Assessment of Applying Hydrology Subindex of Index of Stram Condition (ISC) on Ecological habitats of Upstream Creek
Date Issued
2010
Date
2010
Author(s)
Lin, Chi
Abstract
There are many kinds of assessments on ecological habitat of stream due to the different regions and localities. This study targeted at torrents, which have less contamination and more ecological potential restoration comparing with downstream ones and chose Index of Stream Condition, developed by the State of Victoria in Austria, which is included in physical, chemical and botanical indexes and easier use for engineers, especially. In which, the hydrology sub-index is modified by this study and is represented by rainfall variation.
This study selects the habitat methods which is applicable to the upstream torrents of Taiwan from a variety of instream flow methods, analyzes the research factors of fishes by the references of ecologic surveying and the limit of field investigation. The statistic analysis showed that the relation between rainfall variation and the ecological factors are significant. The ecological factor is estimated by rainfall variation, and the hydrology sub-index used to calculate by flow variation is modified by calculating by rainfall variation.
This study applies modified factor to access the upstream watershed from Chinmei bridge of Chienshih. Comparing with Tsai’s model, the modified model of this study significantly represents the better result on the variation of ecological environment. Moreover, the model of this study shows more feasible in calculating method, data appropriateness, the efficiency of data collection or application for upstream torrents in Taiwan.
Subjects
Index of Stream Condition (ISC)
Multiple Regression Analysis
Rainfall variation
Type
thesis
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