摘要: |
开展降水强度情势变化研究对提高防洪减灾和水资源管理水平具有重要意义。基于柔远川1980-2017年9个雨量站与合水川1981-2017年10个雨量站的日降水量和小时降水量实测资料,采用MK趋势检验法,分析了最大1hr、1d降水强度()及分级降雨降水强度情势变化特征。结果表明,空间上,与空间分布差异较大,的空间变差系数大于,合水川、空间变差系数大于柔远川;时间上,柔远川与合水川的空间变差系数分别呈显著增大与减小趋势(),增大与减小幅度分别为0.018/10a与0.039/10a,柔远川极值呈显著性增大趋势,增大幅度7.68mm/(d.10a);柔远川分级降雨降水强度变化不显著,合水川中雨与大雨的降水强度呈显著增加趋势,增加幅度分别为0.61、1.29mm/(d.10a)。 |
关键词: 降水强度 降水分级 最大日降水强度,最大小时降水强度 柔远川 合水川 泾河 |
DOI: |
分类号:TV125 |
基金项目:国家重点研发计划(2017YFC0404402),中央级科研院所基本科研业务费专项(HKY-JBYW-2018-09、HKY-JBYW-2016-31) |
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Change Characteristics of Precipitation Intensity in Rouyuanchuan and Heshuichuan Watersheds of Jing River |
Zhang cuiping1, lixiaoping1, chenzhen1, mengyawen2
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1.Yellow River Institute of Hydraulic Research;2.Xifeng Bureau of Hydrology and Water Resources Survey
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Abstract: |
Understanding the change in precipitation intensity plays an important role in flood risk mitigation and water resource management. Based on the field data of daily and hourly precipitation from 9 rain gauge stations in Rouyuanchuan from 1980 to 2017 and 10 rain gauge stations in Heshuichuan from 1981 to 2017, the annual maximum precipitation intensity of 1hr (Ihr) and 1d (Id) and graded precipitation intensity change characteristics are analyzed by the MK trend test method, and linear regression. For spatially variation, the distribution is uniform for Ihr and Id, and the coefficient variation (CV) of Ihr is greater than CV of Id, CV of Ihr and Id in Heshuichuan is greater than that in Rouyuanchuan. The temporal variation, CV of Id in Rouyuanchuan has a significant increasing trend (α=0.05) with a rate 0.018/10a, and it in Heshuichuan has a significant decreasing trend with a rate of 0.039/10a, the extreme values Id in Rouyuanchuan has a significant increase trend with a ratio of 7.68 mm/(d.10a), precipitation intensity of moderate rain and heavy rain in Heshuichuan shows a significant increase trend with the ratio of 0.61, 1.29 mm/(d.10a), respectively. |
Key words: precipitation intensity, precipitation grade, annual maximum daily precipitation intensity, annual maximum hourly precipitation intensity, Rouyuanchuan, Heshuichuan, Jing Rive |