• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 추계학술대회 초록집
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• pp.203-203
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• 2010

Small hydropower is one of the many types of new and renewable energy, which South Korea is planning to develop, as the country is abundant in endowed resources. In order to fully utilize small hydropower resources, there is a need for greater precision in quantifying small hydropower resources and establish an environment in which energy sources can be discovered using the small hydropower geographic information system. This study has given greater precision to calculating annual electricity generation and installed capacity of small hydropower plants of 117 medium basins by inquiring into average annual rainfall, basin area and runoff coefficient, which is anticipated to promote small hydropower resources utilization. Small hydropower geographic information system was also established by additionally providing base information on quantified small hydropower resources and analysis function and small hydropower generator status, rivers, basin, rainfall gauging station, water level gauging station etc.. Established system of GIS small hydropower energy can be used gather basic information for positive applications of small hydropower energy nationwide.

• 한국농공학회지
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• 제30권2호
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• pp.95-104
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• 1988

This study refers to the development of a hydrologic model simulating daily inflow and release rates for inigation reservoirs. A daily - based model is needed for adequate operation of an irrigation reservoir sufficing the water demand for paddy fields which is closely related to meteorological conditions. And the objective of this study is to develop a reservoir release rate model and then to calibrata the parameters. The release rates model considers daily water demands , water supply for transplanting, minmum release for maintaining canal flow, and maxirnun and regular flooding depth for determining effective rainfall on paddy fields. Each of the factors in the model was regarded as a lumped pararuter representing the average condition of a whole irrigated area. The water demand was estimated form the potential evapotranspiration by Penman method, the effective rainfall, and the infiltration on paddy fields. The release model was found to be capable of adequately simulating daily reservoir releases based on meteorological data.

• 한국수자원학회논문집
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• 제53권7호
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• pp.493-505
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• 2020

현재 유역단위 수문해석을 목적으로 장기간 자료 확보가 용이하고 신뢰도가 확보된 지상관측소 강수량 자료를 강우-유출 모형을 활용하여 유출량을 평가하고 있다. 지상관측소 강수량 자료를 이용하여 면적평균 강수량을 산정하는데 있어 일반적으로 지상관측소의 위치 정보를 바탕으로 Thiessen 다각형법을 널리 이용하고 있으나 지상관측소의 공간적 편중으로 인해 면적평균 강수량 산정과정에서 제약이 있다. 본 연구에서는 시공간적으로 연속적인 강수량 관측이 가능한 기상레이더 자료를 이용하여 유역단위 면적평균 강수량을 산정하고 이를 PRMS 모형의 입력 자료로 활용하여 유출량을 평가하였다. 세부적으로 레이더 강수량의 편의 오차를 해결하기 위하여 G/R Ratio 기법을 적용하여 유역별로 레이더 강수량을 보정하였다. 레이더 강수량을 이용한 유출특성은 Thiessen 면적강수량을 이용한 유출의 통계적 특성을 현실적으로 재현하였다. 지상 관측소에 의존하여 생산하는 Thiessen 면적강수량에 비하여 레이더 강수량을 활용하는 것이 유역에 발생하는 강수의 공간적 특성을 효과적으로 반영하는 것으로 사료되며 향후 수문해석에서 정확도를 확보한 유출량을 제시할 것으로 판단된다.

• 한국환경복원기술학회지
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• 제11권6호
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• pp.26-37
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• 2008

