| Research on application of Palmer drought model in Jinghuiqu irrigation area |
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| DOI：10.7606/j.issn.1000-7601.2010.03.47 |
| Key Words: drought Palmer drought model drought index Jinghuiqu irrigation area |
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| Abstract: |
| Based on long series of hydrology and meteorology data of Jinghuiqu irrigation district at the dry area of
north bank of the Weihe River, Palmer drought model suitable for the area was developed by undetermined coefficient
method and regression method . Then the drought model was applied for drought characteristic analysis of Jinghuiqu irriga-tion district, and the frequency of different degree of drought and its distribution in a year was given, and some valuable conclusion was drawn. For example, a severe drought could be arise in winter imigation period and spring irigation period, and the drought trend of the irrigation area was also proved . All these results are coincident with actual drought situa-tion of the imigation area for many past years . Therefore, the Palmer drought model developed for the irrigation area was correct, with a definite physical meaning and can reflect the drought characteristics of the area. |
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