摘要
元谋侵蚀沟谷高投入开发治理具有一次性投入高、收效快、效益高特点，经济内部收益率５９％，投资回收年限４．２９ａ，经济效益费用比３．７１；植被覆盖率由＜１５％提高到９１％，土壤侵蚀模数由１６３８１ｔ／（ｋｍ２·ａ）减少到＜２００ｔ／（ｋｍ２·ａ）；流域的开发治理使住在沟口的居民安居乐业、１０８国道畅通．
Taken the exploitation and control of Ludouqing eroded gully, Yuanmou hot-dry valley,by high-input as example; analyses the benefits of the model as follows:1. Economic benefit is high, EIRR is 59%, ENPV is 30 ×104 yuan per ,EBCR is 3. 74, the time of returns on investment is 4. 08 years.2. The density of ground cover increased by 6 times, from less than 15 % to 91 %. The rate of erosion reduced by 97 %, from 16 381 t/(km2 ·a) before 1988 to less than 200 t/(km2·a) in 1994. The flood damage to the farmer who lived beside the mouth of Ludouqing eroded gully and 108 highway have been eliminated.3. The high benefits of the model increases confidence of exploitation & control of small watershed by farmers and society. The model is an excellence example for reforming the control of small watershed.
出处
《山地研究》
CSCD
1996年第3期194-198,共5页
关键词
小流域
开发治理
投资
侵蚀沟谷
经济效益
benefit,small watershed , development and harness,high-input, Yuanmou
