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실측 하천 단면자료를 이용한 HSPF 유역모델의 수리정확도 개선

Improving HSPF Model's Hydraulic Accuracy with FTABLES Based on Surveyed Cross Sections

  • 신창민 (국립환경과학원 물환경연구부 물환경평가연구과)
  • Shin, Chang Min (Water Quality Assessment Research Division, National Institute of Environment Research)
  • 투고 : 2016.11.07
  • 심사 : 2016.11.29
  • 발행 : 2016.11.30

초록

The hydrological simulation program FORTRAN (HSPF) is a comprehensive watershed model that employs the hydraulic function table (FTABLE) (depth-area-volume-flow relationship) to represent the geometric and hydraulic properties of water bodies. The hydraulic representation of the HSPF model mainly depends on the accuracy of the FTABLES. These hydraulic representations determine the response time of water quality state variables and also control the scour, deposition, and transport of sediments in the water body. In general, FTABLES are automatically generated based on reach information such as mean depth, mean width, length, and slope along with a set of standard assumptions about the geometry and hydraulics of the channel, so these FTABLES are unable to accurately describe the geometry and hydraulic behavior of rivers and reservoirs. In order to compensate the weakness of HSPF for hydraulic modeling, we generated alternate method to improve the accuracy of FTABLES for rivers, using the surveyed cross sections and rating curves. The alternative method is based on the hydraulics simulated by HEC-RAS using the surveyed cross sections and rating curves, and it could significantly improve the accuracy of FTABLES. Although the alternate FTABLE greatly improved the hydraulic accuracy of the HSPF model, it had little effect on the hydrological simulation.

키워드

참고문헌

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