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http://dx.doi.org/10.17820/eri.2015.2.2.128

A Comparison of Geomorphological and Hydrological Methods for Delimitation of Flood Plain in the Mankyung River, Korea  

Kim, Ji-Sung (Department of Hydro Science and Engineering, Korea Institute of Civil Engineering and Building Technology)
Lee, Chan-Joo (Department of Hydro Science and Engineering, Korea Institute of Civil Engineering and Building Technology)
Kim, Joo-Hun (Department of Hydro Science and Engineering, Korea Institute of Civil Engineering and Building Technology)
Choi, Cheonkyu (Department of Hydro Science and Engineering, Korea Institute of Civil Engineering and Building Technology)
Kim, Kyu-Ho (Department of Hydro Science and Engineering, Korea Institute of Civil Engineering and Building Technology)
Publication Information
Ecology and Resilient Infrastructure / v.2, no.2, 2015 , pp. 128-136 More about this Journal
Abstract
River areas include channels, floodplains and all the areas affected by physical and ecological processes in river systems. It is noticeably different from present riparian zone which is bounded by dykes. In this study, two methods for delineation of a floodplain are proposed, which are used for evaluation of the function of a river. One of them is a geomorphology-based technique and the other is hydrology-based inundation analysis. For the Mankyung River, these two methods are applied to delineate the floodplain area. Areas delineated with both methods are mutually compared. The results show that the geomorphology-based method is suitable for the delineation of a valley bottom, including the floodplain in a broader sense, which is unlike an inundated area reflecting contemporary hydrologic conditions. Compared with other flood frequency areas, a 100-year flood inundation area was found reasonable to represent the spatial extent of a floodplain without regard to the longitudinal location along a river. However, it is necessary in certain rivers reach where the division of a channel exists to compare a geomorphological analysis on a valley bottom with an inundation area of different frequencies.
Keywords
Floodplain; HEC-RAS; LISFLOOD; Multi-resolution valley bottom flatness;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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