• 제목/요약/키워드: river basin

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Climate changes impact on water resourcesinYellowRiverBasin,China

  • Zhu, Yongnan;Lin, Zhaohui;Wang, Jianhua;Zhao, Yong
    • 한국수자원학회:학술대회논문집
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    • 한국수자원학회 2016년도 학술발표회
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    • pp.203-203
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    • 2016
  • The linkage between climate change and water security, i.e., the response of water resource to the future climate change, have been of great concern to both scientific community and policy makers. In this study, the impact of future climate on water resources in Yellow River Basin in North of China has been investigated using the Coupled Land surface and Hydrology Model System (CLHMS) and IPCC AR5 projected future climate change in the basin. Firstly, the performances of 14 IPCC AR5 models in reproducing the observed precipitation and temperature in China, especially in North of China, have been evaluated, and it's suggested most climate models do show systematic bias compared with the observation, however, CNRM-CM5、HadCM5 and IPSL-CM5 model are generally the best models among those 14 models. Taking the daily projection results from the CNRM-CM5, along with the bias-correction technique, the response of water resources in Yellow river basin to the future climate change in different emission scenarios have been investigated. All the simulation results indicate a reduction in water resources. The current situation of water shortage since 1980s will keep continue, the water resources reduction varies between 28 and 23% for RCP 2.6 and 4.5 scenarios. RCP 8.5 scenario simulation shows a decrease of water resources in the early and mid 21th century, but after 2080, with the increase of rainfall, the extreme flood events tends to increase.

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Fractal 나무의 개념을 기반으로 한 설마천 시험유역의 Fractal 차원 추정 (Estimation of fractal dimension for Seolma creek experimental basin on the basis of fractal tree concept)

  • 김주철;정관수
    • 한국수자원학회논문집
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    • 제54권1호
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    • pp.49-60
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    • 2021
  • 본 연구에서는 Fractal 나무의 개념을 이용하여 자연유역의 두 가지 개별적 Fractal 차원을 추정하는 방법을 제시하고자 한다. 이를 위하여 Fractal 나무의 성장 과정을 기반으로 유역 내부에서 발생 가능한 모든 배수 경로를 추출하여 완전한 배수망을 구성하고 이에 해당하는 Fractal 특성을 분석해 보고자 한다. 유역 내부에서 Fractal 나무의 성장 과정은 하천 유동의 특성을 가지는 배수 경로에서만 제한적으로 나타날 수 있다. 소규모 유역의 경우 Fractal 나무의 성장 단계에 따라 망상 구조의 분기 특성이 단일 하천 구간의 사행 특성에 비하여 민감하게 변화하여 단일한 망상 구조 속에서도 다양한 분기 구조가 생성될 수 있다. 따라서 소규모 유역을 대상으로 한 망상 구조에 대한 Fractal 차원은 단일한 수치의 고정된 형태보다는 범위의 형태로 취급되어야 하는 것이 타당한 것으로 판단된다. 또한, 소규모 유역의 배수 구조에 대한 분석에는 지형도나 수치지도로부터 추출한 하천망보다 본 연구에서 제시한 Fractal 나무의 성장에 따른 망상 구조와 같은 정보가 더 유용할 수 있을 것으로 판단된다.

漢江 水質保全 行政에 관한 硏究 (A Study on the Administration for the Han River Water Quality Control)

