression equations were drawn. Monthly water storage rate was simulated properly with these equations in agricultural reservoirs.
자동계측이 이루어지는 관개용수로에서의 수위-유량관계 분석
박창언,김진택,오승태,Park, Chang-Eon,Kim, Jin-Taek,Oh, Sung-Tae 한국농공학회 2012 한국농공학회논문집 Vol.54 No.1
Stage-discharge relationship is applied to convert water level into discharge at the auto-measuring station in many irrigation canals. The stage-discharge curve is very important for reliable application for the agricultural water management system. We made results of discharge measurement at 18 stations in the irrigation canal nearby the Idong reservoir from 2010 to 2011. Stage-discharge relationships for each 18 stations were drawn considering of different hydraulic and geometrical characteristics at each stations. R-squared over 0.91 at each stations show high reliability for application of these relationships.
박창언,정하우,박승우,Park Chang-eon,Chung Ha-woo,Park Seung-woo 한국관개배수위원회 1994 한국관개배수논문집 Vol.1 No.1
Integrated water management systems are introduced that significantly help efficient operations and management of an irrigation system for paddies. They are constituted by three components: real-time monitoring viatelemetering, modeling of system operatio
박창언 ( Chang Eon Park ) 한국농공학회 2017 한국농공학회 학술대회초록집 Vol.2017 No.-
기후변화에 따른 미래의 농업용 저수지 가뭄위험을 분석하기 위하여 SSP2 시나리오를 적용하였다. 이번에 적용한 시나리오는 RCP8.5 시나리오를 기본으로 하여 중국, 일본을 포함하는 동아시아 국가들의 기후변화 적응정책들이 고려되어진 새로운 시나리오로서, SSP2/RCP85 라고 표시하는 것이 적절할 것이다. 전국의 5개 주요 농업용 저수지의 21세기 초, 중, 말기의 가뭄위험을 분석하기 위하여, 월강수량과 저수량 변화 사이의 관계를 다중회귀분석에 의하여 월별로 정의하여 월별로 저수지의 저수율을 추적할 수 있는 방법을 시도하였다. 관계식 도출을 위하여 해당 저수지의 저수율 관리자료를 활용하였으며, 인근의 강우관측소 월강수량을 수집하여 적용하였다. 월강수량과 저수량 변화 관계식이 적절한 결정계수를 가지며 도출되어져 농업용 저수지의 월별 저수율 추적은 충분히 가능한 것으로 판단되었다. 이를 이용하여 SSP2/RCP85 시나리오와 함께 적용한 결과, 21세기 중, 말기에는 매년 1,000mm 이상의 강우가 발생하여 가뭄발생 가능성은 점차 줄어드는 것으로 나타났다.
수심평균(水深平均) 2차원(次元) 수학적(數學的) 모형(模型)(TIFS)을 이용(利用)한 금강하구(錦江河口) 및 연해(沿海)의 조석계산(潮汐計算)
박창언 ( Park Chang Eon ),박승우 ( Park Seung Woo ) 한국농공학회 1986 韓國農工學會誌 : 전원과 자원 Vol.28 No.1
A depth-averaged two dimensional model TIFS was developed from simplified basic flow equations. The model was applied to tidal computations for the Biin Bay area near the Gunsan port. Vertical tides and tidal velocities for the tested was simulated for neap and spring tides. The simulation results were in good agreement with the obserbed data. This paper also attempts to evaluate model sensitivity from different initial conditions, roughness coefficient, time increments, and water depths. Among the selected input parameters, water depth and roughness coefficient were found to significantly affect vertical and horizontal tides.
