摘要
目的揭示宝鸡市2000-2014年间植被覆盖特征及其动态变化情况。方法以宝鸡市2000年、2005年、2010年和2014年4个时相遥感影像为基础,依据归一化植被指数(NDVI)和像元二分模型法进行估算。结果 (1)从空间分布上看,宝鸡市2000-2014年间整体植被覆盖良好,总体上以中、中高和高植被覆盖度为主。(2)从时间动态变化上看,2000-2005年间宝鸡市植被覆盖变化不大,2005-2010年间出现了明显的改善,而2010-2014年间退化明显。(3)各行政区域植被覆盖度变化趋势具有明显的差异性。结论宝鸡市整体植被覆盖度高,2000-2014年间表现出先增加后减少的变化趋势,部分区域出现了明显的退化现象。
Purposes--To reveal the characteristics and dynamic changes of the vegetation coverage in Baoji City, Shaanxi, China during the period from 2000 to 2014. Methods--Based on the remote sense images of Baoji City in 2000, 2005, 2010 and 2014, the changes of the vegetation coverage was estimated using the normalized differential vegetation index （NDVI） and dimidiate pixel model. Results--（1） From the point of view of spatial distribution, the vegetation coverage in Baoji City is good on the whole, the areas are dominated by medium, medium--high and high vegetation. （2） From dynamic time change, the vegetation coverage in the investigated areas changed little during the period from 2000 to 2005, and there was an obvious improvement during the period from 2005 to 2010, while significant degradation during the period from 2010 to 2014. （3） The change trend of the vegetation coverage in administrative regions has obvious differences. Conclusions--The vegetation coverage in Baoji City is high which has the trend of increasing first and then decreasing, but there is an obvious degradation phenomenon in some areas.
作者
翟雅倩
周旗
张翀
李改萍
ZHAI Ya-qian ZHOU Qi ZHANG Chong LI Gai-ping(Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation, Baoji University of Arts and Sciences, Baoji 721013, Shaanxi, China)
出处
《宝鸡文理学院学报（自然科学版）》
CAS
2016年第4期31-36,共6页
Journal of Baoji University of Arts and Sciences(Natural Science Edition)
基金
陕西省重点实验室计划项目(15JS009)
