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The Relationship between Parameters of the SWAT Model and the Geomorphological Characteristics of a Watershed

SWAT 모형의 매개변수와 유역의 지형학적 특성 관계

Woong Hee Lee1
,
Ji Haeng Lee2
,
Ji Hun Park3
,
Heung Sik Choi1
이 웅희1
,
이 지행2
,
박 지훈3
,
최 흥식1
1Department of Civil Engineering, Sangji University
2Samhwa Construction and Environment
3Disaster Prevention Safety Institute
1상지대학교 토목공학과
2삼화건설환경㈜
3방재안전기술원
*교신저자. *Corresponding Author. 
31 March 2016. pp. 035-045
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Abstract

The correlation relationships and their corresponding equations between the geomorphological parameters and the Soil Water Assessment Tool (SWAT) model parameters by Sequential Uncertainty Fitting - version 2 (SUFI-2) algorithm of SWAT Calibration and Uncertainty Programs (SWAT-CUP) were developed at the Seom-river experimental watershed. The parameters of the SWAT model at the Soksa-river experimental watershed were estimated by the developed equations. The SWAT model parameters were estimated by SUFI-2 algorithm of SWAT-CUP with rainfall-runoff data from the Soksa-river experimental watershed from 2000 to 2007. Rainfall-runoff simulation of the SWAT model was carried out at the Soksa-river experimental watershed from 2000 to 2007 for the applicability of the estimated parameters by the developed equations. The root mean square errors (RMSE) between the observed and the simulated rainfall-runoffs using the estimated parameters by developed equations of correlation analysis and the optimum parameters by SUFI-2 of SWAT-CUP were 1.09 m3/s and 0.93 m3/s respectively at the Soksa-river experimental watershed from 2000 to 2007. Therefore, it is considered that the parameter estimation of the SWAT model by the geomorphological characteristics parameters has applicability.

Keywords
Geomorphological characteristics
Parameters
SUFI-2
SWAT-CUP

섬강 시험유역의 지형학적 특성 매개변수와 SWAT-CUP의 SUFI-2 알고리즘을 이용한 SWAT 모형 매개변수와의 상관관계와 이들의 관계식을 개발하였다. 개발한 상관 관계식을 이용하여 속사천 유역의 SWAT 모형의 매개변수를 추정하였다. 아울러, 속사천 유역의 2000 - 2007년의 강우-유출 자료를 대상으로 SWAT-CUP의 SUFI-2 알고리즘을 이용하여 SWAT 모형의 매개변수를 추정하였다. 개발한 식에 의해 산정한 각 매개변수의 적용성을 검토하기 위해 2000 - 2007년의 속사천 시험유역 자료를 이용하여 SWAT 모형의 유출모의를 실시하였다. 실측자료와 지형학적 특성 매개변수의 상관관계 분석으로 산정된 매개변수를 이용하여 속사천에 적용한 유출 모의결과와의 RMSE (root mean square error)는 1.09 m3/s이고, SWAT-CUP의 SUFI-2 최적 매개변수를 적용한 유출 모의결과와의 RMSE는 0.93 m3/s으로 나타났다. 따라서 지형학적 특성 매개변수를 이용한 SWAT 모형의 매개변수 추정이 적용성이 있다고 판단된다.

키워드
지형학적 특성
매개변수
SUFI-2
SWAT-CUP
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Information
  • Publisher :Korean Society of Ecology and Infrastructure Engineering
  • Publisher(Ko) :응용생태공학회
  • Journal Title :Ecology and Resilient Infrastructure
  • Journal Title(Ko) :응용생태공학회 논문집
  • Volume : 3
  • No :1
  • Pages :035-045
  • Received Date : 2016-02-04
  • Revised Date : 2016-03-11
  • Accepted Date : 2016-03-20
  • DOI :https://doi.org/10.17820/eri.2016.3.1.035
Journal Informaiton Ecology and Resilient Infrastructure Ecology and Resilient Infrastructure
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