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2017 Vol.50, Issue 12 Preview Page
Optimal parameter derivation for Muskingum method in consideration of lateral inflow and travel time

측방유입유량 및 유하시간을 고려한 Muskingum 최적 매개변수 도출

Sang Ho Kima
,
Ji-sung Kimb
,
Chang Hee Leec*
김 상호a
,
김 지성b
,
이 창희c*
aDepartment of Civil Engineering, Sangji University
bHydro Science and Engineering Research Institute, Korea Institute of Civil engineering and building Technology
cDepartment of Renewable Energy Resources, Jungwon University
a상지대학교 이공과대학 건설시스템공학과
b한국건설기술연구원 수자원․ 하천연구소
c중원대학교 이공대학 신재생에너지자원학과
*교신저자. *Corresponding Author. 
31 December 2017. pp. 827-836
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Abstract

The most important parameters of the Muskingum method, widely used in hydrologic river routing, are the storage coefficient and the weighting factor. The Muskingum method does not consider the lateral inflow from the upstream to the downstream, but the lateral inflow actually occurs due to the rainfall on the watershed. As a result, it is very difficult to estimate the storage coefficient and the weighting factor by using the actual data of upstream and downstream. In this study, the flow without the lateral inflow was calculated from the river flow through the hydraulic flood routing by using the HEC-RAS one-dimensional unsteady flow model, and the method of the storage coefficient and the weighting factor calculation is presented. Considering that the storage coefficient relates to the travel time, the empirical travel time formulas used in the establishment of the domestic river basin plan were applied as the storage coefficient, and the simulation results were compared and analyzed. Finally, we have developed a formula for calculating the travel time considering the flow rate, and proposed a method to perform flood routing by updating the travel time according to the inflow change. The rise and fall process of the flow rate, the peak flow rate, and the peak time are well simulated when the travel time in consideration of the flow rate is applied as the storage coefficient.

Keywords
Channel flood routing
Muskingum
Travel time
Storage constant
Lateral inflow

최근 송 ․ 배수시스템의 최적 펌프운영과 펌프 및 배수지의 적정용량 산정을 위한 다양한 연구가 진행되고 있다. 시설물의 적정 용량을 선정하기 에 앞서 송수펌프 용량 및 배수지규모에 따른 시스템 비용(건설 및 운영비용) 과 시스템 내 수질 변화를 분석하는 과정이 필요하다. 본 연구에서는 민감도 분석을 통해 송수펌프 용량과 배수지의 크기가 실제 시스템의 건설 및 운영비용, 그리고 시스템 전반의 수질에 미치는 영향을 분석하였다. 국내 대규모 지방상수도 시스템을 대상으로 분석을 실시하여 시설물 규모가 비용 및 수질에 미치는 영향을 명확히 파악하였다. 적용 네트워크의 경 우, 시설물의 용량이 증가할수록 운영비용은 감소하지만, 설계비용은 증가하는 것으로 나타났으며, 이를 통해 비용최소화와 수질안정화를 동시에 만족하는 시설물의 적정용량 범위를 파악할 수 있을 것으로 판단된다.

키워드
하도홍수추적
Muskingum
유하시간
저류상수
측방유입유량
References
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Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 50
  • No :12
  • Pages :827-836
  • Received Date : 2017-09-17
  • Revised Date : 2017-10-17
  • Accepted Date : 2017-10-17
  • DOI :https://doi.org/10.3741/JKWRA.2017.50.12.827
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