• 제목/요약/키워드: Peak runoff volume

검색결과 103건 처리시간 0.025초

신도시 개발에 따른 첨두유출량과 토양유실량 변화에 관한 연구 -목포시 남악 신도시 개발지를 대상으로- (A Study on the Peak Discharge and Soil Loss Variation due to the New Town Development - In the Case of Namak New Town Development Area -)

  • 우창호;조남열
    • 환경영향평가
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    • 제11권4호
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    • pp.271-280
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    • 2002
  • The purpose of this study is to explore the hydrological impacts and soil loss variation due to the land use change of Namak New Town development area. The analysis of hydrological effects and soil loss variation has been carried out using GIS in this study. In order to estimate the peak runoff volume, the Rational Method which is the most popular technique to predict runoff amounts is used. To estimate the soil loss in the study area, Universal Soil Loss Equation(USLE), which is one of the most comprehensive and useful technique to predict soil erosion is adopted. The result of this study has shown that the peak runoff volume and the total soil loss increase according to the land use change. The peak runoff volume and the total soil loss have been increased about 2 times and about 48 times more than that of pre development. The increasing of the peak runoff volume can be effective erosion, flooding and so on. A careful city planning is the first essential step to minimize the environmental impacts and to construct the ecological city.

LID 개념 적용으로 인한 유출 감소 특성 가능성 분석 및 바이모달 트램 전용노선에서의 적용성 검토 (Analysis of Runoff Reduction Characteristics with LID Adaptation and LID Applicability at Bimodal Tram Route)

  • 박준호;박영곤;윤희택;유용구;김종건;박윤식;임경재
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2008년도 춘계학술대회 논문집
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    • pp.147-150
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    • 2008
  • Changes in land uses at urbanizing areas are causing flooding, increase in NPS pollutants. Thus, Low Impact Development (LID) concept is now being employed in urban planning for sustainable development. Compared with the conventional BMPs, the LID is a new concept in urban planning to minimize the impacts of urbanization for site-specific LID IMPs. The objective of this study is to analyze the efficiency of LID adoption in study watershed in peak rate runoff and runoff volume reduction perspectives. The analysis revealed that the peak rate runoff and runoff volume decreased significantly with the LID adoption. This indicates that the Bimodal tram route with grass installed at the center of the road will contribute reduction in surface runoff and peak rate runoff, and also in NPS pollutant generation from the Bimodal tram route.

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소유역 오염예측모형 AGNPS 의 특성과 실험적 적용 (The Characteristics and Experimental Application of AGNPS Model for Pollution Predicting in Small Watershed)

  • 최진규;이명우;손재권
    • 환경영향평가
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    • 제3권2호
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    • pp.47-56
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    • 1994
  • AGNPS model is an event-based model to analyze nonpoint-source and to examine potential water quality problems from agricultural watershed. This model uses a square grid-cell system to represent the spatial variability of watershed conditions, and simulates runoff, sediment, and nutrient transport for each cell. AGNPS model was applied on Yeonwha watershed, and the test results were compared with the measured data for runoff volume, peak runoff rate, suspended solids, and phosphorus concentration. The watershed of 278.8 ha was divided into 278 cells, each of which was 1 ha in size. The coefficients of determination for runoff volume and peak flow were (0.893 and 0.801 respectively from regression of the estimated values on the measured values. The concentration of suspendid solid was increased but decreased that of phosphate with runoff volume.

