A study of conservation index and priority restoration in the rural communities
| Autor: | Ying-Jhen Chen, 陳盈蓁 |
|---|---|
| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 Culture and life style are gradually vanishing due to the immigration of population and industry in the most rural communities. However, people are awaked to pay more attention on the rural development accompanying the promotion of revitalization in rural community. Spatial distribution of existing rural buildings affects whether success or not in environmental construction. Contagion type shows more environmental carrying capacity in pollution drainage compare to dispersion one and should have the larger green belts to buffer with. Hence, how to quantify and estimate the spatial distribution of rural building and/or vegetation is an important issue for providing the index of green field demand. In addition, typhoon Morakot occurred in 2009 caused serious landslide disaster for several rural communities in southern Taiwan. Examining the factors that cause the disaster, assessing the safety and setting the restoration priority for the rural communities are also vital issues discussed in this study. Coverage of land use derived from Land Use Investigation of Taiwan is employed in this study to extract the spatial dispersion index (SDI) of the rural buildings and vegetation. A detail discussion is focusing on the selected twelve rural communities to depict the similarity of the communities using SDI classifier. Discrimination analysis and Promethee theory are used to establish calamity types of landslide and/or dredging priority for the rural communities, which are vulnerable to debris disaster. Results show that counties in northern Taiwan except Yilan County having the higher SDI value, follows the counties in eastern Taiwan and those in southern Taiwan with lower SDI. In other words, northern counties show dispersion distribution while southern counties contagious. Wumile and Pingho show much similar community pattern which belongs to contagion type with more environmental carrying capacity, and the vegetation is mostly occupied by the grassland. There is a need to improve the green environment due to unstable vegetation type in the both communities. Forty-seven rural communities are selected from the disaster sites caused by the typhoon Morakot for establishing the landslide calamity model by means of slope, road density, river density, precipitation and vegetation cover ratio of the communities, and setting the dredging priority by using the factors of distance to river, elevation difference of riparian area, watershed landslide ratio. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|