  • Kim, Kwang Hyop
    • 한국환경보건학회지
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    • 제10권2호
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    • pp.9-40
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    • 1984
  • This thesis purports to overview the diverse administrative and organizational factors and plannings developed by the government organizations, municipal or otherwise, to tackle the Han River water pollution issues in the past years. This thesis also looks into the ever-worsening Han River water pollution problems, in particular, in terms of the various government plans ostensibly designed to reduce the pollution level but with little success. Also dealt with are the efficiencies with which the laws and decrees on water pollution the administrative organizations put to use in the prosecution of the diverse antiwater pollution projects involving the Han River basin. From the early 1960's up to the 1970's the government had concentrated on the growth-oriented economic policy with the result that little attention had been paid to the water pollution and other environmental issues that are bound to arise from the massive economic growth. Belatedly, the five-year Hah River Development Project was initiated in 1982 with emphasis on reducing the water pollution level at Hah River to the minimum. The following are the gists of the thesis and recommendations for the future antiwater pollution plans by the administrative organizations: 1. Documents to date indicate that the irrigation projects along the Han River area had been the main focus of attention during the Yi Dynasty and under the Japanese rule of the country. 2. Despite that the water pollution issue became the subject of many debates among the academic and research institutions in the 1960's and in the 1970's, the administrative organizations in charge of the Han River water quality control failed to come up with a concrete plan for the river's water quality control. 3. Nevertheless, the water pollution of the Han River area in fact began in the 1950's, with the unprecedented concentration into Seoul of population and the industrial facilities on a larger scale, in particular, enforced by the government's strong growthoriented policy in its Economic Development plans in the 1960's. 4. Starting in the 1960's, the Han River water pollution level dramatically increased, but the government was reluctant to promulgate or put into effect strong measures to curb the many factors contributing to the river water pollution, thus worsening the environmental issues along the Han River basin. 5. The environmental protection law and other laws and decrees relating to the antiwater and air pollution issues that were subsequently put into effect underwent so many changes that efficient anti-water pollution policies could not be effected for the Han River basin. The frequent organizational reshuffle within the administrative units concerned with environmental problems has resulted in the undue waste in personnel management and finance. 6. The administration on the environmental protection could not be efficiently carried out due to the organizational overlapping. Under the existing law, frequent organizational frictions and inefficiency are bound to occur among the central government offices themselves, as well as between the central government and the Seoul city administration, and among the city's administrative offices over the conservation of the Han River basin and over the river's anti-water pollution issue. 7. In the planning and prosecution of the Han River project, political influences from the president down to the lower-level politicious appear to have been involved. These political influences in the past had certainly had negative influence on the project, nevertheless, it appears that in the recent years, these political influences are not all that negative in view of the fact that they serve as a positive contributing factor in developing a better water quality control project along the Han River basin. The following are a few recommendations based on the data from the thesis: First, officials in charge of the Han River water quality control should pay attention to a careful screening of the opinions and recommendations from the academic circles and from the public should be made so that the government could better grasp the core issues in the environmental problems that require preventive and other necessary measures. Second, vigorous redistribution policies of population and industrial facilities away from the Seoul area should be pursued. Third, the government should refrain from revising or revamping too frequently the laws and decrees on the anti-water pollution, which is feared to cause undue inconveniences in the environmental administration. Fourth, a large-scale streamlining should be made to the existing administrative organization in an effort to do away with the inter- and intra-organizational friction. It is recommended that a secretariat for the Hah River basis conservation be established. Fifth, High-level administrative officials, with a thorough knowledge and vision on the Han River water quality control, should be prepared to better deal with the budgeting and personnel management for the Han River water pollution control not only at the control government, but also at the Seoul city municipal government levels. Environmental issues should be kept distinct from political issues. Environmental issues should not serve as a window-dressing for sheer political purposes. Sixth, the Hah River proiect should also include, along with the main Han River basin, those areas covering North Han River, South Han River, and the tributaries to the main river basin. The 'Han River Basin Water Quality Control Board' should be established immediately as a means of strengthening the current Han River basin water quality control policy. Seventh, in drawing up the Han River proiect, the administrative officials should be aware that Han River basin is a life line for those people in the region, providing them with not only a sheer physical space, but with a psychological living space for their everyday life.

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Water Resources Management Challenge in the Citarum River Basin, Indonesia

  • Wicaksono, Albert;Yudianto, Doddi;Jeong, Gimoon;Kang, Doosun
    • 한국수자원학회:학술대회논문집
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    • 한국수자원학회 2016년도 학술발표회
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    • pp.198-198
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    • 2016
  • The Citarum River Basin is the biggest river basin in West Java Province, Indonesia and it plays strategic roles in providing water for irrigation, domestic and industrial uses, and power generation, besides controlling the flood during rainy season. Flowing through seven major cities makes the river flow and water demand are vulnerable to land use change around the river. The present water resources management has involved the regulator, operator, and users in deciding an appropriate water management plan for the entire basin. The plan includes an operation plan for three reservoirs, construction or maintenance of the river channel, and water allocation for all users along the river. Following this plan, a smaller operation group will execute and evaluates the plan based on the actual flow condition. Recently, a deforestation, environment degradation, river sedimentation, a rapid growth of population and industry, also public health become new issues that should be considered in water basin planning. Facing these arising issues, a new development program named ICWRMIP was established to advance the existing management system. This program includes actions to strengthen institutional collaboration, do the restoration and conservation of the river environment, improve water quality and public health, also advance the water allocation system. At present, the water allocation plan is created annually based on a forecasted flow data and water usage prediction report. Sometimes this method causes a difficulty for the operator when the actual flow condition is not the same as the prediction. Improving existing system, a lot of water allocation studies, including a development of the database and water allocation simulation model have been placed to help stakeholders decide the suitable planning schemes. In the future, this study also tries to contribute in advancing water allocation planning by creating an optimization model which ease stakeholders discover a suitable water allocation plan for individual users.