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우수저류시설의 배치방법에 따른 유출 및 침수피해 저감효과 분석 (Analyzing the Reduction of Runoff and Flood by Arrangements of Stormwater Storage Facilities)

  • 박창열;신상영;손은정
    • 한국물환경학회지
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    • 제29권1호
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    • pp.45-54
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    • 2013
  • This study analyzes the reduction effects of runoff and flood damage through different arrangements of stormwater storage facilities. Three scenarios based on the spatial allocation of storage capacity are used: concentrated, decentralized and combinative. The characteristics of runoff and flood damage by scenario are compared. The XP-SWMM model is used for runoff simulation by the probable rainfall of return period. The result shows that the concentrated arrangement of storage facilities is most effective to reduce the amount of peak flow and to delay the time of peak flow. Yet, while the concentrated arrangement is most effective to reduce the inundation damage, it is not effective to reduce runoff volume. The decentralized arrangement is most effective to reduce runoff volume. The combinative arrangement is effective not only the runoff reduction but also the reduction of flood damage. The result indicates that the flood mitigation strategies against heavy rainfall need to consider decentralized on-site arrangement for the reduction of runoff volume along with concentrated off-site arrangement of storage facilities.

관개논과 산림유역의 홍수유출 특성 비교 (A Comparative Study of Storm Runoff Characteristics far Irrigated Paddy Fields and forest Watershed)

  • 임상준;박승우;강문성
    • 한국농공학회지
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    • 제44권3호
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    • pp.65-72
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    • 2002
  • Rainfall and runoff data from a forested watershed and irrigated rice paddies at the Bal-an experimental watershed were monitored and analyzed to investigate the variations of runoff characteristics with different land use. The comparisons were conducted fourteen storm events ranging 21.8∼190.2 mm of rainfall. Field data showed that direct runoff from paddies and forested watershed are not significantly different in volume. The peak discharge from forest watershed was less than that from paddies far lighter storms, but became greater fur heavier storms. The peak runoff from the forest watershed was 39 percent greater than from the paddies. The results demonstrate that paddies play an important role to reduce peak discharge from heavy storms as compared to forest.

도시 소유역의 유출변화 분석 (Runoff Analysis of Urban Small Watershed)

  • 이기춘;박승우;최진규
    • 한국농공학회지
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    • 제31권1호
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    • pp.45-57
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    • 1989
  • The hydrologic model FESHM was introduced and its applicability was investigated in an attempt to analyze the rainfall-runoff relationships of urban small watersheds and to hereafter predict the envi-ronmental changes. Basic data on rainfall, water level, geomorphological characterisitics and land use were obtained from Yeonwha stream watershed located in Chonju-si Dukjin-dong. WL-5 for simulation o subshed WS# 1(136.7 ha) with urban district and WL-1 for total watershed WS#5 (278.78 ha) we'e selected as gaging points. The main results gained through applications were summarized as follows. 1. Direct runoff ratio caalculated from a simple separation method for WS#5 WS# 1 was 2O~39%, 38~62%, respectively. 2. Simulations for the runoff estimation were carried out for each watershed using 5 rainfall events, the simulation errors had the range of 2~ 30%, O~ 63% and O 120 minutes for the runoff volume, peak flow and peak time, respectively. 3. The effect of landuse change by urbanization was tested to WS# 1, runoff volume before development was estimated as from tenth to twentieth against after development.

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유출저감을 위한 유역내 침투시설의 적용 (An Application of Infiltration Facilities for Reducing the Runoff in the Basin)

  • 이재준;설지수
    • 한국방재학회 논문집
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    • 제11권3호
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    • pp.133-141
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    • 2011
  • 유역의 도시화는 유출총량과 첨두유량의 증가와 도달시간이 감소시키며, 홍수피해의 위험성을 더욱 크게 만든다. 침투시설은 도시유역의 유출총량과 첨두유량을 감소시킬 수 있고, 그 종류에는 침투트렌치와 투수성 포장재 등이 있다. 본 연구에서는 침투시설 설치에 따른 우수유출저감효과를 알아보기 위하여 경북 구미시 옥계동의 $0.18km^2$와 공단동의 $0.67km^2$의 면적을 가진 도시유역을 대상으로 하여 각각의 유역특성을 분석하고, 유출총량 및 첨두유량의 저감량을 WinSLAMM 모형을 이용하여 분석하였다. 또한, 침투시설 설치에 따른 첨두유량저감효과를 분석하였고, 침투시설 면적비와 유출저감률과의 관계식을 도출하였다.

