|The analysis and accounting on the damages induced by water hazards and the effects arising from water affairs
|中文关键词: 水害损失 水利综合效应 和集差 S型曲线 长江三角洲
|英文关键词: damage induced by water the effect arising from water affair the difference in aggregation and sum set S-shaped curve Yangtze Delta
| Reducing the damages induced by the water hazards is recognized as the development goal in water sector under the new period. Therefore, the systematic and correct accounting on the losses induced by water hazards is vital for the target achieved. This paper conducts a series of analyses:defining the damages induced by water hazards from the perspective of resources and environment economics; explaining the phenomenon that total losses of water induced disasters are unequal to the sum of individual disaster insettheory; furthermore namingit after the effect on the difference in aggregation and sum set, which helps us to well understand the interactive relationship between the individual loss and the total. The process of disaster loss in an S-shaped curve is explored based on the interactive process of energy accumulation and resisting effect. A unique function is derived as well. However, it is subject to the nature of disaster. A complete S-shaped curve is widely observed in the original disaster from natural phenomenon; whereas, the loss from artificial disturbance only appears the bottom part of an S-shaped curve. A calculating framework consists of the method on individual loss and value shifting in the relief and offset of losses during the alternation of these natural hazards. Finally,an example on Yangtze Delta is described in detail.