灾害熵:概念引入及应用案例

Disaster entropy:conception and application

某一区域的灾害风险反映了该区域灾害发生的不确定性。据此，本文采用信息熵的理论与方法，引入了区域灾害熵和区域交害加权熵概念，并给出了相应的计算公式。选取山东省作为应用案例研究的区域，利用1949～1994年旱灾、洪涝灾害受灾面积资料计算了旱灾、洪涝灾害的区域灾害熵和区域灭害加权熵，研究结果表明，区域灾害加权熵可以作为表征区域灾害风险整体水平的一个综合指标。本文给出的区域灾害熵计算方法简便易行。

Regional disaster risk can be considered as the renection of the occurrence probabilityof regional disaster. In terms of information system theory, the author proposes the concep-tions of regional disaster entropy and weighted regional disaster entropy, and provides theircalculation formula In case study, the author calculates the regional disaster entropy andweighted regional disaster entropy wlth the damage area data of drought disaster andflood-waterlogging disaster from 1949 to 1994 in Shandong Province. The result shows thatthe weighted regional disaster entropy can be regarded as a comprehensive index of regional dis-aster risk level, and the method of regional disaster entropy and weighted regional disasterentropy calculation given in this paper is simple and convenient.