Study on the soil characteristics of potential landslide area at Chitou Compartment
| Autor: | Hsing-Hui Wu, 吳星輝 |
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| Rok vydání: | 2005 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 93 Two sampling sites with severe landslide damage in Chitou Compartment were selected for this study. They were Taiwania cryptomeria stand and Cryptomeria japonica stand from Da-Shuie moat. Five sampling points were selected from each of the upper slope, middle slope and lower slope for each sampling site at July 23 2002 and July 20 2003. There was no significant difference in terms of soil texture, CEC, and C/N ratio within the same year for the soil samples collected from 0-15 cm, 15-30 am and 30-60 cm.Three sampling points were selected from each slope to conduct standard penetration test (SPT) for each sampling site from May 2002 to March 2003. The Nc values at the upper and middle slopes were similar in Cryptomeria stand, but varied a lot at the lower slope. The Nc value varied the most at the lower slope in Taiwania and Cryptomeria stands from the continuous SPT. Porosity in Cryptomeria stands is more than in Taiwania stands. The bulk density increases with soil deeper but porosity decreases with soil deeper in both stands. The percentage of gravel weight was the most at the middle slope in Taiwania and Cryptomeria stands. In terms of the percentage of gravel weight in different soil depths at different slopes in each sampling site, there was no difference in Taiwania stand, but with the greatest in 15-30 cm in Cryptomeria stand. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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