• Title/Summary/Keyword: BASIN MANAGEMENT

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토양 및 지형학적 특성에 따른 영산강유역의 소유역 분류 (Morphological Classification of Unit Basin based on Soil & Geo-morphological Characteristics in the yeongsangang Basin)

  • 손연규;현병근;정석재;허승오;정강호;서명철;하상건
    • 한국토양비료학회지
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    • 제40권4호
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    • pp.262-268
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    • 2007
  • 농업 비점오염원으로부터의 수질 보전이나 수자원 관리는 농업적 관리뿐만 아니라 수질관리 및 수자원 관리를 위해서도 유역단위 특히, 소유역의 토양특성을 포괄하는 단위로 체계적으로 분류할 필요성이 있다. 우리나라의 남서쪽에 위치한 영산강유역의 50개 소유역을 대상으로 토양도, 지형도, 하천도 및 유역도를 이용하여 만곡도, 산림의 비율, 평탄지의 비율, 다른 소유역으로부터의 유입 여부 등 토양학적으로 중요한 4개의 특성을 이용하여 군집분석을 수행하였다. 그 결과 5개의 군으로 구분할 수 있었으며, 이 구분의 적합도를 검정하기 위하여 Mantel test를 한 결과 r = 0.83으로 나타나 적합하다는 결론을 얻었다. 이와 같이 토양과 지형특성을 포괄하는 소유역의 분류 및 유사성에 따른 그룹화는 농업에서의 최적영농관리나 오염물질에 따른 수질관리, 수문모형의 적용성 확대 및 수자원 관리에 합리적 유용성을 제공할 것이며 체계적 관리의 밑바탕이 될 것이다.

토지자원관리를 위한 낙동강 유역의 잠재적 토양유실량 산정 (Potential Soil Loss Prediction for Land Resource Management in the Nakdong River Basin)

  • 오정학;정성관
    • 농촌계획
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    • 제11권2호
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    • pp.9-19
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    • 2005
  • The purpose of this study is to analyze the potential soil loss and hazard zone by the Revised Universal Soil Loss Equation(RUSLE) for preservation and management of land resources which is the base of ecosystem, and to grasp the relationship between RUSLE factors in the Nakdong River Basin. All thematic maps used in RUSLE are constructed through GIS and spatial analysis method derived from digital topographic maps, detailed soil maps, land-cover maps, and mean annual precipitation of 30 years collected respectively from National Geographic Information Institute, National Institute of Agricultural Science and Technology, and Ministry of Environment. The slope length of LS-factor that takes much times by the study area's wideness was calculated automatically through AML(Arc Macro Language) program developed by Van Remortel et al.(2001, 2003). The results are as follows; First, according to the soil loss estimation by the RUSLE, it shows that approximately 82% of the study area have relatively lower possibility of soil loss which is the 1 ton/ha in annual soil loss. While, 9.4% ($2,228km^2$) needed intensive and continuous management for soil loss. Because the amount of their annual soil loss was greater than 10 ton/ha that is optimum level suggested by Morgan(1995). For these areas, the author believe that a new approach which can minimize environmental impacts from soil loss through improvement of cultivation process and buffer forest zone should be applied. Second, according to the relationship between the RUSLE factors, topographical(LS-factor) and cover management(C-factor) conditions have a lot of influence on soil loss in case of the Nakdong River Basin. However, because of RUSLE factor's influence that affect to soil loss might be different based on the variety of spatial hierarchy and extent, it is necessary to analyze and evaluate factor's relationship in terms of spatial hierarchy and extent through field observations and further studies.

화학사고 예방을 위한 사업장 화학안전캠페인 활동 사례 (A Regional Safety Campaign to Prevent Chemical Accidents in the Workplace)

  • 박지훈;박선오;박효진;권혜옥
    • 한국환경보건학회지
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    • 제49권5호
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    • pp.247-250
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    • 2023
  • This case report aims to introduce the safety campaign activities for preventing chemical accidents that were cooperatively conducted by an environmental office and chemical-handling workplaces located in the Ulsan area. A chemical safety campaign was initiated to examine and manage chemical-handling facilities at high risk for chemical accidents, specifically valves, flanges, and switches (VFS) from October 2020 to December 2022. The VFS safety check campaign was conducted to raise workers' safety consciousness based on a campaign of advertisements in the workplace from October 2020 to December 2021. In addition, a VFS plus [+] campaign was initiated to encourage actual management activities for chemical-handling facilities at high risk of chemical accidents in 2022. A total of 49 corporations participated in the VFS plus [+] campaign. In contrast to the VFS safety check campaign, which simply focused on publicity and resulted in changes in worker awareness, practicable safety management activities focusing on the handling facilities were carried out. Although notable short-term impacts have yet to be discerned from the campaigns, it is expected that they will eventually serve as a starting point for developing a proper safety culture and environment.

