A Study of Vegetation Soil Permeability

• Main Authors: Huang, Hsin-Jen, 黃信仁
• Other Authors: Tsou, I
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/32292530801772290931

碩士 === 國立屏東科技大學 === 土木工程系所 === 102 === Ecological Engineering Method is one of the most broadly suggested designs for construction to sustain the environmental balance. The purpose of this research is trying to estimate the influence of vegetation characteristics on permeability of composed soil which planted with Bahia and Bermuda grass. The study select the soil of the Dong-Gang river as the culture soil in the experiment. Bahia grass and Bermuda grass was planted by the design density and compaction to precede the constant head permeability test, root physical test and tensile test. The study analyzed the effect of permeability under different factors such as growth periods and compaction. The results show that the RD and RLD of Bahia grass is larger than Bermuda grass, at standard density soil sample. RD changed from 75.45 g/m3 to 269.11 g/m3 which increased 4 times, so the soil gripped well for Bahia grass. The second part of this study set up an experiment of constant head permeability with multi materials of Bahia grass, Bermuda grass and soil. The result shows that the permeability of Bahia grass sample increased by increasing the plant density and days. For standard sample growth period example, it changed from 0.0076 cm/s to 0.0132 cm/s. While Bermuda grass, on the contrary, the permeability decreased by increasing the plant density and days. For standard sample growth period example, it changed from 0.0125 cm/s to 0.0055 cm/s.