長(zhǎng)江流域汛期候尺度降水量時(shí)空集中特征和洪澇關(guān)系

doi:10.12306/2023jms.0032

首頁(yè) > 過(guò)刊瀏覽>2024年第44卷第5期 >825-832. DOI:10.12306/2023jms.0032

長(zhǎng)江流域汛期候尺度降水量時(shí)空集中特征和洪澇關(guān)系
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                        10.12306/2023jms.0032
                    
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中圖分類號(hào):P426.616
基金項(xiàng)目:國(guó)家重點(diǎn)研發(fā)計(jì)劃資助項(xiàng)目(2022YFC3004202);江蘇省自然災(zāi)害綜合風(fēng)險(xiǎn)普查評(píng)估與區(qū)劃省級(jí)質(zhì)檢審核項(xiàng)目(SZZC-JC-2022081)

Spatial and temporal concentration characteristics of pentad-precipitation and its relationship to flood-producing into the Yangtze River Basin

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摘要:

本研究使用1961—2020年長(zhǎng)江流域161個(gè)氣象站點(diǎn)汛期時(shí)降水量數(shù)據(jù),利用Mann-Kendall趨勢(shì)分析等方法,分析長(zhǎng)江流域汛期降水量集中度、集中期,揭示長(zhǎng)江流域降水的時(shí)空變化趨勢(shì)和規(guī)律。通過(guò)分析洪水年汛期間的降水量時(shí)空分布特征,探索降水量集中分布特征和規(guī)律與長(zhǎng)江流域洪澇發(fā)生的關(guān)系。結(jié)果表明,長(zhǎng)江流域汛期各站平均降水量集中度保持在0.65~0.80,整體呈現(xiàn)由東向西遞增的趨勢(shì),長(zhǎng)江流域多年平均最大降水量集中期主要表現(xiàn)為以鄱陽(yáng)湖和洞庭湖流域以及四川盆地為中心向四周滯后。在長(zhǎng)江流域的典型洪水年,除了汛期間降水量較高之外,降水量集中度、降水量集中期均有比正常年份更集中、更異常的特點(diǎn)。

Abstract:

In this study, 161 meteorological stations data in the Yangtze River Basin from 1961 to 2020 was used to analyze the Precipitation Concentration Degree(PCD) and Precipitation Concentration Period(PCP) in the Yangtze River Basin during the flood season, and the Mann-Kendall trend analysis and other methods were also used to reveal the spatial and temporal trends and patterns of precipitation in the Yangtze River Basin. The relationship between the concentrated distribution characteristics and patterns of precipitation and the occurrence of floods in the Yangtze River Basin was explored by analyzing the spatial and temporal distribution characteristics of precipitation in flood years. Results indicate that the average PCD at each station in the Yangtze River Basin during the flood years remained between 0.65-0.80, with a noticeable increase in concentration from east to west. The maximum multi-year average of PCP in the Yangtze River Basin showed a lag with Poyang Lake and Dongting Lake Basins and the Sichuan Basin as the centers. In a typical flood year in the Yangtze River Basin, the PCD and PCP have a more pronounced and abnormal distribution compared to normal years, in addition to higher precipitation during the flood season. These findings provide a scientific basis for understanding the relationship between precipitation and the occurrence of floods in the Yangtze River Basin.

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白淑英,張正,顧海敏,謝濤.長(zhǎng)江流域汛期候尺度降水量時(shí)空集中特征和洪澇關(guān)系.氣象科學(xué),2024,44(5):825-832 BAI Shuying, ZHANG Zheng, GU Haimin, XIE Tao. Spatial and temporal concentration characteristics of pentad-precipitation and its relationship to flood-producing into the Yangtze River Basin. Journal of the Meteorological Sciences,2024,44(5):825-832

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收稿日期:2023-02-18
最后修改日期:2023-05-12
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在線發(fā)布日期: 2024-11-21
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