ZHANG Yinan, ZHOU Liangguang. A Comparative Analysis of Agricultural Drought Zoning in Huaihe River Basin[J]. Soils and Crops, 2017, 6(3): 223-233. DOI: 10.11689/j.issn.2095-2961.2017.03.009
Citation: ZHANG Yinan, ZHOU Liangguang. A Comparative Analysis of Agricultural Drought Zoning in Huaihe River Basin[J]. Soils and Crops, 2017, 6(3): 223-233. DOI: 10.11689/j.issn.2095-2961.2017.03.009

A Comparative Analysis of Agricultural Drought Zoning in Huaihe River Basin

  • Huaihe River Basin is located in a climatic transition zone of North-South border line of China, with different rainfall distribution and frequent drought. Using the daily precipitation data between 1951 and 2008 from 20 meteorological stations, we conducted, with weighted average of precipitation (WAP) index, spatial Kriging and regression analysis methods, a comparative study of agricultural drought zoning in Huaihe River basin. The results showed as follows. Temporally, the WAP index fluctuated significantly as a whole, with the highest index and variance in light-drought plain and lowest index and variance in middle-drought plain. Spatially, WAP index decreased from the southeast to the northwest and from inland to coast, and there were two highest value points:the southeastern point was in the light-drought plain of Jiangsu Province such as Huaian with 2.49 of WAP index, meaning the minimum drought degree of the region; the southwestern point was in the heavy-drought hilly area of western Henan Province such as Xinyang and Liuan with 2.58 of WAP index. However, the WAP index was mainly applied to plain area, while the result of drought degree was poorly demonstrated in mountain area. Therefore, in the plain area, WAP index increased in an order of low-hilly plain with heavy-drought, low-hilly plain with light-drought, plain with middle-drought and plain with light-drought, while the drought degree was in a decreasing order. This analysis provides a reference for other areas to drought prevention.
  • loading

Catalog

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return