基于MOD16数据的河南省和山东省干旱的时空分布特征

Spatio-temporal Distribution Characteristics of Drought in Henan and Shandong Provinces Based on MOD16

河南省、山东省位于华北平原,是中国的粮食大省,但因为受自然地理位置等诸多因素的影响,河南省、山东省旱灾频发。采用MOD16A2数据进行作物缺水指数CWSI(Crop Water Stress Index)的计算,对河南省、山东省2012年6月—2013年6月干旱时空分布特征进行分析,主要结论如下:(1)河南省、山东省月际间干旱分布特征差异显著(P<0.05)。CWSI月际最大值出现在2012年6月,为0.9774,且山地干旱程度严重于平原。(2)河南省、山东省季节间干旱分布特征差异显著(P<0.05)。春季干旱情况较为严重,CWSI为0.9189。(3)从CWSI峰值月际、季节变化来看,河南省干旱情况略比山东省严重。河南省、山东省CWSI月际最大值分别为0.9774、0.9662,季节最大值分别为0.9189,0.8869。

Henan Province and Shandong Province are located in the North China Plain,which are major grain provinces in China.However,drought disasters occur frequently within the region.MOD16A2 data is used to calculate the crop water deficit index(CWSI),and the spatial and temporal distribution characteristics of their droughts are analyzed from June 2012 to June 2013.Conclusions are as follows:(1)Differences are significant in inter-monthly drought distribution characteristics between the two provinces.The inter-month maximum of CWSI appeared in June 2012 at 0.9774,and the drought in the mountains is more serious than the plains.(2)Differences are also significant in drought distribution characteristics between the two provinces.The drought in spring is more serious,with a CWSI of 0.9189.(3)Judging from the monthly and seasonal changes of CWSI peak,the drought in Henan is slightly more severe than that in Shandong.The inter-month maximum values of CWSI in Henan Province and Shandong Province are 0.9774 and 0.9662,and the seasonal maximum values are 0.9189 and 0.8869,respectively.