Hydrologic analysis of a flood based on a new Digital Elevation Model
- 1Graduate School of Humanity-Oriented Science and Engineering, Kinki University, 8208555 Iizuka city, Fukuoka, Japan
- 2Dept. of Information Science, School of Humanity-Oriented Science and Engineering, Kinki University, 8208555 Iizuka city, Fukuoka, Japan
Keywords: Hydrologic analysis, DEM, GIS, HEC-HMS, Flood, Natural disaster
Abstract. These The present study aims to simulate the hydrologic processes of a flood, based on a new, highly accurate Digital Elevation Model (DEM). The DEM is provided by the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) of Japan, and has a spatial resolution of five meters. It was generated by the new National Project in 2012. The Hydrologic Engineering Center - Hydrologic Modeling System (HEC-HMS) is used to simulate the hydrologic process of a flood of the Onga River in Iizuka City, Japan. A large flood event in the typhoon season in 2003 caused serious damage around the Iizuka City area. Precise records of rainfall data from the Automated Meteorological Data Acquisition System (AMeDAS) were input into the HEC-HMS. The estimated flood area of the simulation results by HEC-HMS was identical to the observed flood area. A watershed aggregation map is also generated by HEC-HMS around the Onga River.