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2023 Vol.65, Issue 6 Preview Page
A Sensitivity of Simulated Runoff Characteristics on the Different Spatial Resolutions of Precipitation Data

강우자료의 공간해상도에 따른 모의 유출특성 민감도 고찰

Dogil Leea
,
Syewoon Hwangb†
이 도길a
,
황 세운b†
aPh.D. Student, Agricultural and Biological Engineering Department, University of Florida
bAssociate Professor, Department of Agricultural Engineering (Institute of Agriculture and Life Science), Gyeongsang National University, Jinju, Republic of Korea
a플로리다 대학교 농업 및 생물 공학과 박사과정 학생
b대한민국 진주 경상대학교 농업공학과 (농업생명과학연구소) 부교수
† Corresponding author Tel.: +82-55-772-1934, Fax: +82-55-722-1930 E-mail: swhwang@gnu.ac.kr
2023. pp. 37-49
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Abstract

Rainfall data is one of the most important data in hydrologic modeling. In this study, the impacts of spatial resolution of precipitation data on hydrological responses were assessed using SWAT in the Santa Fe River Basin, Florida. High correlations were found between the FAWN and NLDAS rainfall data, which are observed weather data and simulated weather data based on observed data, respectively. FAWN-based scenarios had higher maximum rainfall and more rainfall days and events compared to NLDAS-based scenarios. Downstream areas showed lower correlations between rainfall and peak discharge than upstream areas due to the characteristics of study site. All scenarios did not show significant differences in base flow, and showed less than 5% of differences in high flows among NLDAS-based scenarios. The impact of resolution will appear differently depending on the characteristics of the watershed and topography and the applied model, and thus, is a process that must be considered in advance in runoff simulation research. The study suggests that applying the research method to watersheds in Korea may yield more pronounced results, and highlights the importance of considering data resolution in hydrologic modeling.

Keywords
SWAT
spatial resolution
precipitation
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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 :6
  • Pages :37-49
  • Received Date : 2023-06-09
  • Revised Date : 2023-10-12
  • Accepted Date : 2023-10-17
  • DOI :https://doi.org/10.5389/KSAE.2023.65.6.037
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