SCIENTIA GEOGRAPHICA SINICA ›› 2018, Vol. 38 ›› Issue (5): 808-817.doi: 10.13249/j.cnki.sgs.2018.05.019

• Orginal Article • Previous Articles     Next Articles

Spatial and Temporal Variation Characteristics of Drought During Rice Growth Based on SPI in Southwest China from 1960 to 2012

Fanglin Yu1(), Shiyan Zhai1,2(), Zheng Wang3, Genxin Song2, Yating Li1, Nan He2   

  1. 1. Key Research Institute of Yellow River Civilization and Sustainable Development & Collaborative Innovation Center on Yellow River Civilization of Henan Province, Henan University, Kaifeng 475001, Henan, China;
    2. Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions/College of Environment and Planning, Henan University, Kaifeng 475004, Henan, China
    3. Institutes of Science and Development, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2017-05-12 Revised:2017-08-24 Online:2018-05-10 Published:2018-05-10
  • Supported by:
    China Postdoctoral Sciece Foundation(2015M570626), Open Research Fund of Key Laboratory of Geographic Information Science, Ministry of Education (KLGIS2014A03), National Natural Science Fundation of China (41671536,41601120), Henan University Scientific and Technological Innovation Team Support Program (16IRTSTHN012)

Abstract:

Based on monthly precipitation data from 1960 to 2012, Standard Precipitation Index with 1 month time scale (SPI1) is calculated. We investigate the spatial and temporal variation characteristics of agriculture drought based SPI1 index and four growth stages of rice in the Southwest China. Results show that: 1) Overall, the drought station ratio for each year from 1960 to 2012 in the southwest is high and above 50%, presenting whole drought characteristic. 2) The temporal and spatial characteristics of agriculture drought during rice growth stage are different. ① From 1960 to 2012, GPR1 and GPR2 phases are dominated by whole drought. GPR3 and GPR4 phases show the distribution of the localized drought > regional drought >whole drought. ② The continuity drought characteristics during each growth stage of rice are evident. Especially in GPR2, it appears the whole drought and regional drought with the period of 2-6 years. ③ The area with high drought occurrence frequency for three type of drought has shown spatial shift characteristic during different growth stage. The area with high occurring probability of mild drought has transfer from northeast to southwest trend. The region with high occurring probability of moderate drought transferred from the north to the south. The region with high occurring probability of severe drought the spatial distribution of each stage is quite different. ④ In the GPR1 and GPR2 phases, rice is mainly affected by mild drought and moderate drought. In GPR3 and GPR4, severe drought occurrence frequency increases.

Key words: southwest, standardized precipitation index, drought, rice growth stage

CLC Number: 

  • K903