进而以流域分级理论为依据，将坡面、小流域、区域、全流域四个层次的模型整合成一个完整的流域整体模型。

The suggested model has four kinds of module, which are slope module, sub-basin module, region module and entire basin module.

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制定模型的层次细节、损伤分级、纹理和分组规则，并采用模糊综合评判方法确定离散LOD等级。

Model rules on LOD, grades of damage, texture and grouping are constituted, and the fuzzy synthetically evaluation method is used to choose the level of discrete LOD.

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