A Study on the Ecological Impact Factors of Stream Area
| Autor: | Hsin-hua Liu, 劉欣樺 |
|---|---|
| Rok vydání: | 2005 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 93 Engineering construction induced environmental impact and ecological catastrophe in Taiwan. The landscape, river territory, and terrain in the upstream are subjected a great change, that came to a consequence of ecological damage, muddy flow and unusual inundation in the urban area. The concept of “ECOLOGICAL ENGINEERING” is promoted by many of the governmental bureau to minimize negative effects of un-avoid constructions. Among the official proposed cases of engineering, the river or stream renovation occupied a certain ratio and acted important role in these years. This thesis intents to discuss the effect of impaction of construction in the river area, and explores the priority of factors affecting the river status quo. Some of the professors and graduated students were inquired as the modified Delphi method, to find out the important parameters in river regime a in the first step. Analytic Hierarchy Process (AHP) was used to rank the degree of importance among these parameters in the second step. One hundred and twenty questionnaires were send out for seven graduate schools and eight nine are valid. The final result shows that the lowing ecological impaction is more important the promoting ecological conservation at the level one analysis. Nine factors at level two are ranked as 1. Maintain the water quality, 2. Avoid the sensitive area, 3. Deliberate the continuity of vegetation, 4. Maintain the basic ecological flow, 5. Adopt the local materials, 6. Create the diversity of habit, 7. Establish the ecological corridors, 8. Maintain good environment for migrants’ species, 9. Detail survey on the representative species. A statistical test on the validation of final result gives there are no significant difference among the sampling schools. The water quality maintaining and avoidance about sensitive zone are the prior factors among the proposed factors. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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