Stream Classification Based on the Ecological Characteristics for Effective Stream Management - In the Case of Nakdong River -

Abstract

The purpose of this research is classifying stream into different types depending on various factors from the perspective of stream corridor restoration and using it as basic data, which are used to consider efficient management and planning for the healthy stream according to the characteristic by types. In this study, 130 points of location of the Nakdong river basin which consist of various geographic factors have been chosen and hierarchical cluster analysis has been carried out in these points by using biological and physiochemical factors whose health can be considered to be predicted and evaluated.As a result of cluster analysis, there were three divided types. Type A whose biology and water quality are considered the best was the highest in forest area percentage so that it was classified into natural stream. Type B was classified into a rural region stream with a mixture of urban and agricultural region.Type C, with the most damaged water quality and biology health had the most urban region surface area and was named as urban region stream. Moreover, an overall restoration strategy according to

Regression Tree Analysis for Stream Biological Indicators Considering Spatial Autocorrelation

“…Benthic macroinvertebrates are important biotic components of the river ecosystem and a food source for fish. Since they are extremely sensitive to habitat disturbances, they serve as an important biological indicator [ 67 ]. They exhibit distinct differences in the cluster structure, such as the number of species and distribution of populations [ 68 ].…”