GONG Jie,MA Xuecheng,ZHANG Lingling,et al.Spatiotemporal Variation of Habitat Quality in Bailongjiang Watershed in Gansu Based on InVEST Model[J].Research of Soil and Water Conservation,2018,25(03):191-196.
基于InVEST模型的甘肃白龙江流域生境质量时空分异
- Title:
- Spatiotemporal Variation of Habitat Quality in Bailongjiang Watershed in Gansu Based on InVEST Model
- 分类号:
- X171.1;X826
- 摘要:
- 基于1977年、1990年、2002年、2014年的Landsat TM/ETM+遥感数据，运用GIS和InVEST模型，分析了甘肃白龙江流域生境质量时空分异特征，旨在为流域自然生态系统管理和可持续发展提供参考。结果表明：（1） 1977-2014年，林地和草地是该流域的主要土地覆被类型，林地、耕地和建设用地的面积增率为0.4%，0.36%和3.7%，草地、未利用地和水域的减少率约为0.5%。（2） 1977-2014年，生境质量总体表现出先降低后缓慢增加的趋势。（3） 生境质量较高的区域主要分布在流域西北部与文县南部，集聚于自然保护区和林业管护区；生境质量较低的区域主要分布在河谷近岸、农耕区、城乡聚落区、裸地和低覆盖草地等，集聚于舟曲-武都段白龙江近岸区及文县和武都交界区、宕昌西北部等。研究结果可为流域生境保育及生态建设提供参考依据。
- Abstract:
- Based on GIS techniques and InVEST model, the Landsat TM/ETM+ images from 1977, 1990, 2002 and 2014, we analyzed the spatiotemporal variation of habitat quality in the Bailongjiang Watershed (BLJ watershed) in Gansu to provide the scientific support for natural ecosystem management and sustainable development. The results showed that:(1) forestland and grassland were the main land types in the watershed, and the increase rates of forestland, farmland and construction were 0.4%, 0.36% and 3.7%, respectively, and the grassland, unused land and water area reduced about 0.5% from 1977 to 2014; (2) the habitat quality showed a tendency of the decreased first and then increased slowly; (3) the higher habitat quality area mainly distributed in the northwestern BLJ Watershed and the southern part of Wenxian and gathered with area of the nature reserve and forest; the areas with the relatively poor habitat quality mainly distributed in river valleys, farmland area, urban and rural settlement, the bare land and grassland with low vegetation coverage, and gathered in the bank area of Baishuijiang between Zhouqu-Wudu, the adjacent area between Wenxian and Wudu, and the northwestern Tanchang. This study results can provide scientific support for watershed habitat conservation and ecological construction in the mountainous areas in west China.
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备注/Memo
收稿日期:2017-06-28;改回日期:2017-07-24。
基金项目:国家自然科学基金“甘肃白龙江流域景观格局与生态系统服务功能时空变化研究”（4127199）
作者简介:巩杰(1975-),男,甘肃宁县人,博士,硕士生导师,主要从事景观生态学、土地变化科学、生态系统服务、环境遥感与生态评价及规划研究。E-mail:jgong@lzu.edu.cn