自然资源学报 ›› 2013, Vol. 28 ›› Issue (4): 646-655.doi: 10.11849/zrzyxb.2013.04.011

• 资源评价 • 上一篇    下一篇

基于气象和遥感数据的河南省干旱特征分析

唐侥1,2,3, 孙睿1,2,3   

  1. 1. 遥感科学国家重点实验室(北京师范大学/中国科学院 遥感应用研究所), 北京 100875;
    2. 北京师范大学 地理学与遥感科学学院, 北京 100875;
    3. 环境遥感与数字城市北京市重点实验室, 北京 100875
  • 收稿日期:2011-10-10 修回日期:2012-08-22 出版日期:2013-04-20 发布日期:2013-04-20
  • 通讯作者: 孙睿(1970-),男,甘肃通渭人,教授,博士生导师,主要从事全球变化与遥感应用研究。E-mail:sunrui@bnu.edu.cn E-mail:sunrui@bnu.edu.cn
  • 作者简介:唐侥(1987-),男,重庆涪陵人,硕士,主要研究遥感与GIS应用。E-mail:tangyaogis@mail.bnu.edu.cn
  • 基金资助:

    国家自然科学基金资助项目(40971221);公益性行业(气象)科研专项经费项目(200906022);欧盟FP7-ENV-2007-1(212921)。

Drought Characteristics in Henan Province with Meteorological and Remote Sensing Data

TANG Yao1,2,3, SUN Rui1,2,3   

  1. 1. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by Beijing Normal University and the Institute of Remote Sensing Applications, CAS, Beijing 100875, China;
    2. School of Geography and Remote Sensing Sciences, Beijing Normal University, Beijing 100875, China;
    3. Beijing Key Lab for Remote Sensing of Environment and Digital Cities, Beijing 100875, China
  • Received:2011-10-10 Revised:2012-08-22 Online:2013-04-20 Published:2013-04-20

摘要:

干旱是一种常见的自然灾害,严重影响着我国的农业生产。论文分别采用标准化降水指数(SPI)和条件植被指数(VCI)对河南省干旱时空特征进行分析,并探讨了气象干旱和农业干旱的相关性。结果表明:近60 a河南省气象干旱频率呈现出轻微上升的趋势,夏秋两季气象干旱频率较高,农业干旱频率在秋冬两季较高,气象干旱和农业干旱频率在不同季节呈现出不同的空间分布特点。整体上看,农业干旱相对于气象干旱,存在一定程度的滞后:冬季最长,约为2个月,春季较长,约为1个月,而夏季最短,小于1个月;河南省SPI和VCI的相关性具有明显的时空分布特征:冬季和春季相关性较强,夏季次之,秋季最差;平原和盆地区等冬小麦/夏玉米种植区正相关性较强,在非耕地区有所减弱,而在信阳南部等水稻种植区正相关性差。

关键词: 干旱, 河南省, 标准化降水指数(SPI), 条件植被指数(VCI)

Abstract:

Drought is a major natural disaster that heavily affects the crop yield in China. In this paper, the temporal and spatial variation characteristics of drought in Henan Province, China, are analyzed by using standardized precipitation index (SPI) and remotely sensed vegetation condition index (VCI) respectively. In addition, by correlative analysis, we analyzed the relationship between meteorological drought and agricultural drought in Henan Province. The results show that the meteorological drought frequency appeared a slight rising trend in Henan Province during the last 60 years. The meteorological drought frequency was higher in summer and autumn, while the agricultural drought frequency was higher in autumn and winter in Henan Province. The spatial pattern of drought frequency varied from one season to another. On the whole, agricultural drought lags behind meteorological drought, with a lag of about two months in winter, almost one month in spring and less than one month in summer. Additionally, there is a strong correlation between SPI and VCI in winter and spring, while the correlation becomes worse in summer and the worst in autumn. Considering from the spatial characteristic, the positive correlation between SPI and VCI of winter wheat/summer maize planting region is better than that of the non-cultivated land, while the positive correlation is the worst for rice planting area in the south of Xinyang City.

Key words: drought, Henan Province, standardized precipitation index (SPI), vegetation condition index (VCI)

中图分类号: 

  • TP79