预测土壤面蚀量,是规划与设计相应的水土保持措施的依据,是水土保持的基础工作之一。土壤侵蚀是一种在多因素作用下产生的客观现象,影响它的因素既有自然方面的,也有社会经济方面的。各国水保工作者在长期的理论研究和工程实践中,观察、分析这一现象产生的过程及其主要的制约因素,探索了各种关系与机理,建立了多种多样的算式,试图描述水土流失的规律。 Forecasting the amount of soil erosion is the basis for planning and designing corresponding soil and water conservation measures and is one of the basic work of soil and water conservation. Soil erosion is an objective phenomenon produced under the influence of many factors. The factors that affect it are natural as well as socio-economic. In the long-term theoretical research and engineering practice, national water conservancy workers observe and analyze the process of this phenomenon and its main constraints, explore various relationships and mechanisms, establish a variety of formulas, and try to describe the soil and water The law of loss.