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相恺政, 赵安周, 胡小枫, 张向蕊.1980-2019年海河流域气象干旱和农业干旱变化及传播特征水资源与水工程学报[J].,2022,33(2):194-202
1980-2019年海河流域气象干旱和农业干旱变化及传播特征
Variation and propagation characteristics of the meteorological and agricultural drought in the Haihe River Basin from 1980 to 2019
  
DOI:10.11705/j.issn.1672-643X.2022.02.26
中文关键词:  气象干旱  农业干旱  时空演变  干旱传播; SPEI; SSMI; 干旱特征; 海河流域
英文关键词:meteorological drought  agricultural drought  spatio-temporal evolution  drought propogation  standardized precipitation evapotranspiration index (SPEI)  standardized soil moisture index(SSMI)  drought characteristics  the Haihe River Basin
基金项目:国家自然科学基金项目(42171212、42071246);河北省自然科学基金项目(E2020402006);河北省高等学校青年拔尖人才计划项目(BJ2018043); 2022年河北省硕士研究生创新项目(CXZZSS2022030)
作者单位
相恺政1, 赵安周1,2, 胡小枫1, 张向蕊1 (1.河北工程大学 矿业与测绘工程学院 河北 邯郸 056038 2.邯郸市自然资源空间信息重点实验室 河北 邯郸 056038) 
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中文摘要:
      研究干旱演变和传播特征可为流域防灾抗灾提供帮助和建议。以海河流域为例,采用标准化降水蒸散发指数(SPEI)和标准化土壤湿度指数(SSMI)分别表征气象干旱和农业干旱,并结合趋势分析和频率分析等方法,对1980-2019年该流域气象干旱和农业干旱时空演变规律以及传播特征进行研究。结果表明:在干旱发生频率上,气象干旱和农业干旱的高发区分别集中在流域东北部和中部,不同季节空间分布存在显著性差异,春季和夏季为气象干旱频发季,冬季和春季为农业干旱频发季;从变化趋势上看,SPEI值呈减小趋势的区域主要集中在流域的中东部,其中春季减小趋势最为显著,而SSMI值呈“北增南减”的分布格局,其中秋季减小趋势最为显著;农业干旱对气象干旱的响应具有延时性,不同季节差异显著,夏季传播时间仅为5个月,秋季、冬季和春季的传播时间分别为6、9和11个月;在空间分布上,春季和夏季的相关系数较低,低值区主要分布在流域北部地区,秋季和冬季的相关系数较高,高值区集中分布在流域中部地区。
英文摘要:
      The evolution and propagation characteristics of droughts are studied to provide help and advice for disaster mitigation and drought prevention in river basins. Standardized precipitation evapotranspiration index (SPEI) and standardized soil moisture index (SSMI) were adopted to characterize the meteorological drought and agricultural drought in the Haihe River Basin respectively. The trend and frequency analysis were also combined to study the spatio-temporal evolution and propagation characteristics of the droughts in this basin from 1980 to 2019. The results show that in terms of the frequency of droughts, the high-prone areas of the meteorological drought and agricultural drought were concentrated in the northeast and middle of the basin respectively. Meanwhile, the spatial distribution of different seasons was also significantly differentiated. Among them, spring and summer were the seasons with frequent meteorological droughts, whereas winter and spring were the seasons with frequent agricultural droughts. From the perspective of changing trends, the SPEI declined in the middle and eastern parts of the basin, which showed the most significant decrease in spring; however, the SSMI showed a pattern of “increasing in the north but decreasing in the south” with the most significant decline in autumn. There was a phenomenon of hysteresis in the response of the agricultural drought to meteorological drought, which varied from season to season. The propagation only took 5 months in summer, but 6 months, 9 months and 11 months in autumn, winter and spring, respectively. In terms of spatial distribution, the correlation coefficient in spring and summer was lower compared with other reasons, which mainly distributed in the north of the basin, but higher in autumn and winter, which mainly concentrated in the middle of the basin.
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