Building a BP model by MATLAB to estimate flood damage grade which has complicated uncertain relation between flood damage appraised index,the model has been proved as one kind of fleetness,reliable appraise method by example.

• 针对洪水灾情评价指标与洪水灾害灾情等级之间的复杂的、不确定的关系,建立了适于洪水灾害灾情等级评价的BP神经网络模型,运用MATLAB来快速估算洪水灾害灾情的等级。 经实例验证,该方法为一种快速、可靠的灾情评价方法。