Estimation on Indirect Economic Losses of Geomorphic Hazards——Taking debris flow as an example
地貌灾害间接经济损失评估 ———以泥石流灾害为例

Debris flow is one of the geomorphic hazards. The economic losses caused by debris flows are not yet accounted precisely at present. One of causes is the statistics is not specified for each kind of disasters by different type of natural hazards; another cause is the problems of disas- ter loss statistics, i.e., quantitative disaster loss estimation have not been solved yet till now. A- mong the disaster losses, the direct economic loss estimation depends on technical method; while the indirect economic loss estimation depends not only technical supports but also scientific bases. Therefore, there is not acknowledged method for the quantitative estimation of indirect economic losses of disasters. The present paper proposes two estimation methods: one is survey analysis, and another is proportional coefficient. The former is feasible in theory but unfeasible in actuality, and is only a scheme; the latter is practicable but empirical, and is only a crude estimation. Consider- ing the needs of disaster reduction and mitigation currently, the method of proportional coefficient for estimation of indirect economic losses of disasters is recommended.