从国民经济整体角度，对洪灾损失进行分类，确定了洪灾经济损失评估的计算准则。
On the benefit of the whole national economy, the loss of flood damage is classified, and principles of evaluating the economic loss of flood damage are suggested.
最后依据干旱指数建立了干旱受灾面积和成灾面积评估模式，以及干旱经济损失评估模式。
Finally, assessment the model of area covered by drought, the area affected by drought and the economic losses of agriculture by drought is established according the drought index.
在分析森林生态系统所发挥的功能与效益的基础上，提出了森林病虫害灾害经济损失评估的指标体系。
According to the main functions and benefits of forestry ecological system, the index system of the economic losses of forest pest disaster evaluation was determined.
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