Assessment of Ecosystem services under changing climate in the Bagmati Basin of Nepal

  • 쉬크샤 바스톨라;성연정;이상협;정영훈
    • 한국수자원학회:학술대회논문집
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    • 한국수자원학회 2019년도 학술발표회
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    • pp.148-148
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    • 2019
  • The 2006 Millennium Ecosystem Assessment (MA) defines ecosystem services (ES) as "the benefits people obtain from ecosystems". Identifying where ES originates, whom it benefits and how it is changing over a period of time is critical in rapidly developing country like Nepal, where the risk of ES loss is high. In the context of various ecosystem services provided by watershed, this study, particularly deals with water yield, Soil loss and Carbon sequestration computation and evaluation in Bagmati Basin of Nepal. As Bagmati Basin incorporates capital city Kathmandu of nepal, land use change is significant over decades and mapping of ES is crucial for sustainable development of Basin in future. In this regard, the objectives of this study are 1) To compute the total and sub-watershed scale water yield of the basin, 2) Computation of soil loss and sediment retention in the basin, and 3) Computation of carbon sequestration in the basin. Integrated Valuation of Environmental Services and Tradeoffs (InVEST), a popular model for ecosystem service assessment based on Budyko hydrological method is used to compute Ecosystem services. The scenario of ES in two periods of time can be referenced for various approaches of prioritization and incorporation of their value into local and regional decision making for management of basin.

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SWMM 모델을 이용한 지속 가능한 도시 소하천 관리를 위한 LID 기법의 적용 방안 연구 (Application of LID Methods for Sustainable Management of Small Urban Stream Using SWMM)

  • 한양희;서동일
    • 대한환경공학회지
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    • 제36권10호
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    • pp.691-697
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    • 2014
  • 도시 하천의 지속가능한 관리를 위해서는 적절한 유역 관리가 필수적이다. 현재 대전 관평천의 상류 유역은 그린벨트지역으로 보호되어 있으나 해당 유역의 농경활동이나 도로공사 등 인위적인 요인으로 인해 관평천은 지속적인 환경문제를 나타내고 있다. 관평천의 적절한 종합 수자원 관리 계획을 수립하기 위해서는 하천의 수질문제 뿐만 아니라 유량 문제도 의미있게 고려되는 것이 바람직하다. 본 연구에서는 관평천 유역에 대해 대표적인 도시형 강우 유출 모형인 storm water management model (SWMM)을 구축하고 실측자료를 활용하여 보정 및 검증을 실시하고 향후 임의의 강우 조건에 대해 하천 주요지점의 유량 및 수질을 예측할 수 있도록 하였다. 유량 보정은 상관계수($R^2$)가 0.9 이상의 양호한 수준으로 수행되었으나 수질 보정은 상대적으로 오차가 큰($0.67{\leq}R^2{\leq}0.87$) 것으로 나타났다. SWMM 모델을 이용하여 상류 유역이 개발되었을 경우 환경에 영향을 적게 미치는 LID (low impact development) 기법을 적용하는 가상의 시나리오를 구성하여 비교할 수 있는 방법을 구축하였다. 본 연구결과는 향후 관평천 상류지역을 개발하거나 환경관련 관리 계획을 수립할 경우, LID기법을 포함한 합리적인 수자원 기법 선택에 많은 도움을 제공할 수 있을 것으로 기대된다.

금호강 유역의 오염총량 관리 대책 수립 (The Management Planning of Pollutant Loading Allocation in the Kumho River Basin)

  • 황병기;정효준
    • 한국환경과학회지
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    • 제11권10호
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    • pp.1125-1131
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    • 2002
  • This study was performed to plan pollutant loading allocation by sub-watershed at Kumho river basin located in the north Kyeongsang province. HEC-geoHMS which is extension program of ArcView was used to extract sub-watershed. To simulate water quality, Qua12eu model was calibrated and validated. BOD was simulated under several scenarios to evaluate reduction effects of pollutant loading. Uniform treatment and transfer matrix method was considered. Effects of headwater flow rate and efficiency waste water treatment plant were also considered.

