山西省西山地区退耕还林效益评价

山西省西山地区生态环境系统十分脆弱,历来以水土流失严重而受到广泛关注。退耕还林工程的实施有力地促进了西山地区生态环境的改善,并对当地经济社会的可持续发展产生了深远的影响。对退耕还林工程效益进行评价,能够反映出工程实施对区域生态、社会、经济产生的影响。以山西省吉县为例,采用综合评价法,对其2000—2008年间的退耕还林工程进行生态、社会、经济效益综合评价和效益分析。结果表明,吉县退耕还林工程效益2000年为负值,从2001年开始发挥出来,2000—2008年间综合效益逐年增加,在时间序列上呈积累式增加趋势。

Benefits Evaluation of Converting Farm Land to Forest in West Mountain Area of Shanxi Province

The ecological system of the western mountains in Shanxi Province is vulnerable,and soil and water loss has been widely recognized for long time.T he application of converting farm land to forest has efficiently improved ecological environment of the region,profoundly influencing the sustainable development of regional economy of the society.T he comprehensive assessment of converting farm land to forest can provide information regarding the effects of engineering implementation on the society,economy and ecology.Taking Jixian County of Shanxi Province as an example,this study evaluated and analyzed the comprehensive ecological,social,and economic effects of the conversion application between 2000 - 2008.T he results indicate that the comprehensive effect of the conversion in Jixian County was started as negative in 2000,but then increased substantially since the start of 2001.