摘要
在分析资料的基础上,研究了岷江上游地区的生态环境问题。结果表明,截至20世纪末,岷江上游地区的森林覆盖率直线下降,森林的生态功能下降,水土流失加剧,侵蚀强度增强,养分流失严重,土地质量下降,干旱河谷面积不断扩大,草场退化,自然灾害频繁发生,其强度与破坏性也有所增加。因此,必须采取相应的措施来改善岷江上游地区的生态环境,以保证岷江下游、成都平原及长江中上游的生态安全。
The eco-environmental problems in the upper reaches of Min River were studied based on data analysis.Results indicated that,by the end of 20th century,the forest coverage in this area decreased linearly,the eco-functions of the forest declined,the soil erosion aggravated,the erosion strength intensified,the nutrients lost seriously,the soil quality downgraded,the area of arid valleys kept expanding,the grassland degenerated,the natural disasters occurred frequently and their strength and destructiveness improved,therefore,some effective measures should be adopted to improve the eco-environmental problems in the upper reaches of Min River,so as to guarantee the eco-safety in this area and Chengdu Plain as well as in the middle and upper reaches of Yangtze River.
出处
《安徽农业科学》
CAS
北大核心
2011年第6期3508-3511,共4页
Journal of Anhui Agricultural Sciences
基金
中央高校基本科研业务费专项
长安大学科技创新计划项目(CHD2009JC078)
关键词
岷江上游
环境变化
水土流失
干旱河谷
Upper reaches of Min River
Environmental changes
Soil erosion
Arid valleys