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하계망패턴의 특색으로 구분한 중국의 자연지역 (The Physical Region of China Divided by the Characteristics of Drainage Patterns.)

  • 황상일
    • 한국지역지리학회지
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    • 제2권1호
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    • pp.151-164
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    • 1996
  • 하계망은 유역분지의 지질, 지형, 기후 등의 영향을 예민하게 반영하면서 발달하므로, 하계망 패턴의 특징에 따른 지역구분은 자연환경을 종합적으로 이해하는데 중요한 의의를 갖는다. 본연구는 자연환경이 매우 다양한 중국을 대상으로 하계망특색을 통하여 자연지역구분을 시도하였다. 중국의 하계망은 크게 내륙하천유역분지와 의류하천유역분지로 나누어 지며, 내륙하천유역분지는 (1)난맥상(亂脈狀) 하폐망(deranged pattern)과 (2)구심상 하계 망으로, 의류하천유역분지는 (1)수지상 하재망, (2)평행상 하계망, (3)선상 하재망, (4)망상 하계망으로 나누어 진다. 내륙하천유역분지의 하계망형성에는 지형과 기후가 함께 영향을 미치고, 의류하천유역분지에서 나타나는 평행상 하계망은 주로 지반운동에 결과된 지질구조선, 선상 하계망은 황하의 범람으로 인한 유로변경, 망상 하계망은 인간의 활동 등과 같은 요인에 의한 것이다. 이들의 지역적 분포는 난맥상 하계망은 짱베이(장북(藏北))고원지역, 구심상 하계망은 건조분지지역, 평행상 하계망은 양쯔대지와 인도판 사이의 구조운동의 영향을 강하게 받고 있는 횡단산맥지역, 양쯔강 상류지역, 칭짱(청장(靑藏))고원 이남의 갠지즈(Ganges River)강 상류유역분지지역이며, 선상 하계망은 황하하류 선상지지역인 하이허(해하(海河)) 화이허(회하(淮河)강 유역분지지역이고, 망상 하계망은 양쯔강삼각주, 장쑤성북부해안 및 주장강(주강(珠江)) 삼각주지역이다. 이들 지역을 제외한 나머지 지역은 가장 일반적으로 볼 수 있는 수지상 하계망을 하고 있다.

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Study on Water Resources Allocation in the Lancangjiang River Basin of China

  • Ying, Gu;Heng, Liu;Jingnan, Liu;Sihua, Lei
    • 한국수자원학회:학술대회논문집
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    • 한국수자원학회 2006년도 학술발표회 논문집
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    • pp.36-44
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    • 2006
  • Based on water resources availability and development condition of the Lancang River, as well as considering the international river water resources characters, the paper put forwarded an integrated allocation way of the water resources of Lancang River Basin. According to the basic rules of equitable and suitable utilization of water resources of international rivers, water resources demand for domestic, industrial, irrigation and ecosystem system, and principles of society stabilities and the food safety etc, an index system of Lancang River water resources allocation was set up. Two levels scheme of Lancang River water allocation are proposed. First level is for an international water, which primarily to analysis the water quantity at the national boundary. Second level is for provincial water allocation among Qinghai, Yunnan provinces and Tibetan Autonomous Region. In the allocation schemes, the water resources development of Lancang River Basin at different scenarios and the related water allocation in different years and seasons were analyzed. A discharge to some cross sections of the river and a total amount water quantity for each district has been given as well.

