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http://dx.doi.org/10.17820/eri.2016.3.4.307

Development of Hydraulic Analysis and Assessment Models for the Restoration of Ecological Connectivity in Floodplains Isolated by Levees  

Chegal, Sun Dong (H2R Incorporation)
Cho, Gil Je (H2R Incorporation)
Kim, Chang Wan (H2R Incorporation)
Publication Information
Ecology and Resilient Infrastructure / v.3, no.4, 2016 , pp. 307-314 More about this Journal
Abstract
River restoration has recently been performed not only for the improvement of the artificial parts in the past but also for the restoration of abandoned river reaches which were blocked and isolated. For the restoration of abandoned river reaches, it is important to recover the hydraulic and ecological connectivity in the isolated space by longitudinal structures like levees. But because the assessment tools to determine whether the river restoration is performed properly are so rare at present, we aim to provide a tool for assessing ecological connectivity in a target river in this study. In the first step, one-dimensional numerical model for rainfall-runoff and channel routing was developed and then applied to the watershed of the Cheongmi Stream. In this step, a numerical model was developed to assess the restoration of connectivity. The model consists of two parts: one part is to convert the results of one-dimensional channel routing into two-dimensional spatial distribution. The other is to calculate the habitat suitability index according to time steps by using two-dimensional hydraulic features. The model was applied to a restoration area of the Cheongmi Stream. The advantage of this study is that two-dimensional hydraulic analysis can be easily obtained from one-dimensional hydraulic analysis without a complex and time-consuming two-dimensional analysis. HHS (Hydraulic Habitat Suitablility) by sections of target reaches and target species can be easily obtained using the results of this study.
Keywords
Channel routing; Habitat suitability index; Lateral connectivity; Numerical model; River restoration;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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