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在乔治亚山麓地带,为确定松林皆伐和更新的影响的一组流域试验表明:干燥土壤上小型暴雨径流可能要增加50％或更多,从潮湿土壤上泄流出的大型暴雨径流可能仅增加10％～15％。连年洪水量属于后种类型,试验结果推论为:森林作业对溪流和大河下游洪水的影响是无显著关系的。尽管森林作业之后,泄流洪峰率即可增加30％～45％,但在四年的采伐,林地整理和机械植树造林中,暴雨的侵蚀只增加了55％,当考虑到对土壤的破坏会引起侵蚀危害增加时,与典型的南方森林作业有关的径流侵蚀增加提醒森林经营者们:在对道路设计、更新方法选择,溪流旁防护带保护时要多加注意。
A series of watershed trials in Georgia foothills to determine the effect of clear-cut and clear-cut pine forests have shown that small-scale storm runoff on dry soils may increase by 50% or more and large-scale storm runoff from wet soils may only increase by 10 % ~ 15%. Year after year floods belong to the latter type, the test results concluded that: the impact of forest operations on the river and downstream flood is not significant. Despite the 30% ~ 45% increase in flood discharge after forest operations, rainstorm erosion increased by only 55% during four years of harvesting, woodland reforestation and mechanical afforestation, taking into account the damage to the soil Increased runoff erosion associated with typical southern forest operations, caused by increased erosion hazards, warns forest managers: pay more attention to road design, options for retrofitting options, and protection of the perch next to streams.