杭州單體鋼架大棚風災時空特征
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杭州市科技項目(2019203B69)資助


Temporal and Spatial Characteristics of Wind Disasters for Single Steel-Frame Greenhouses in Hangzhou
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    摘要:

    基于杭州國家基準氣候站1951—2018年大風逐日資料和經過質控后的373個自動氣象站2014—2018年小時極大風速資料,采用MK方法和平均值法,分析杭州建站以來的大風年際變化規律和近5年不同風力等級風的空間分布特征,結合單體鋼架大棚風災等級指標和設施大棚第3次農業普查的鄉鎮級數據,提出農業發展建議。研究結果表明:造成單體鋼架大棚重度受損的大風天數年際變化為波動中下降,2001年出現突變,下降趨勢顯著,各季變化類似;造成單體鋼架大棚輕、中、重3個等級的各級風發生天數和時次數的多發地均為臨安西北部山區、富陽安頂山和杭州灣等區域,其中杭州灣區域也是杭州設施農業主要發展地,需進行重點防御,適當提高建設標準;杭州中心區域為大風低值區,可進一步發展設施農業。一年四季中,造成單體鋼架大棚中到重度風災的風出現天數和時次數均為夏季最高、春季其次、秋季最少,持續時間以冬季最長、秋季次之、春季最短。

    Abstract:

    Based on the gale data of Hangzhou National Base Station from 1951 to 2018 and the maximum wind speed data of 373 automatic meteorological stations after the quality control from 2014 to 2018, to provide suggestions on agricultural development, the MK method and GIS mapping technology are used to analyze the interannual variation of strong winds since the establishment of Hangzhou Station and the spatial distribution characteristics of different wind levels in recent five years, combined with the wind disaster grade index of single steelframe greenhouses and the townlevel data of the third agricultural census. The results show that the number of strongwind days in the year of severe disasters in the greenhouses decreases fluctuationally, and a sudden change happened in 2001, with a more obvious downward trend, and the changes in various seasons are similar. As a result, the areas where the greenhouses suffered from the light, medium and heavy wind disasters are in the northwestern Linan, Anding Mountain of Fuyang and the Hangzhou Bay in the northeastern Zhejiang Province. The Hangzhou Bay area is also the main development area of facility agriculture, which requires higher construction standards. The central area of Hangzhou is the low value area of high wind, which is conducive to the further development of facility agriculture. The number of days and times of serve wind disasters causing moderate to severe wind disasters in singlesteel frame greenhouses are the highest in summer, followed by spring, and the least in autumn, with the longest duration in winter, followed by autumn and the shortest in spring.

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朱蘭娟,楊軍,范遼生,王俊驕,楊欣潔.杭州單體鋼架大棚風災時空特征[J].氣象科技,2021,49(1):131~138

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  • 收稿日期:2020-01-07
  • 定稿日期:2020-07-08
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  • 在線發布日期: 2021-03-04
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