Research on wind disaster risk assessment for facility agriculture in Shandong Province
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摘要: 本研究利用气象观测、高分卫星遥感、灾情直报等数据, 基于自然灾害风险评估理论, 探索了设施农业风灾风险评估方法; 以山东省为例, 从设施农业风灾危险性、暴露度和脆弱性以及防灾减灾能力4个方面, 选择因子构建设施农业风灾风险评估指数, 并对设施农业风灾风险进行了分析和验证。结果显示, 风灾危险性受地形影响, 高值区主要分布在鲁中山区和山东半岛; 暴露度与设施种植建设规范基本一致, 高值区主要分布在鲁中的东部、鲁西北和鲁西南; 脆弱性与基本风压分布较为吻合, 中高值区主要分布在鲁南和鲁中的东部地区; 防灾减灾能力较弱地区主要分布在气象灾害预警能力相对较弱、经济欠发达的鲁西北、鲁西南和鲁中的西部; 设施农业风灾风险高低由危险性、暴露度、脆弱性和防灾减灾能力共同决定, 高风险区主要分布在鲁西北、鲁西南以及鲁中。经检验, 设施农业风灾风险分布与风灾灾情发生情况空间上具有显著一致性, 基于自然灾害风险理论构建的设施农业风灾害风险评估指数合理、方法可行, 结果可为设施农业风灾风险管理以及防灾减损提供参考。Abstract: Wind disaster is one of the meteorological disasters that have a great impact on China’s facility agriculture production, and it is of great theoretical and practical significance to conduct research on wind disaster risk assessment for effective disaster prevention and mitigation in facility agriculture. This paper explored the wind risk assessment method for facility agriculture based on the natural disaster risk theory and its application in Shandong Province. Using the extreme wind speed observation data of Shandong Province from 1991 to 2020, fuzzy information distribution theory was used to calculate the probability of wind disaster occurrence for each level, and the hazard index of wind disaster was constructed by combining with wind intensity. Based on the GF-6 satellite remote sensing image data in 2020, the exposure index was constructed by extracting the area of agriculture facilities in each district and county. Based on the wind resistance design standard of agricultural facilities, the vulnerability index was constructed by using the maximum wind speed data. Based on the wind damage information and wind speed observation data from 2010 to 2020, the wind damage disaster index was constructed to assess the disaster prevention and mitigation capability. The above four risk assessment elements were integrated to construct a wind damage risk assessment index for facility agriculture. The analysis results showed that the wind hazard was influenced by topography and geomorphology, with the highest hazard in the central mountainous area and Shandong Peninsula. The distribution of facility agriculture was more consistent with the norms of facility planting construction, and the high exposure value were mainly distributed in the eastern part of central Shandong, northwestern Shandong and part of southwestern Shandong. The distribution of vulnerability was more consistent with the basic wind pressure, and the medium-high value areas were mainly distributed in southern Shandong and eastern parts of central Shandong, where plastic greenhouses and medium-sized arches were more concentrated. The areas with weaker disaster prevention and mitigation capacity were mainly distributed in northwestern Shandong, southwestern Shandong and west-central Shandong, where the meteorological disaster warning capacity was relatively weak and the economy was less developed. The risk of wind disaster in facility agriculture was determined by integrating four factors: hazard, exposure, vulnerability, disaster prevention and mitigation capacity. The high-risk areas for wind disaster in facility agriculture were mainly in northwestern Shandong, where exposure was high, southwestern Shandong, where vulnerability was high and disaster prevention and mitigation capacity was weak; and central Shandong, where exposure and hazard were high and disaster prevention and mitigation capacity was also weak. The results of wind disaster risk assessment in Shandong Province showed that the wind disaster risk index and the occurrence of wind disaster in each district and county were significantly consistent in space, and the wind disaster risk assessment index for facility agriculture constructed based on natural disaster risk theory was reasonable and feasible, which could provide reference for scientific management of wind disaster risk and effective disaster prevention and mitigation in facility agriculture.
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Key words:
- Wind disaster /
- Risk assessment /
- Solar greenhouse /
- Plastic greenhouse /
- Shandong Province
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表 1 山东省设施农业风灾气象等级
Table 1. Meteorological rating of wind damage in facility agriculture in Shandong Province
等级
Grade极大风速
Extremely high wind speed (m∙s−1)影响程度
Degree of impact1 [12, 16) 轻度 Mild 2 [16, 20) 中度 Moderate 3 ≥20 重度 Severe 表 2 设施农业面积提取样本信息及准确率
Table 2. Information and accuracy of extracted samples of facility agricultural area
区域类型
Area type样本序号
Sample
number调查面积
Survey area
(hm2)提取面积
Extracted area
(hm2)准确率
Accuracy
(%)主要种植区域
Main planting areas1 37.8 40 94.2 2 26.2 26.9 97.2 3 22 25 86.0 混合种植区域
Mixed planting area1 5.8 5.1 88.8 2 7.6 7.3 96.3 3 7.6 7.2 94.6 -
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