摘要
利用水文分析模块和像元二分模型,对涑水河流域的植被覆盖度进行了分析,得到了各地貌类型的植被覆盖度变化情况。结果表明,2002年退耕还林工程实施以来,整个流域的植被覆盖状况明显提高;平原、丘陵、低山区植被覆盖度较高,且变化趋势较好;洼地和高山区植被覆盖状况较稳定,洼地在中低水平以下,高山区在较高水平,中山区植被覆盖度波动较大,受气候等因素影响较大。
We used the hydrological analysis module and the dimidiate pixel model to analyze the vegetation fraction changes of different landforms in Su River basin in this paper.The results show that the vegetation fraction of the entire basin has obviously increased since 2002 when the conversion of cropland to forest project was conducted.The vegetation fractions in plain,hill and low mountain are higher compared to that in the other landforms.The vegetation fractions in lowland and high mountain are relatively low and high respectively,but both are stable,and the vegetation fraction in middle mountain is fluctuated these years because of climate change.
出处
《地理空间信息》
2018年第7期104-107,116,125,共5页
Geospatial Information
基金
国家自然科学基金资助项目(41271361)
中国博士后科学基金资助项目(2016M600356)
关键词
植被覆盖度
涑水河流域
水文分析
像元二分模型
vegetation fraction
Su River basin
hydrological analysis
dimidiate pixel model