실시간 물 관리 운영을 위한 유역 유출 모의 모형 개발 (Development of Basin-wide runoff Analysis Model for Integrated Real-time Water Management)

  • 황만하;맹승진;고익환;박정인;류소라
    • 한국농공학회:학술대회논문집
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    • 한국농공학회 2003년도 학술발표논문집
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    • pp.507-510
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    • 2003
  • The development of a basin-wide runoff analysis model is to analysis monthly and daily hydrologic runoff components including surface runoff, subsurface runoff, return flow, etc. at key operation station in the targeted basin. A short-term water demand forecasting technology will be developed taking into account the patterns of municipal, industrial and agricultural water uses. For the development and utilization of runoff analysis model, relevant basin information including historical precipitation and river water stage data, geophysical basin characteristics, and water intake and consumptions needs to be collected and stored into the hydrologic database of Integrated Real-time Water Information System. The well-known SSARR model was selected for the basis of continuous daily runoff model for forecasting short and long-term natural flows.

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RUSLE 모델을 이용한 금강 유역의 토지 이용별 토사유출량 추정 (Estimation of Soil Loss by Land Use in the Geum River Basin using RUSLE Model)

  • 박지상;김건하
    • 한국물환경학회지
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    • 제22권4호
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    • pp.619-625
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    • 2006
  • Amount of soil loss is important information for the proper water quality management, In this research, annual average soil loss of the Geum River basin was estimated using RUSLE (Revised Universal Soil Loss Equation) and GIS (Geographic Information System). Input data were manipulated using ArcGIS ver. 8.3. From crop field which constitute 8.2% of the Geum River Basin, annual average soil loss was estimated as 53.6 ton/ha/year. From the rice paddy field which constitutes 20% of the Geum River Basin, soil loss was estimated as 33.5 ton/ha/year, In comparison, forestry area which constitutes 61.8% of the basin discharged 2.8 ton/ha/year, It could be known from this research that appropriate measures should be implemented to prevent excessive soil loss from the agricultural areas.

Balancing Multiple Needs in Conflicts for an Urbanized River Basin

  • Yoshitani, Junichi
    • 한국수자원학회:학술대회논문집
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    • 한국수자원학회 2007년도 학술발표회 논문집
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    • pp.53-57
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    • 2007
  • Tsurumi River Basin successfully started to prepare a Water Master Plan though a series of discussions by gathering all stakeholders in a hall. It began with setting five management targets namely, flood, low flow, natural environment, emergency use, and recreational use, followed by setting management goals by target as well as a one-sentence catchphrase for the Water Master Plan using a bottom-up approach. The author reviews this process and discusses the background of the success.

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Application of Convolutional Neural Networks (CNN) for Bias Correction of Satellite Precipitation Products (SPPs) in the Amazon River Basin

  • Alena Gonzalez Bevacqua;Xuan-Hien Le;Giha Lee
    • 한국수자원학회:학술대회논문집
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    • 한국수자원학회 2023년도 학술발표회
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    • pp.159-159
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    • 2023
  • The Amazon River basin is one of the largest basins in the world, and its ecosystem is vital for biodiversity, hydrology, and climate regulation. Thus, understanding the hydrometeorological process is essential to the maintenance of the Amazon River basin. However, it is still tricky to monitor the Amazon River basin because of its size and the low density of the monitoring gauge network. To solve those issues, remote sensing products have been largely used. Yet, those products have some limitations. Therefore, this study aims to do bias corrections to improve the accuracy of Satellite Precipitation Products (SPPs) in the Amazon River basin. We use 331 rainfall stations for the observed data and two daily satellite precipitation gridded datasets (CHIRPS, TRMM). Due to the limitation of the observed data, the period of analysis was set from 1st January 1990 to 31st December 2010. The observed data were interpolated to have the same resolution as the SPPs data using the IDW method. For bias correction, we use convolution neural networks (CNN) combined with an autoencoder architecture (ConvAE). To evaluate the bias correction performance, we used some statistical indicators such as NSE, RMSE, and MAD. Hence, those results can increase the quality of precipitation data in the Amazon River basin, improving its monitoring and management.

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