Predicting rainfall erosion losses : a guide to conservation planning
Predicting rainfall erosion losses : a guide to conservation planning
复制标题
DOI：
--
复制
发表时间：
1978
期刊：
影响因子：
--
通讯作者：
W. H. Wischmeier;D. Smith
中科院分区：
文献类型：
--
作者：
W. H. Wischmeier;D. Smith
通用土壤流失方程（USLE）使规划者能够预测与特定土壤类型、降雨模式和地形相关的每种可行的作物系统和管理措施组合的土壤侵蚀平均速率。当这些预测的损失与给定的土壤流失容限进行比较时，它们为在规定的范围内进行侵蚀控制提供了具体的指导方针。该方程将影响侵蚀率的众多相互关联的物理和管理参数归为六个主要因素，其具体地点的数值可以用数字表示。在许多州进行的半个世纪的侵蚀研究提供了信息，从这些信息中至少可以获得美国特定农田或其他小的易受侵蚀地区的USLE因子的近似值。本手册中提供的表格和图表可供实地使用。数据中的重大局限性被确定。USLE是一种侵蚀模型，用于计算特定条件下片蚀和细沟侵蚀的长期平均土壤流失量。它也适用于建筑工地和其他非农业条件，但它不能预测沉积，也不能计算沟，河岸和河床侵蚀的产沙量
The Universal Soil Loss Equation (USLE) enables planners to predict the average rate of soil erosion for each feasible alternative combination of crop system and management practices in association with a specified soil type, rainfall pattern, and topography. When these predicted losses are compared with given soil loss tolerances, they provide specific guidelines for effecting erosion control within specified limits. The equation groups the numerous interrelated physical and management parameters that influence erosion rate under six major factors whose site-specific values can be expressed numerically. A half century of erosion research in many states has supplied information from which at least approximate values of the USLE factors can be obtained for specified farm fields or other small erosion prone areas throughout the United States. Tables and charts presented in this handbook make this information available for field use. Significant limitations in the data are identified. The USLE is an erosion model designed to compute longtime average soil losses from sheet and rill erosion under specified conditions. It is also useful for construction sites and other non-agricultural conditons, but it does not predict deposition and does not compute sediment yields from gully, streambank, and streambed erosion