The purpose of the study was to evaluate the effect of pervious pavements on reducing the surface runoff caused by rainfall. The surface runoff from twelve steel experimental beds with different pavement had been recorded every minute from May to September 2008, by the measuring system of tipping buckets(0.1mm/count) and data aquisition systems(National Instrument's Labview and DAQ boards & Autonics PR12-4). The dimension of the experimental bed was $1.5m(W){\times}2.0m(L){\times}0.6m(D)$ and eleven different kinds of vegetational(grass, grass+cubic stone, grass+hole brick), modular(brick, cubic stone, small cubic stone, wood block, interlocking block, clay brick, granular clay brick) and granular(naked soil, gravel) paving materials and concrete were applied for the comparison. Six rain events with depth over 30mm were selected and compared. The maximum depth of the rainfall selected was 137.5mm for 28 hours, and the minimum 30mm for 5 hours. The maximum rainfall per hour was 23mm/hr and the minimum 11.4mm/hr. The major findings were as follows; 1. All pervious pavement applied reduced over 75% of the surface runoff compared with concrete pavement. The grassy and porous pavements were relatively efficient in reducing surface runoff. 2. The grass was the more efficient as intercepting average 69.5mm of initial surface runoff, and maximum 77.8mm at the condition of 13.5mm/hr rainfall. The next was gravel intercepting maximum 65.5mm at the condition of 13.5mm/hr and the 40.9mm at 19.1mm/hr, average 55.7mm. 3. The modular pavements common in urban area were not good in intercepting the runoff except the 'clay granular brick' compared with others. The 'clay granular brick' showed relatively efficient intercepting average 14.1mm, which was the bigger amount than the 'grass+hole brick'. 4. The 'naked soil' were more effective than the 'concrete', 'brick', and 'interlocking block' in reducing the surface runoff, but less efficient than other materials. The capacity of the 'naked soil' to intercept the initial rainfall was similar to the 'brick'. As summary, the more grassy and porous pavement shows more effective in reducing surface runoffs.

• 상하수도학회지
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• 제19권2호
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• pp.173-180
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• 2005

In this study, quantity and quality of collected rainwater by the ground collection system were investigated and the Rainwater Collection Prediction Model was developed to predict the amount of collected rainwater. The quantity of collected rainwater in the collection system was 9516 L(38.2%) and the quantity of infiltrated rainwater in the collection system was 9946 L(40.2%) through $25m^2$ area for the study period, respectively. Average turbidity of collected rainwater in collection system was 2.2 NTU, and average turbidity of infiltrated rainwater in collection system was 2.3 NTU for study period, respectively. The predicted amount by the model and the actual collected amount were 9842.4 L and 9516 L, which were very close showing that prediction was excellent. The optimal rainwater storage tank volume was simulated with a certain consumption condition for various cities with different rainfall patterns.

• 한국방사선학회논문지
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• 제7권5호
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• pp.347-352
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• 2013

본 논문은 강릉 지역에서 동일 기간에 기록된 공간 감마선량률과 강수량, 일조시간, 평균풍속 사이의 교차 상관 지수 ${\rho}_{DCCA}$를 DCCA cross-correlation coefficient(DCCA ${\rho}$)방법으로 구하여 교차 상관성을 분석하였다. 우리는 이 연구를 통해 다음의 사실을 알았다. 첫 번째, 공간 감마선량률과 강수량 사이 ${\rho}_{DCCA}$는 일(4~7일), 달(30일), 계절(90일), 년(360일)에서 0.57~0.48, 0.39, 0.34, 0.26, 공간 감마선량률과 일조시간 사이 ${\rho}_{DCCA}$는 일, 달, 계절, 년에서 -0.20~-0.23, -0.22, -0.17, -0.13, 공간 감마선량률과 평균풍속 사이의 ${\rho}_{DCCA}$는 일, 달, 계절, 년에서 -0.10~-0.12, -0.11, -0.05, -0.05이다. 두 번째, ${\rho}_{DCCA}$를 통하여 공간 감마선량률과 강수량은 교차 상관성이 있으며 공간 감마선량률과 일조시간, 평균풍속 사이에는 교차 상관성이 없다는 것을 확인하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.1209-1212
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• 2007

Urban flooding with surcharges in sewer system was investigated because of unexpected torrential storm events these days, causing significant amounts of human and economic damages. Although there are limitations in forecasting and preventing natural disasters, integrated urban flooding management system using the SWMM(Storm Water Management Model) engine and Web technology will be an effective tool in securing safety in operating rubber-tired transportation system. In this study, the study area, located in Chuncheon, Kangwon province, was selected to evaluate the applicability of the SWMM model in forecasting urban flooding due to surcharges in sewer system The catchment are 21.10 ha in size and the average slope is 2% in lower flat areas. Information of subcatchment, conjunctions, and conduits was used as the SWMM interface to model surface runoff generation, water distribution through the sewer system and amount of water overflow. Through this study, the applicability of the SWMM for urban flooding forecasting was investigated and probability distribution of storm events module was developed to facilitate urban flooding prediction with forecasted rainfall amounts. In addition, this result can be used to the establishment of disaster management system for rainfall safety of rubber-tired tram in the future.

