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2019 Vol.52, Issue 12 Preview Page

Research Article

Prediction on the amount of river water use using support vector machine with time series decomposition

TDSVM을 이용한 하천수 취수량 예측

Seo Hye Choia
,
Hyun-Han Kwonb
,
Moonhyung Parkc*
최 서혜a
,
권 현한b
,
박 문형c*
aResearcher, Korea Institute of Civil Engineering and Building Technology
bProfessor, Department of Civil & Environmental Engineering, Sejong University
cResearcher, Korea Institute of Civil Engineering and Building Technology
a한국건설기술연구원 국토보전연구본부 신진연구원
b세종대학교 건설환경공학과 응용수문연구실 교수
c한국건설기술연구원 국토보전연구본부 수석연구원
* Corresponding Author
31 December 2019. pp. 1075-1086
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Abstract

Recently, as the incidence of climate warming and abnormal climate increases, the forecasting of hydrological factors such as precipitation and river flow is getting more complicated, and the risk of water shortage is also increasing. Therefore, this study aims to develop a model for predicting the amount of water intake in mid-term. To this end, the correlation between water intake and meteorological factors, including temperature and precipitation, was used to select input factors. In addition, the amount of water intake increased with time series and seasonal characteristics were clearly shown. Thus, the preprocessing process was performed using the time series decomposition method, and the support vector machine (SVM) was applied to the residual to develop the river intake prediction model. This model has an error of 4.1% on average, which is higher accuracy than the SVM model without preprocessing. In particular, this model has an advantage in mid-term prediction for one to two months. It is expected that the water intake forecasting model developed in this study is useful to be applied for water allocation computation in the permission of river water use, water quality management, and drought measurement for sustainable and efficient management of water resources.

Keywords
The amount of water intake
Support vector machine
Time series decomposition
Prediction modeling, Drought

최근 기후 온난화의 발생과 이상기후의 발생빈도가 증가함에 따라 강수량, 하천유량과 같은 수문학적 요소의 예측이 복잡해지고 있으며 물부족 발생 위험도 증가하고 있다. 따라서 본 연구에서는 중단기 하천 취수량을 예측하기 위한 모델을 개발하고자 하였다. 입력인자를 선정하기 위해 취수량과 기상인자들 간의 상관성분석을 수행한 결과 온도가 가장 영향이 큰 것으로 나타났다. 또한 취수량은 시계열에 따른 증가 경향과 계절적 특성이 뚜렷하게 나타나므로 시계열분해기법을 이용하여 전처리를 수행하고 잔차에 대해 서포트 벡터 머신(SVM)을 적용하여 취수량 예측 모델을 개발하였다. 이 모델은 평균적으로 4.1%의 오차율을 나타내며, 전처리를 하지 않은 SVM 모델에 비해 높은 정확도를 나타냈다. 특히, 1∼2달에 대해 중단기 예측을 수행하였을 때 더 유리한 결과를 나타냈다. 본 연구에서 개발된 취수량 예측모델은 수자원의 지속가능하고 효율적인 관리를 위해 하천수 사용허가, 수질관리, 가뭄 대책 마련에 활용이 가능할 것으로 예상된다.

키워드
취수량
서포트벡터머신
시계열분해기법
예측 모델링
가뭄
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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 : 52
  • No :12
  • Pages :1075-1086
  • Received Date : 2019-10-29
  • Revised Date : 2019-11-03
  • Accepted Date : 2019-11-09
  • DOI :https://doi.org/10.3741/JKWRA.2019.52.12.1075
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