물수지 기반 농업용 저수지 내한능력 및 이수안전도 평가
Evaluation of Water Supply Reliability in Agricultural Reservoirs Using Water Balance Analysis
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초록
Most agricultural reservoirs were built between the 1940s and 1970s. Therefore, it is necessary to evaluate the current water supply safety, consideringchanges in water capacity, the water management, and environment in relation to the passage of time.. The design frequency of drought, the numberof years areservoir needs to be able to withstand a drought phenomenon, foragricultural water resources in Korea is the 10-year drought. As the watersupply system and water supply patterns change, it is necessary to establish a concept of water supply reliability, which refers to the stability of watersupply. This study evaluated the water supply reliability of agricultural reservoirs based on the designed frequency. The previously designed frequencyand water balance analysis were used to calculate and analyze reservoir storage capacity, water supply turnover, water supply amount, water supplypotential, water utilization safety, and water supply reliability. As a result, Yongmyeon Reservoir was found to be stable in terms of water supplyreliability, whereas Seongho and Yongpung Reservoirs were found to be unstable using all methods. In particular, when converting the water utilizationsafety and the water supply reliability to the frequency of drought, Seongho and Yongpung Reservoir were in the lowest class, with a frequency ofdrought less than four years. Thus, we recommend that the consideration of water supply reliability be included in the preparation of adaptive measuresand water supply strategies as changes in environmental conditions continue to develop.
Abstract
Most agricultural reservoirs were built between the 1940s and 1970s. Therefore, it is necessary to evaluate the current water supply safety, consideringchanges in water capacity, the water management, and environment in relation to the passage of time.. The design frequency of drought, the numberof years areservoir needs to be able to withstand a drought phenomenon, foragricultural water resources in Korea is the 10-year drought. As the watersupply system and water supply patterns change, it is necessary to establish a concept of water supply reliability, which refers to the stability of watersupply. This study evaluated the water supply reliability of agricultural reservoirs based on the designed frequency. The previously designed frequencyand water balance analysis were used to calculate and analyze reservoir storage capacity, water supply turnover, water supply amount, water supplypotential, water utilization safety, and water supply reliability. As a result, Yongmyeon Reservoir was found to be stable in terms of water supplyreliability, whereas Seongho and Yongpung Reservoirs were found to be unstable using all methods. In particular, when converting the water utilizationsafety and the water supply reliability to the frequency of drought, Seongho and Yongpung Reservoir were in the lowest class, with a frequency ofdrought less than four years. Thus, we recommend that the consideration of water supply reliability be included in the preparation of adaptive measuresand water supply strategies as changes in environmental conditions continue to develop.
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