Drought analysis in the eastern plain of Henan province from 1956 to 2016

doi:10.14088/j.cnki.issn0439-8114.2021.09.011

Abstract

Abstract: The methods of precipitation Z index, wavelet and anomaly analysis were used to analyze the drought in the Eastern plain of Henan province, so as to master its characteristics and laws of drought. The results showed that the annual frequency of drought in this area was 29.5%, the variation of the 1956 to 1967,1978 to 1986 and 1996 to 2004 sequences were obvious. The drought evolution was the most oscillatory in the 10a cycle scale, and was the main cycle. The frequency of the drought was between 24.7% and 34.2%, and the drought-prone areas were mainly concentrated in two zones. The average ratio of drought area was 30.03%, which showed a slow increasing trend. It can be seen that the region should strengthen water resources management developing high-efficiency water-saving and circular agriculture, to ensure food security.

Key words: drought, precipitation Z index, wavelet analysis, Tyson polygon method, eastern plain of Henan province

CLC Number:

P467

YANG Dan, LI Zhong-yuan, WANG Guo-zhong, LIU Shou-dong, LUO Qing-yuan, LI Jia-hong. Drought analysis in the eastern plain of Henan province from 1956 to 2016[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(9): 61-65.

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