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通过对有林和无林流域量水堰１９９２年９月至１９９３年７月观测数据的对比分析得出，和无林流域相比，有林流域减少径流量５７．５％，洪峰流量２０％～９０％；在雨季有林流域最明显的保水特征是增加了对连续降雨的吸收（截留和入渗）和消耗（蒸腾）．
By comparing the observation data of heavy weir with or without forest in September 1992 to July 1993, it is found that compared with the non-forest catchment, the forest catchment reduces the runoff by 57.5% and the flood peak by 20% ~ 90%. In the rainy season, the most obvious water conservation feature in the catchment is to increase the absorption (entrapment and infiltration) and consumption (transpiration) of continuous rainfall.