영산호(榮山湖) 운영(運營)을 위한 홍수예보(洪水豫報)모형(模型)의 개발(開發)(I) -나주지점(羅州地點)의 홍수유출(洪水流出) 추정(推定)-
박창언 ( Park Chang Eon ),박승우 ( Park Seung Woo ) 한국농공학회 1994 韓國農工學會誌 : 전원과 자원 Vol.36 No.4
The series of the papers consist of three parts to describe the development, calibration, and applications of the flood forecasting models for the Youngsan Estuarine Dam located at the mouth of the Youngsan river. And this paper discusses the hydrologic model for inflow simulation at Naju station, which constitutes 64 percent of the drainage basin of 3521.6km<sup>2</sup> in area. A simplified TANK model was formulated to simulate hourly runoff from rainfall. And the model parameters were optimized using historical storm data, and validated with the records. The results of this paper were summarized as follows. 1. The simplified TANK model was formulated to conceptualize the hourly rainfall-run-off relationships at a watershed with four tanks in series having five runoff outlets. The runoff from each outlet was assumed to be proportional to the storage exceeding a threshold value. And each tank was linked with a drainage hole from the upper one. 2. Fifteen storm events from four year records from 1984 to 1987 were selected for this study. They varied from 81 to 289rnm. The watershed averaged, hourly rainfall data were determined from those at fifteen raingaging stations using a Thiessen method. Some missing and unrealistic records at a few stations were estimated or replaced with the values determined using a reciprocal distance square method from abjacent ones. 3. An univariate scheme was adopted to calibrate the model parameters using historical records. Some of the calibrated parameters were statistically related to antecedent precipitation. And the model simulated the streamflow close to the observed, with the mean coefficient of determination of 0.94 for all storm events. 4. The simulated streamflow were in good agreement with the historical records for ungaged condition simulation runs. The mean coefficient of determination for the runs was 0.93, nearly the same as calibration runs. This may indicates that the model performs very well in flood forecasting situations for the watershed.
영산호(榮山湖) 운영(運營)을 위한 홍수예보모형(洪水預報模型)의 개발(開發)(III) -배수갑문(排水閘門) 조절(調節)에 의한 홍수파(洪水波)의 전달(傳達)-
박창언 ( Park Chang Eon ),박승우 ( Park Seung Woo ) 한국농공학회 1995 韓國農工學會誌 : 전원과 자원 Vol.37 No.2
An water balance model was formulated to simulate the change in water levels at the estuary reservoir from sluice gate releases and the inflow hydrographs, and an one-di-mensional reservoir from sluice gate releases and the inflow hydrographs, and an one-di-mensional flood routing model was formulated to simulate temporal and spatial varia-tions of flood hydrographs along the estuarine river. Flow rates through sluice gates were calibrated with data from the estuary dam, and the results were used for a water balance model, which did a good job in predicting the water level fluctuations. The flood routing model which used the results from two hydrologic models and the water balance model simulated hydrographs that were in close agreement with the observed data. The flood forecasting model was found to be applicable to real-time forecasting of water level fluc-tuations with reasonable accuracies.
영산호(榮山湖) 운영(運營)을 위한 홍수예보모형(洪水豫報模型)의 개발(開發)(II) -나주하류유역(羅州下流流域)에서의 홍수유출(洪水流出) 추정(推定)-
박창언 ( Park Chang Eon ),박승우 ( Park Seung Woo ) 한국농공학회 1995 韓國農工學會誌 : 전원과 자원 Vol.37 No.1
This paper describes the applications of the SCS TR-20 hydrologic model for simula-tion of hourly inflow rates from sixty-six ungaged tributaries and subareas between the Naju station and the estuarin dam at the Yongsan River Basin. The model was tested for the ungaged conditions with fifteen storm events at Naju station. Hourly simulated run- off data were compared with the observed, and the results showed less correlationships between the two data than those from TANK model. The coefficients of correlation ranged from 0.74 to 0.87. The curve numbers and time of concentration were defined from topographic dta for each of sixty-six tributaries for the estuarine dam and used for TR-20 applications. The results were within an acceptable range of errors in simulating the inflow fluctuations for the flood forecasting at the estuarine dam.