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| 2009/09/08 15:45:52瀏覽620｜回應0｜推薦1 | |
這是一篇關心台灣土石流議題的外國朋友寫給政府並轉寄給我看的信 信中提到一種根部很深的草，可以有效預防土石流。 In 2007 my fourth book was published in My research for the book led me to a remarkable discovery that should be brought to your attention. Vetiver (known in Why? It can prevent or minimize soil erosion, mudslides and general flooding. How? Note the following from an online description of Veitiver:
Unlike most grasses, Vetiver does not form a horizontal mat of roots; rather, the roots grow almost exclusively downward, 2–4 meters. This makes vetiver an excellent stabilizing hedge for stream banks, terraces, and rice paddies. The close growing stems also help to block the runoff of surface water. Vetiver is noninvasive and can easily be controlled by cultivation of the soil at the boundary of the hedge. According to The Vetiver Network International, a system of planting the grass has been successfully used for soil erosion control, slope protection, and disaster mitigation. Of particular importance to Slope Protection: The combination of deep roots with tensile strength of 75 MPa that improve the shear strength of soil by as much as 40% makes Vetiver grass an ideal plant for stabilizing steep and unstable slopes. The Vetiver System when applied to such slopes significantly reduces the probability of land slippage and reduces the need for “hard solutions”. Applications include highway, railway, riverbanks, public utility right of ways, canal, dikes, and levee slopes. The Vetiver Network International, based in I can also be reached by email for further information at g7429@ms38.hinet.net. Thank you for allowing me to add this treasure to your current research. Sincerely, Guy M. Redmer 如果沒有特別的台灣原生種生態考量，似乎可以考慮再容易有土石流的地方種植這種草類。 |
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| ( 時事評論｜環保生態 ) |
