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潜水流域的水土流失具有明显的时控性。流域内易遭受风化剥蚀的岩石,是水土流失严重的原生地质环境。风化作用受降水、气温控制,一年中冬季、春初为物理风化作用为主时期,其余为化学风化作用为主时期。流域土壤流失量与降水量、河川流量呈正相关关系,5～9月土壤流失最严重。这一规律的发现,为综合治理流域水土流失灾害提供了科学的依据。
Submarine watershed soil erosion has obvious time control. Rocks that are vulnerable to weathering and erosion in the basin are the primary geological environment with serious soil erosion. Weathering is affected by precipitation and temperature control. During the year, winter and early spring are the main periods of physical weathering, and the rest are dominated by chemical weathering. Soil erosion in the basin is positively correlated with precipitation and river flow, and the soil erosion is the most serious from May to September. The discovery of this law provides a scientific basis for the comprehensive management of the soil and water loss in the basin.