• 토지주택연구
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• 제2권2호
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• pp.157-162
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• 2011

본 논문은 강원도 횡성지역에서 집중호우와 태풍 에위니아, 빌리스의 선행강우에 의해 2006년 7월 16일에 발생한 산사태 피해 발생 원인과 특성에 대하여 분석한 결과이다. 산사태 발생의 직접적인 원인은 7월 12일~13일의 선행강우로 지반의 포화도가 증가된 상태에서 7월 15일~16일의 집중호우로 인해 피해가 발생한 것으로 확인되었다. 자연 사면의 산사태 유형은 얕은 심도의 풍화잔류토층과 기반암의 경계면에서 활동이 진행되는 전이형 사면활동으로 확인되었다. 횡성지역에서 발생한 100개소에 대한 자료의 종합적인 분석 결과, 산사태 발생의 사면길이는 100m이하(87%), 사면 폭은 30m이하(74%), 평균사면경사는 $24^{\circ}$로 나타났다.

• 한국수자원학회논문집
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• 제32권6호
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• pp.627-636
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• 1999

지구온난화의 영향으로 배증 CO2 상태가 되는 약 60년 후의 한반도 평균강수량은 약 5-10%정도의 증가로 예측되고 있다. 그러나 수자원분야에서 평균강수량의 증가보다 더 중요한 것은 홍수 또는 가뭄과 같은 극치기상의 빈도 변화이다. 현재 국제적으로 이러한 극치기상의 빈번한 발생이 지구온난화의 한 증거로 받아들여지고 있기는 하나 그 양상이 어떻게 되리라고는 예측되고 있지 않다. 따라서 본 연구에서는 그러한 변화 양상을 예측해 보기 위한 방법론을 제시해 보는 것을 목적으로 한다. 본 연구에서 사용한 방법은 Todorovic과 Woolhiser(1975), katz(1977) 등의 일강수분포 관련 연구를 토대로 하여 월/연강수량의 변화에 다른 일강수의 특성을 매개변수의 변화로 고려하고 이를 통해 일강수의 분포변화를 예측하는 것이다. 본 연구에서는 두 일강수량(10mm,50mm)을 임계치로 하여 월/연강수량의 변화에 따른 10mm이하 및 50mm이상의 발생확률을 조사하였다. 이러한 발생확률의 변화가 바로 가뭄과 홍수의 변화로 직결되지는 않으나 그 양상을 짐작하게 하는 좋은 지표가 될 수 있으리라 판단된다. 아울러 연강수량의 변화에 따른 일강수의 분포변화는 월강수의 변화를 고려하는 경우보다 그 정도가 작았으며, 특히 월강수량의 변화를 고려하는 경우 우기인 여름철에 그 발생빈도의 변화가 아주 큰 것으로 나타났다.

• 한국환경과학회지
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• 제22권5호
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• pp.555-562
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• 2013

Jeju Island, the heaviest raining area in Korea, is a volcanic Island located at the southernmost of Korea, but most streams are of the dry due to its hydrological/geological characteristics different from those of inland areas. Therefore, there are limitations in applying the results from the mainland to the studies on stream run-off characteristics analysis and water resource analysis of Jeju Island. In this study, the SWAT(soil & water assessment tool) model is used for the Hwabuk stream watershed located east of the downtown to calculate the long-term stream run-off rate, and WMS(watershed modeling system) and HEC-HMS(hydrologic modeling system) models are used to figure out the stream run-off characteristics due to short-term heavy rainfall. As the result of SWAT modelling for the long-term rainfall-runoff model for Hwabuk stream watershed in 2008, 5.66% of the average precipitation of the entire basin was run off, with 3.47% in 2009, 8.12% in 2010, and root mean square error(RMSE) and determination coefficient($R^2$) was 496.9 and 0.87, respectively, with model efficient(ME) of 0.72. From the results of WMS and HEC-HMS models which are short-term rainfall-runoff models, unless there was a preceding rainfall, the runoff occurred only for rainfall of 40mm or greater, and the run-off duration averaged 10~14 hours.