摘要
以陕北黄土高原为研究区,基于In VEST水源涵养功能评价模块,定量评价退耕还林还草工程背景下土地利用/覆被变化对研究区水源涵养的影响,在此基础上开展水源涵养空间分区。结果表明：1 2000-2010年,陕北黄土高原草地、灌丛和林地的面积分别增加了3204 km2、285.3 km2和122.7 km2,城镇面积增加了450.4 km2;农田、荒漠、湿地的面积分别面积减少了3984.5 km2、72.7 km2和5.2 km2。2 2000-2010年,陕北黄土高原水源涵养量整体以减少为主,中部减少最为显著,减少量在25 m3/hm2~40 m3/hm2,局部区域在40 m3/hm2以上;其他大部分区域均有0~25 m3/hm2不等的减少。3陕北黄土高原水源涵养功能高度重要区和极重要区的总面积为32255.1 km2,所占比例为40.5%。4通过陕北黄土高原水源涵养功能评价和重要性分区为生态系统的科学管理提供参考。
The research on the assessment of ecosystem services is the hot spot and focus in global researches of ecology, geography, and exerted a profound influence on significantly regional ecosystem management, sustainable development and human welfare. We chose the InVEST model, a tradeoff model of regional development and ecosystem management, which provides a quantitative, scientific, dynamic assessment methods for regional water retention. Under the background of the project of Returning Farmland to Forestland, the influence of the land cover changes on the water retention was calculated quantitatively. The main conclusions are as follows：（1） The area of grass, scrub, woodland and towns increased by 3204 km2, 285.3 km2,122.7 km2 and 450.4 km2, respectively in the Loess Plateau of northern Shaanxi from 2000 to2010. By contrast, farmland, deserts and wetlands were reduced by 3984.5 km2, 72.7 km2and5.2 km2, respectively.（2） Water retention of the research area displayed a decreasing tendency in the 10 years, which has a remarkable reduction of 25 m3/hm2- 40 m3/hm2 in the central part of the study area invloving the southwest of Wuding River basin, the upper reaches of Yanhe River and Qingjian River. Part of the central region has a more significant reduction exceeding 40 m3/hm2. And the reduction of other basins in this area was below 25 m3/hm2.（3）On the basis of these studies, the importance level of water conservation capacity in 2010 of the study area has been classified, and the total area of the water retention in highly important area and vital important area reached 32255.1 km2 with a proportion of 40.5%.（4） The assessment of water conservation function and the five partitions of importance level not only provides a reference for the effective management of ecosystems and is of great help to developing planning decisions in a scientific and rational perspective.
出处
《地理研究》
CSSCI
CSCD
北大核心
2016年第4期664-676,共13页
Geographical Research
基金
全国生态十年变化遥感调查与评估项目(STSN-05-27)
关键词
水源涵养
土地覆被变化
InVEST模型
黄土高原
water retention function
land cover changes
InVEST model
Loess Plateau of Shaanxi
