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http://dx.doi.org/10.17820/eri.2015.2.2.118

An Application of Stream Classification Systems in the Nam River, Korea  

Kim, Kiheung (Department of Civil Engineering, Gyeongnam National University of Science and Technology)
Jung, Heareyn (Department of Civil Engineering, Gyeongnam National University of Science and Technology)
Publication Information
Ecology and Resilient Infrastructure / v.2, no.2, 2015 , pp. 118-127 More about this Journal
Abstract
Because streams have a great diversity of morphological features according to their reaches, it is necessary to classify the types of streams in order to assess their characteristics of channel. In addition, a quantitative assessment system for channel characteristics should be reflected in the stream type properties. Therefore, this study compares two stream classification system (Rosgen's and Yamamoto's) to review their applicability on Korean streams, and the two classification systems were applied on the Nam River. In order for the mean bed slope and the longitudinal connectivity of the provincial and national streams to be reflected in the assessment system of channel characteristics, the Yamamoto system is considered highly adaptable in the stream geomorphology side. In addition, it has been found the Rosgen system has a low correlation of bed slope compared to the Yamamoto system in the view of bed materials. On the other hand, the Yamamoto system was found to be capable of reflecting sediment sorting (hydraulic sorting) of the bed slope. According to the results obtained at the Nam River, the Rosgen system could not classify a type of stream by relationship between bed material and bed slope, but the Yamamoto system can verify the correlation of stream type. However, further review is needed with respect to the applicability of natural rivers. Three types of stream that can be applied to the assessment system of channel characteristics were proposed.
Keywords
Bed slope; Longitudinal connectivity; Morphological features; Stream type;
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