| 引用本文: | 高雅文,邓可楠,张 月,等.基于农业旱涝指标的湖北省棉花生育期内旱涝急转特征分析[J].灌溉排水学报,2021,(2):101-110. |
| GAO Yawen,DENG Kenan,ZHANG Yue,et al.基于农业旱涝指标的湖北省棉花生育期内旱涝急转特征分析[J].灌溉排水学报,2021,(2):101-110. |
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| 摘要: |
| 【目的】揭示湖北省棉花不同生育期内旱涝急转事件的时空演变规律，为减灾保产提供依据。【方法】基于日尺度标准化前期降水蒸散指数SAPEI（Standardized Antecedent Precipitation Evapotranspiration Index）对农业旱涝急转事件进行日尺度判定，并利用湖北省26个气象站的逐日气象资料对湖北省1961―2019年内棉花不同生育期的旱涝急转事件进行时空规律分析。【结果】SAPEI适用于反映湖北省棉田的水分状况并可用于研究旱涝急转规律。在棉花全生育期内，旱转涝累计强度约为涝转旱累计强度的5倍。花铃期内棉花遭受旱涝急转的次数最多且单次平均强度最大；蕾期旱涝急转次数少但每次强度较大；吐絮期旱涝急转强度低但次数偏多。湖北棉花旱涝急转灾害主要集中在鄂西北和洪湖地区，旱转涝和涝转旱均频发。此外，湖北省内棉田旱涝急转事件在不同年代的差异较大，其中20世纪70年代旱涝急转强度最大，但自20世纪90年代以来，旱涝急转有发生范围变广、强度增加的趋势。【结论】湖北省内棉花旱涝急转灾害以旱转涝形式为主，主要发生在花铃期，具有频率高、强度大的特征，因此有必要重点关注花铃期内棉田发生旱转涝的风险，尤其是鄂西北和洪湖地区等地区。 |
| 关键词: SAPEI；棉花；湖北省；灌溉排水；干旱；涝渍 |
| DOI：10.13522/j.cnki.ggps.2020195 |
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| Using Agro-meteorological Indexes to Analyze Variation in Abrupt Drought-flooding Alternation During Cotton Growth Season in Hubei Province |
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GAO Yawen, DENG Kenan, ZHANG Yue, QIAN Long, CHEN Cheng,LUO Yunying, HUANG Taoxing, CHEN Lijuan
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1. School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan 430072, China; 2. School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China; 3. College of Water Resources Science and Engineering, Yangzhou University, Yangzhou 225009, China; 4. School of Environment, Jinan University, Guangzhou 511443, China; 5. Huadong Engineering Corporation Limited, Power China, Hangzhou 311122, China; 6. Hubei Water Resources Technical College, Wuhan 430000, China
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| Abstract: |
| 【Objective】 Drought and flooding are two abiotic stresses in crops growth. Understanding how they occur in a region is critical to safeguarding its agricultural production. The objective of this paper is to analyze the spatiotemporal variation in abrupt drought and flooding alternation (DFAA) occurring at different growth stages of cotton in Hubei province, aimed to provide reference for ameliorating detrimental impact of these natural hazards on cotton production.【Method】An agro-meteorological index named SAPEI -standardized antecedent precipitation evapotranspiration index - was first derived from the renowned SPEI -standardized precipitation evapotranspiration index. It was then used to assess the daily drought and flooding condition in cotton fields across the province, from which we defined and identified individual DFAA events including both abrupt drought-flooding alternations and abrupt flooding-drought alternation. We also collected daily weather data from 26 weather stations across the province and computed their SAPEI, from which we calculated the spatiotemporal variation in DFAA events from 1961 to 2019 at four cotton growth stages: seedling, budding, flowering and boll-forming, and boll opening stages.【Result】The SAPEI index was able to describe soil moisture in the cotton field and identify the DFAA events in the province. Regarding the types of DFAA, abrupt drought-flooding alternations had occurred approximately five times the abrupt flooding-drought alternations. It was also found that the frequency and intensity of DFAA varied with the growth stages, most frequent and intensive during flowering and boll-forming stage and least frequent at the budding stage although the intensity during this stage remained relatively high. In contrast, the occurrence of DFAA during the boll-opening stage was least intensive but more frequent. Spatially, the northwest of the province and the Honghu basin were most prone to both abrupt drought-flooding alternation and flooding-drought alternation. Temporally, there were more DFAA events in the 1970s; since the 1990s, DFAA has tended to become more widespread and intensive.【Conclusion】Abrupt drought-flooding alternation is the major DFAA form during the growth season of cotton in Hubei province, especially at the flowering and boll-forming stage and in the northwest of the province. |
| Key words: SAPEI; cotton; Hubei Province; irrigation and drainage; drought; waterlogging |