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지형공간 특성자료를 이용한 하천유역의 강우-유출해석 (Rainfall-Runoff Analysis of River Basin Using Spatial Data)

  • 안승섭;이증석;도준현
    • 한국환경과학회지
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    • 제12권9호
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    • pp.949-955
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    • 2003
  • The subject basin of the research was the basin of Yeongcheon Dam located in the upper reaches of the Kumho River. The parameters of the model were derived from the results of abstracting topological properties out of rainfall-runoff observation data about heavy rains and Digital Elevation Modeling(DEM) materials. This research aimed at suggesting the applicability of the CELLMOD Model, a distribution-type model, in interpreting runoff based on the topological properties of a river basin, by carrying out runoff interpretation far heavy rains using the model. To examine the applicability of the model, the calculated peaking characteristics in the hydrograph was analyzed in comparison with observed values and interpretation results by the Clark Model. According to the result of analysis using the CELLMOD Model proposed in the present research for interpreting the rainfall-runoff process, the model reduced the physical uncertainty in the rainfall-runoff process, and consequently, generated improved results in forecasting river runoff. Therefore it was concluded that the algorithm is appropriate for interpreting rainfall-runoff in river basins. However, to enhance accuracy in interpreting rainfall-runoff it is necessary to supplement heavy rain patterns in subject basins and to subdivide a basin into minor basins for analysis. In addition, it is necessary to apply the model to basins that have sufficient observation data, and to identify the correlation between model parameters and the basin characteristics(channel characteristics).

IMPLEMENTATION OF A DECISION SUPPORT SYSTEM FOR INTEGRATED RIVER BASIN WATER MANAGEMENT IN KOREA

  • Shim Soon-Do;Shim Kyu-Cheoul
    • Water Engineering Research
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    • 제5권4호
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    • pp.157-176
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    • 2004
  • This research presents a prototype development and implementation of Decision Support System (DSS) for integrated river basin water management for the flood control. The DSS consists of Relational Database Management System, Hydrologic Data Monitoring System, Spatial Analysis Module, Spatial and Temporal Analysis for Rainfall Event Tool, Flood Forecasting Module, Real-Time Operation of Multi Reservoir System, and Dialog Module with Graphical User Interface and Graphic Display Systems. The developed DSS provides an automated process of alternative evaluation and selection within a flexible, fully integrated, interactive, centered relational database management system in a user-friendly computer environment. The river basin decision-maker for the flood control should expect that she or he could manage the flood events more effectively by fully grasping the hydrologic situation throughout the basin.

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한강유역 동시강우량 자료를 이용한 강우량-거리비의 산정 (Estimation of Depth-Length Ratios with the Han-River Basin's Simultaneous Rainfall Data)

  • 이원환;이길춘
    • 물과 미래
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    • 제20권1호
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    • pp.55-61
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    • 1987
  • 본 연구는 한강 유역의 고정된 지점 동시 강우자료의 빈도해석에 의하여 우량-거리비를 산정한 것이다. 우량- 거리비는 한강유역강우의 시공간상관구조를 파악하는데 근거를 제공한다. 우량-거리비는 거리증가에 따라 감소하고 강우 지속시간 증가에 따라 증가하며 재현기간 증가에 따라 약간 감소함을 나타내고 있다. 한강유역의 강우의 특성식을 특성계수와 함께 제시하였다.

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하천의 공간적 특성을 고려한 탁수평가 GIS DB 분석 (The Analysis of GIS DB for the Evaluation of Turbid Water Considering Spatial Characteristics of River Channel)

  • 박진혁;이근상
    • 한국측량학회지
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    • 제24권1호
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    • pp.19-26
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    • 2006
  • 안동호와 임하호는 서로 인접되어 있지만, 강우에 따른 탁수발생에는 큰 차이를 보이고 있다. 이러한 임하호 탁수발생의 주요원인으로는 유역내 지질암 및 하천주변의 농경지 분포특성이 지적되고 있다. 본 연구에서는 농업 과학기술원에서 구축한 정밀토양도를 이용하여 탁수에 가장 큰 영향을 주는 표토층의 퇴적암의 분포특성을 분석한 결과 임하호 유역의 퇴적암 분포가 안동호 유역에 비해 1.87배 높게 나타남을 알 수 있었다. 또한 하천의 완충구역을 고려한 퇴적암의 분포특성에서는 하천으로부터 1,600m 이내에서 임하호가 안동호에 비해 탁수발생에 취약한 특성을 보였다. 그리고 토지피복 분석에서는 하천구역 1,600m 내에서 임하호의 농경지 분포가 안동호에 비해 높게 나타났으며, 이러한 농경지 분포특성으로 식생피복인자도 임하호가 안동호에 비해 높게 평가되었다.