[1]薛天翼,白建军.基于TVDI和气象数据的陕西省春季旱情时空分析[J].水土保持研究,2017,24(04):240-246.
　XUE Tianyi,BAI Jianjun.Spatiotemporal Variations of Spring Drought Based on TVDI and Meteorological Index in Shaanxi Province[J].Research of Soil and Water Conservation,2017,24(04):240-246.
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基于TVDI和气象数据的陕西省春季旱情时空分析

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 24 期数: 2017年04期 页码: 240-246 栏目: 出版日期: 2017-08-28
Title:
Spatiotemporal Variations of Spring Drought Based on TVDI and Meteorological Index in Shaanxi Province
作者:
薛天翼1,2, 白建军1
1. 陕西师范大学 旅游与环境学院, 西安 710119;
2. 北京大学 城市与环境学院, 北京 100871
Author(s):
XUE Tianyi1,2, BAI Jianjun1
1. College of Tourism and Environmental, Shaanxi Normal University, Xi’an 710119, China;
2. College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
关键词:
遥感; 陕西省干旱; TVDI; 气象数据; 时空变化
Keywords:
remote sensing; drought in Shaanxi; TVDI; meteorological data; the spatiotemporal variation
分类号:
TP79
摘要:
陕西省居于中国腹地，受干旱影响严重，开展遥感旱情监测工作，认识旱情的时空特征具有重要的现实意义。利用MODIS产品MOD11A2和MOD13A2构建NDVI-Ts特征空间，获取陕西地区温度植被干旱指数（Temperature Vegetation Dryness Index，TVDI），在利用土壤湿度和气象指数验证了TVDI反映旱情有效性的基础上，以TVDI为干旱指标分析了2000—2015年陕西省春季（2—5月）旱情的时空变化特征。结果表明：（1）土壤相对湿度和降水量与TVDI均呈负相关，TVDI对降水量存在一定的滞后性；（2）近16年来，陕西省年年有旱，但春季旱情总体呈逐年减轻的趋势，年内2—5月旱情会逐渐加重；（3）空间上，近16年来陕西省春旱较为严重的地区主要分布在陕北北部以及关中东北部，而陕北南部、关中西南部及陕南地区旱情较轻。
Abstract:
Shaanxi is located in the hinterland of China where is vulnerable to the impacts of drought, it is significant to analyze the spatiotemporal variations of drought of Shaanxi Province. Based on temperature vegetation drought index (TVDI) obtained from the moderate resolution imaging spectroradiometer (MODIS) products (MOD11A2 and MOD13A2), we established the NDVI-Ts characteristic space. Based on TVDI that can reflect the degree of drought with the use of soil moisture data and meteorological indexes, we analyzed the spatiotemporal variation of spring drought in Shaanxi Province by using TVDI data. The results showed that: (1) there was the negative correlation between TVDI and soil moisture, and the negative correlation between TVDI and precipitation, and there was the time lag between the TVDI and precipitation; (2) in the past 16 years in Shaanxi Province, the tendency of drought severity descended, within a year, the tendency increased from February to May; (3) the arid region distributed in northern part of north Shaanxi and the northeastern part of Guanzhong Plain in the past 16 years, the drought of south Shaanxi area, the south of north Shaanxi and the southwestern part of Guanzhong Plain was relatively slight.

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备注/Memo

收稿日期:2016-07-14;改回日期:2016-08-01。
基金项目:陕西省自然科学基金项目“土壤质地，作物类型及其物候期对遥感干旱监测指数的影响研究：以陕西省为例”（2016JM4016）
通讯作者:白建军(1969-),男,陕西澄城人,教授,主要从事GIS及遥感应用方向的研究。E-mail:bjj@snnu.edu.cn

更新日期/Last Update: 1900-01-01