Estimation of discharge coefficients of the broad-crested side weir with various levee's side slope of main channel

Ho-Seon Kang; Hong-Je Cho

doi:10.3741/JKWRA.2016.49.11.941

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2016 Vol.49, Issue 11 Preview Page Next Page

Estimation of discharge coefficients of the broad-crested side weir with various levee's side slope of main channel 본류수로의 제방사면경사에 따른 광정횡월류위어의 유량계수 산정

30 November 2016. pp. 941-949

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Abstract

The flow characteristics of the broad-crested side weir considering the levee’s side slope of main channel (ES_ch) was investigated through hydraulic experiment in order to estimate the discharge coefficient equation. For applicability to actual river, levee’s side slope of main channel 1:0.5, 1:1 and 1:2 were selected. Experimental results show that the new estimated equation for the discharge coefficient including ESch is reasonable and effective in actual applications by comparing estimated and measured discharge over side weirs. Through a multiple linear regression analysis the importance of variabes were ordered as ES_ch > h/y_u > L/y_u > Fr_u. Especially the discharge coefficient equation without Fru was suggested, and the high applicability was reviewed by comparing the measured and calculated overflow of broad-chested side weir.

Keywords

Levee’s side slope

Hydraulic experiment

Discharge coefficient

Broad-crested side weir

국본 연구에서는 본류수로의 제방사면경사(ES_ch)에 따른 광정횡월류위어에서의 흐름변화를 수리모형실험을 통해 분석하고, 그에 따른 유량계수산정식을 제시하였다. 제방사면경사는 실제 하천에서의 적용성을 고려하여 1:0.5, 1:1, 1:2를 선정하였다. 제방사면경사가 포함된 광정횡월류위어의 유량계수산정식은 기존의 유량계수산정식 보다 합리적이고 적용성이 높은 것으로 확인되었다. 다중회귀분석결과 변수 중 본류수로의 제방사면경사(ES_ch)>횡월류위어높이-상류수심비(h/y_u)>횡월류위어길이-상류수심비(L/y_u)>상류 푸르드수(Fr_u)의 순서로 중요도가 높은 것으로 나타났다. 특히 기존의 연구와 개수로 흐름에서 가장 중요한 인자인 Froude수가 포함되지 않은 유량계수산정식을 제안하였으며, 그 적용성도 높은 것으로 나타났다.

키워드

제방사면경사

수리모형실험

유량계수

광정횡월류위어

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 : 49
No :11
Pages :941-949
Received Date : 2016-07-13
Revised Date : 2016-09-22
Accepted Date : 2016-09-29
DOI :https://doi.org/10.3741/JKWRA.2016.49.11.941

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

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