水土保持研究2017，Vol.24Issue(5)：375-381,7.
土地利用数据在TVDI干旱监测方法中的应用研究——以甘肃省河东地区为例
Research of Application of Land Use Data to TVDI Method on Drought Monitoring in the Eastern Region of Gansu
摘要
Abstract
Clear principle and concise physical meanings make Temperature Vegetation Dryness Index (TVDI)be a wildly used method to monitor drought.The Normalized Difference Vegetation Index (NDVI) and Land Surface Temperature (LST) would not the same on different land use types,and the difference would affect the drought monitoring by using TVDI method.Taking the eastern region of Gansu as an example,TVDI was calculated based on history MODIS data,and improvement of TVDI for different land use types was discussed.The results are as follows.(1) On the whole,TVDI had the indication to the relative soil moisture (RSM) in Qingyang,Pingliang,Linxia,the north of Dingxi and Gannan.However,TVDI could not indicate the RSM well in the south of Dingxi,the southern region of Gansu and Tianshui.(2) Feature space was built on different land types,which was more precise and reasonable for indicating the RSM.On the one hand,the monitor ability of TVDI for RSM status was improved in the east of Gansu and some parts of Gannan because of TVDI decreasing for farmland type and increasing for woodland and meadow land type.On the other hand,the distribution of TVDI,which did not consider the land types,was more centralized than RSM.By contrast,the distribution can be broadened by taking land type into account feature space,and it is helpful for distinguish RSM of different drought grades.关键词
TVDI/长序列MODIS/土地利用类型/干旱监测/甘肃省Key words
TVDI/history MODIS data/land using type/drought monitoring/Gansu Province分类
信息技术与安全科学引用本文复制引用
沙莎,王莺,王丽娟,蝴蝶..土地利用数据在TVDI干旱监测方法中的应用研究——以甘肃省河东地区为例[J].水土保持研究,2017,24(5):375-381,7.基金项目
甘肃省气象局科研项目(2015-13) （2015-13）
公益性行业(气象)科研专项(重大专项)(GYHY201506001-5) （气象）
公益性行业(气象)科研专项项目(GYHY201006023) （气象）
科技部农业科技成果转化资金项目(2011GB24160005) （2011GB24160005）
中国气象局兰州干旱气象研究所2013年基本科研业务费(KYYWF201318) （KYYWF201318）
