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2023 Vol.65, Issue 4 Preview Page
Inundation Analysis of Agricultural Basin Considering Agricultural Drainage Hydrological Plan and Critical Rainfall Duration

농지배수 수문설계 기준과 임계지속기간을 고려한 농업 소유역 침수분석

Kwihoon Kima
,
Sang-Min Junb
,
Moon Seong Kangc
,
Jin-Yong Choid†
김 귀훈a
,
전 상민b
,
강 문성c
,
최 진용d†
a Ph.D. Student, Department of Rural Systems Engineering, Seoul National University
bResearch Scientist, Climate Change Assessment Division, National Institute of Agricultural Sciences
cProfessor, Department of Rural Systems Engineering, Research Institute of Agriculture and Life Scienses, Institute of Green Bio Science and Technology, Seoul National University
dProfessor, Department of Rural Systems Engineering, Research Institute of Agriculture and Life Sciences, Globel Smart Farm Convergence Major, Seoul National University
a 서울대학교 농촌시스템공학과 박사과정 학생
b국립 농업 과학원 기후 변화 평가과 연구 과학자
c서울대학교 농업생명과학대학 농업생명과학연구소 농촌시스템공학과 교수, 서울대학교 그린바이오과학기술원 교수
d서울대학교 농업생명과학연구원 글로컬스마트팜융합전공 농촌시스템공학과 교수, 서울대학교 농업생명과학연구원 농업생명공학부 교수
† Corresponding author Tel.: +82-2-880-4583, Fax: +82-2-873-2087 E-mail: iamchoi@snu.ac.kr
2023. pp. 25-32
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Abstract

KDS (Korean Design Standard) for agricultural drainage is a planning standard that helps determine the appropriate capacity and type of drainage facilities. The objective of this study was to analyze the inundation of the agricultural basin considering the current design standard and the critical rainfall duration. This study used the rainfall durations of 1-48 hour, and the time distribution method with the Chicago and the modified Huff model. For the runoff model, the NRCS (Natural Resources Conservation Service) unit hydrograph method was applied, and the inundation depth and duration were analyzed using area-elevation data. From the inundation analysis using the modified Huff method with different rainfall durations, 4 hours showed the largest peak discharge, and 11 hours showed the largest inundation depth. From the comparison analysis with the current method (Chicago method with a duration of 48 hours) and the modified Huff method applying critical rainfall duration, the current method showed less peak discharge and lower inundation depth compared to the modified Huff method. From the simulation of changing values of drainage rate, the duration of 11 hours showed larger inundation depth and duration compared to the duration of 4 hours. Accordingly, the modified Huff method with the critical rainfall duration would likely be a safer design than the current method. Also, a process of choosing a design hydrograph considering the inundation depth and duration is needed to apply the critical rainfall duration. This study is expected to be helpful for the theoretical basis of the agricultural drainage design standards.

Keywords
Agricultural drainage standard
critical rainfall duration
time distribution
inundation analysis
modified Huff model
References

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Information
  • Publisher :The Korean Society of Agricultural Engineers
  • Publisher(Ko) :한국농공학회
  • Journal Title :Journal of Korean Society of Agricultural Engineers
  • Journal Title(Ko) :한국농공학회논문집
  • Volume : 65
  • No :4
  • Pages :25-32
  • Received Date : 2023-02-12
  • Revised Date : 2023-04-25
  • Accepted Date : 2023-05-08
  • DOI :https://doi.org/10.5389/KSAE.2023.65.4.025
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