The Weight Estimation Approach of Stream Integrity Assessment Model in Terms of Eco-environmental Aspects A Case Study of Natural Tourism Site at Shihmen Reservoir
Resource
地理學報, 55, 065-095
Journal
地理學報
Journal Issue
55
Pages
065-095
Date Issued
2009-04
Date
2009-04
Author(s)
Chu, T.J.
Chen, H.C.
Kuo, Y.Y.
Cheng, A.S.
Fang, W.T.
Shih, C.H.
Abstract
Previous studies of eco-environmental quality assessment of streams have relied on single indicators. Few comprehensive assessments have been applied simultaneously. Different evaluation indicators owned their diverse variations thus, integrated assessment results with a number of indicators, have more explanatory capability. However, some difficulties occurred as to how to assess and estimate the weighting values of the indicators. This study aimed to use Structural Equation Modeling (SEM) to develop a new Stream Integrity Assessment Model (SIAM) to
combine indices’ weightings. In one case study, we conducted seasonal surveys at a Tahan Stream tributary with eight sampling stations in the Shihmen Reservoir watershed, at eight different times from 2003 to 2004. We used environmental and/or ecological factors including River Pollution Index (RPI), Index of Biotic Integrity (IBI), Qualitative Habitat Evaluation Index (CQHEI), Family-level Biotic Index (FBI), Rapid Bioassessment Protocol III (RBP III), Generic Index (GI), and Saprobity Index (SI). From the result of this SIAM for ecological quality assessment, the variation of the geographical distribution of the ecological quality was detected.
Subjects
結構方程模式
溪?評估指標
權重估計
structural equation modeling (SEM)
stream assessment indicators
estimated weighting
Type
journal article