The study of planning and designing efficiency assessment method for ecological engineering of hydraulic constructions at agricultural fields
Date Issued
2008
Date
2008
Author(s)
Yang, Bo-yu
Abstract
The purpose of this program is to set up and verify efficiency assessment method for ecological engineering of hydraulic constructions at agricultural fields, in order to provide useful suggestions for engineering planning and designing improvement. The efficiency assessment index system for ecological engineering of hydraulic constructions at agricultural fields, mainly constructed by Analytic Hierarchy Process (AHP) from expert questionary, is tested and verified by choosing seven irrigation systems based on ecological engineering in Yiland county, Hualien county, and Taitung county as ecological engineering experiment sites. The results show that the method are suitable for irrigation canals and drainage canals during experimental period (year 2006 to 2007), except that there are some indexes that have relations with large scales in region and time are not precise enough due to our experiment area centralizing in the eastern Taiwan and been put into practice for only a short time. Furthermore, the site selection and benefits evaluation system is put to the proof to be representative and accurate by the in-site fish collection data and the IBI index. The result of benefit evaluations indicator system show that the seven location built by ecological engineering will help to distinguish the integration of local ecological network and irrigated ecological systems. The biomass, IBI index and results of ecological efficiency assessment are best of Yongcyuan waterway and in Taitung and Kolin Yongcyuan waterway in Yiland for irrigation canals and drainage canals respectively. Thus, the results can be an reference point of other locations selecting in future, benefit evaluating, design and construction.
Subjects
waterway
habitat
IBI index
Analytic Hierarchy Process (AHP)
efficiency assessment method
Type
thesis
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