关键词: 日光温室, 风险, 重现期, 脆弱性曲线, 风灾损失率

Abstract: Based on the disaster risk assessment theory and climate probability distribution model, the wind disaster risk to greenhouse in Hebei province was evaluated. The vulnerability curves of wind speed—solar greenhouse loss rate were constructed, considering disaster-causing factor and bearing body. The results showed that, with the increase of return periods, the strength and incidence of hazard factor and loss risk was greater. In terms of space, the southeastern area with low terrain had the highest hazard factor risk, mainly located in the eastern part of Cangzhou, as well as the northern Hengshui and eastern Handan. The extreme wind velocity was above 32.6 m/s. The basic wind pressure was consistent with the landforms’ distribution. The basic wind pressure was consistent with the distribution of the three landforms, with the high value occurring in the northwest plateau area and the plain area to the east of Taihang and the south of Yanshan Mountain areas. The vulnerability curve indicated that the threshold of wind speed which might cause loss to greenhouse was 20.0 m/s. The risk of greenhouse loss was affected by the combined effects of disaster-causing factor and bearing body. The risk in the northwest was generally lower than the southeast. The high-risk area was distributed in the junction of Tangshan-Qinhuangdao, western Tangshan, Langfang and south-central regions. The average loss was more than 500 000 yuan/km². The greenhouse area in the south-central part was smaller than that in the northeast, but the loss was higher owing to its higher hazard factor risk.

Key words: greenhouse, risk, return period, vulnerability curver, wind disaster loss rate