摘要本文研究区河南省是中国的第一农业大省，这一地区农业经济十分发达，国内粮 食生产总值长期居于中国前列，也是中国的粮食输出大省。然而随着近些年经济工作 的开展，本地生态环境被毁坏的非常严重，从而导致了生态不平衡。干旱，使得地下 水源变得越来越少；水源越少，越容易造成干旱，形成了恶性循环。所以对该区域进 行干旱动态监测十分必要，有利于政府部门提前做好抗灾措施。地表温度（LST）和 归一化植被指数（NDVI）数据对于干旱情况都有着揭示作用，但是如果单独使用任 意一个都会存在一定的局限性，所以只有二者结合使用才可以通过代表绿色植被对干 旱胁迫环境的反应来揭示土壤水分信息，反应植被是否受到了干旱的影响。本文采用 MODIS 相关数据，构建 LST-NDVI 特征空间，计算河南地区的温度植被干旱指数

（TVDI）。对 2001~2010 年河南地区的干旱情况研究结果表明：（1）总体来看，河南省大 部分地区呈干旱情况，除了个别年份，极少出现极干旱和极湿润的情况。（2）内陆 地区明显比沿海地区干旱指数高。（3）湿润地区几乎没有改变，都集中在河南的西 部和北部部分地区。73969

毕业论文关键词： 干旱， 地表温度， 温度植被干旱指数， 河南省

Henan province is the largest agricultural province in China。 The agricultural economy in this area is very developed。 The GDP of China is in the forefront of China, and it is also a big province of grain output in China。 However, with the development of economic work in recent years, the local ecological environment has been destroyed very seriously, which leads to the imbalance of the ecological environment。 Drought, making the underground water becomes less and less; the less water, the more likely to cause drought, the formation of a vicious circle。 So the dynamic monitoring of drought in the region is necessary, will help government departments do mitigation measures in advance。 Land surface temperature (LST) and normalized difference vegetation index (NDVI) data for drought conditions have a role in revealing, but if used alone any a all have certain limitations, so only two in combination can by green vegetation to drought stress environment response to reveal the information of soil water, vegetation is subject to the effects of drought。 In this paper, the MODIS data are used to construct the LST-NDVI feature space and calculate the Temperature Vegetation Drought Index (TVDI) in Henan area。

The results show that: (1) in general, most of Henan province in Henan province was in drought condition, except for a few years, there was very little extreme drought and extremely humid condition。 (2) inland areas were significantly higher than those in the coastal areas。 (3) there was little change in the humid areas, which were concentrated in the western and northern parts of Henan。

Key words ： Drought, surface temperature, temperature vegetation drought index, Henan Province

目 录

摘 要 I

Abstract II

1 绪 论 1

1。1 概述 1

1。2 国内外研究现状 1

1。3 主要研究内容和技术路线 2

2 研究数据和方法 3

2。1 研究区域概况