摘要
基于生态绿当量原理及方法,设计不同土地覆被类型的生态服务功能评分标准,构建生态绿当量计算模型,通过计算玛纳斯河流域土地利用类型的面积变化,测算典型年份土地利用类型变化的当量分值,并依此构建生态效益评价模型。结果表明:近37 a研究区各土地利用类型生态当量面积净增加150.71 km2,呈小幅波动增量变化趋势。其中,增量最大的是农田、水域,分别增加456.63 km2和181.7 km2,约占2013年当量面积的29.25%和77.32%;减量最大的是天然牧草地、未利用地、荒草地,分别减少129.12 km2、132.98 km2和230.36 km2,约占2013年当量面积的29.48%、11.32%和17.49%,人类土地经营总体上增加了景观的生态效益,但土地垦殖和草地退化处于脆弱的平衡状态。
Based on the principles and methods of ecological green equivalent, firstly, the scores of ecological service functions of different land use/cover types were designed. Secondly, the equivalent values of land use change were estimated. On which an assessment model was framed to assess the eco-efficiency of land use in the Manas River Basin. The results showed that the net enlargement of the Manas River Basin in recent 30 years, and there was an enlarge ecological equivalent area was 150.71 km^2 in ment trend in a slight fluctuation way. The enlarged areas of farmland and waters were the largest, they were 456.63 km^2 and 181.7 km^2 accounted for 29.25% and 77.32% of the equivalent area in 2013, respectively. The reduction of natural grassland, unused land and wasteland was obvious, and their equivalent areas were reduced by 129.12 km^2, 132.98 km^2 and 230.36 km^2 and accounted for 29.48%, 11.32% and 17.49% of the equivalent area in 2013, respectively. The eco-efficiency of landscape was increased by land management, but the land reclamation and grassland degradation resulted in a fragile balance.
出处
《干旱区研究》
CSCD
北大核心
2016年第5期996-1002,共7页
Arid Zone Research
基金
国家自然科学基金项目(41361025和41361073)资助
关键词
绿当量
土地利用
生态效益
玛纳斯河流域
新疆
green equivalent
land use
eco-efficiency
the Manas River Basin
Xinjiang
