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A Comparison Study of Bioengineering Streambank Types
Taiwan's river environments are ecologically fragile, excessive practice of concrete construction work for remediation seriously affected riparian zones. The purposes of this study were: (1) to establish factors and importance of River Bioengineering Stream revetment Types, (2) to explore the different views of different professional backgrounds on the types, and (3) to assess benefit of the domestic applications of the river embankment. Interpretive Structure Modeling (ISM) was used to establish framework with economic, security, ecological and aesthetics four dimensions and 12 factors. Then Analytic Hierarchy Process (AHP) was used to weight the relative importance of each factor. The results showed that (1) security was the most important, followed by ecology, economic and aesthetic benefits; (2)Among the 14 revetment types, pitched stone revetment had the highest overall evaluation, followed by grouted stone revetment, and concrete frame stone infill and vegetated revetment. The lowest scores were blanket revetment, stake and infill roll revetment, and stacked cellular confinement revetment. (3)Different fields of expertise only showed significant differences in grouted stone revetment, indicating a consistent professional opinion. Finally, the study proposed an eco-engineering revetment model appraisal sheet to provide practitioners the capability of evaluating the appropriate construction designs under different environment and functional requirements to decide the location-based revetment constructions.
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