토지이용에 따른 강우-유출 특성 변화(농지조성 및 농어촌정비) (Variations of Rainfall-Runoff Characteristics with Landuse)

  • 임상준;서춘석;박승우
    • 한국농공학회:학술대회논문집
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    • 한국농공학회 2000년도 학술발표회 발표논문집
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    • pp.72-77
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    • 2000
  • The purpose of this study were to monitor rainfall and runoff data from paddy blocks and forest areas at the Balan Experimental Watershed, and to investigate the variations of runoff characteristics with different land use. Field data showed that the total runoff from paddies and forest areas are not significantly different in volume. The peak discharge from forest areas was less than that from paddies for lighter storms, but became greater for heavier storms. The results demonstrate that paddies play an important role to reduce peak discharge from heavy storms as compared to forest.

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우수 침투 시설을 활용한 친환경 도시 개발지구에서의 유출량 및 비점오염 저감 효과 분석 (Analysis of Effect on Runoff and Water Quality of LID using Infiltration Facilities)

  • 황진용;연규석;김익재;김기성;최중대;전지홍;임경재
    • 한국농공학회논문집
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    • 제51권6호
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    • pp.105-114
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    • 2009
  • With urbanization in many countries, many pervious areas are being converted into impervious areas. These land use changes cause many negative impacts on runoff and water quality in the areas. Especially runoff volume and peak runoff are increasing with urbanization. In addition to the increased runoff, more pollutant transports to the downstream areas. For these reasons, Low Impact Development (LID) are nowadays being introduced in urban planning. For environment-friendly and economical urban development, the LID Integrated Management Practices (IMPs) are applied in various urban development. However, exact effects on runoff and water quality of various LID IMPs are not assessed with proper LID evaluation technique. Thus, the SWMM (Storm Water Management Model) 5.0 model was slightly modified to simulate the effect of infiltration manhole on runoff and water quality. For comparison of runoff and TSS (Total Suspended Solids) from the study area (26.5 ha), three scenarios were made in this study. It was found that runoff volume, peak runoff, and TSS could be reduced with infiltration manholes and pervious pavements to some degree. Although, there are many limitations in the analysis of LID effects on runoff and TSS, similar trends shown in this study would be expected with site-specific LID IMPs. Thus, it is strongly recommended that various site-specific LID IMPs, such as infiltration facilities, should be applied as much as possible for environment-friendly urban planning.

분포형 강우-유출모형의 하도자료 구축을 위한 하폭 및 하상경사 산정공식 개발 (Development of Stream Width and Bed-slope Estimation Equations for Preparing Data for Distributed Storm Runoff Model)

  • 정인균;박종윤;조형경;이지완;김성준
    • 한국농공학회논문집
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    • 제52권4호
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    • pp.1-10
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    • 2010
  • In this study, two estimation equations for preparing stream data for distributed storm runoff model were developed by analyzing the nonlinear relation between upstream flow-length and stream width, and between upstream flow-length and stream bed-slope. The equations for stream cell were tested in Chungjudam watershed (6,661 $km^2$) using KIMSTORM. Six storm events occurring between 2003 and 2008 were selected for the model calibration and verification before the test of equations. The average values of the Nash-Sutcliffe model efficiency (ME), the volume conservation index (VCI), the relative error of peak runoff rate (EQp), and the difference of time to peak runoff (DTp) were 0.929, 1.035, 0.037, and -0.406 hr for the calibrated four storm events and 0.956, 0.939, 0.055, and 0.729 hr for the two verified storm events respectively. The estimation equations were tested to the storm events, and compared the flood hydrograph. The test result showed that the estimation equation of stream width reduced the peak runoff and delaying the time to peak runoff, and the estimation equation of stream bed-slope showed the opposite results.