JOURNAL OF NATURAL RESOURCES ›› 2013, Vol. 28 ›› Issue (4): 646-655.doi: 10.11849/zrzyxb.2013.04.011

• Resources Evaluation • Previous Articles     Next Articles

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

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)

CLC Number: 

  • TP79