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The Analysis of Flood in an Ungauged Watershed using Remotely Sensed and Geospatial Datasets (I) - Focus on Estimation of Flood Discharge -

원격탐사와 공간정보를 활용한 미계측 유역 홍수범람 해석에 관한 연구(I) - 홍수량 산정을 중심으로 -

Son, Ahlong;Kim, Jongpil
손아롱;김종필

  • Received : 2019.08.30
  • Accepted : 2019.10.07
  • Published : 2019.10.31

Abstract

This study attempted to simulate the flood discharge in the Duman River basin containing Hoeryong City and Musan County of North Korea where were damaged from Typhoon Lionrock on August, 2016. For hydrological modelling remotely sensed datasets were used to estimate watershed properties and hydrologic factors because the basin is ungauged where hydrological observation is not exist or sparse. For validation we applied our methodology and datasets to the Soyanggang Dam basin. It has not only similar shape factor and compactness ratio to those of the target basin but also accurate, adequate, and abundant measurements. The results showed that the flood discharge from Typhoon Lionrock corresponded to three to five years design floods in the Duman River basin. This indicate that the Duman River basin has a high risk of flood in the near future. Finally this study demonstrated that remotely sensed data and geographic information could be utilized to simulate flood discharge in an ungauged watershed.

Keywords

Remote Sensing;Ungauged Watershed;North Korea;Flood;Typhoon

Acknowledgement

Grant : 위성자료 활용 현업지원 기술개발

Supported by : 국립재난안전연구원