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2017 Vol.50, Issue 12 Preview Page
Development of Land Surface Model for Soyang river basin

소양강댐 유역에 대한 지표수문모형의 구축

Jaehyeona Leea
,
Huidae Chob
,
Minha Choic
,
Dongkyun Kima*
이 재현a
,
조 희대b
,
최 민하c
,
김 동균a*
aDepartment of Civil Engineering, Hongik University
bDepartment of Civil and Construction Engineering, Southern Polytechnic College of Engineering and Engineering Technology,Kennesaw State University
cDepartment of Water Resources, Graduate School of Water Resources, Sungkyunkwan University
a홍익대학교 토목공학과
b미국 케네소주립대학교 서던폴리테크닉공과대학 토목건설공학과
c성균관대학교 수자원대학원 수자원학과
*교신저자. *Corresponding Author. 
31 December 2017. pp. 837-847
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Abstract

Land Surface Model (LSM) was developed for the Soyang river basin located in Korean Peninsula to clarify the spatio-temporal variability of hydrological weather parameters. Variable Infiltration Capacity (VIC) model was used as a LSM. The spatial resolution of the model was 10 km and the time resolution was 1 day. Based on the daily flow data from 2007 to 2010, the 7 parameters of the model were calibrated using the Isolated Particle Swarm Optimization algorithm and the model was verified using the daily flow data from 2011 to 2014. The model showed a Nash-Sutcliffe Coefficient of 0.90 and a correlation coefficient of 0.95 for both calibration and validation periods. The hydrometeorological variables estimated for the Soyang river basin reflected well the seasonal characteristics of summer rainfall concentration, the change of short and shortwave radiation due to temperature change, the change of surface temperature, the evaporation and vegetation increase in the cover layer, and the corresponding change in total evapotranspiration. The model soil moisture data was compared with in-situ soil moisture data. The slope of the trend line relating the two data was 1.087 and correlation coefficient was 0.723 for the Spring, Summer and Fall season. The result of this study suggests that the LSM can be used as a powerful tool in developing precise and efficient water resources plans by providing accurate understanding on the spatio-temporal variation of hydrometeorological variables.

Keywords
Land Surface Model
VIC model
Soil moisture
Particle Swarm Optimization

연구에서는 소양강댐 유역의 수문기상인자들의 시공간적 변동성을 명확히 파악하기 위하여 지표해석모형을 구축하였다. 지표해석 모형으로 는 Variable Infiltration Capacity (VIC) 모형을 사용하였으며, 모형의 공간 해상도는 10 km, 시간 해상도는 1일로 정하였다. 2007~2010년 기 간의 일유량자료를 바탕으로 Isolated Particle Swarm Optimization 알고리즘을 사용하여 모형의 7개 매개변수를 보정하였고, 2011~2014년 기간의 일유량자료를 사용하여 모형을 검증하였다. 보정된 모형은 보정기간과 검증기간 모두에 대하여 0.90의 Nash-Sutcliffe Coefficient값과 0.95의 상관계수를 보였다. 소양강댐유역에 대하여 산출된 인자들은 여름철에 강우가 집중되어있는 우리나라의 계절적인 특성과 기온변화로 인 한 장 ․ 단파 복사량의 변화와, 지표면 온도의 변화, 이로 인해 피복층에서의 증발과 식생 증산의 변화가 고려되어 총 증발산이 변화하는 경향이 잘 반영된 것으로 나타났다. 산출된 수문인자를 검증하기 위하여 지상관측토양수분자료와 비교하였다. 겨울철을 제외한 4~11월의 비교결과 두 자료 의 추세선의 기울기는 1.087로 나타났고, 상관계수는 0.723의 값을 나타냈다. 이러한 본 연구의 결과는 지표해석모형이 우리나라 주요 댐 유역의 수문기상인자의 시공간적인 변화를 정확히 파악하는데 활용될 수 있으며, 나아가서는 더욱 정밀하고 효율적인 수자원계획을 수립하는 데에도 활 용될 수 있다는 점을 시사한다.

키워드
지표해석모형
VIC model
토양수분
입자군집최적화
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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 :837-847
  • Received Date : 2017-03-22
  • Revised Date : 2017-10-17
  • Accepted Date : 2017-10-18
  • DOI :https://doi.org/10.3741/JKWRA.2017.50.12.837
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