崩岗被称为华南红壤区的“生态溃疡”。崩岗流域沟谷侵蚀是华南地区地表侵蚀的剧烈表现，也是水力-重力复合侵蚀的典型代表。崩岗泥砂流是崩岗沟谷流域侵蚀产沙的主要驱动力，研究崩岗泥砂流的产流机理和输沙过程，具有重要的科学价值和实践意义。本项目基于地貌过程的形态发生学原理，采用野外人工模拟降雨试验手段，结合地形测量学分析方法，在研究崩岗泥砂流物源土体和沉积物及流体理化性质基础上，探讨崩岗泥砂流的启动条件及产流过程和影响因素，开展崩岗泥砂流和沟谷流域侵蚀输沙特征的实证研究，认知崩岗泥砂流的本质特性，建立崩岗泥砂流产流输沙的Prototype模型和沟谷流域侵蚀产沙的Morphometry模型。这一研究可更好地理解和认识崩岗流域沟谷侵蚀的过程和机理，为华南地区“生态溃疡”的修复和治理提供科技支撑。

Benggang is called "ecological ulcer" in red soil of southern China. Benggang gully erosion is one of the severest forms of earth-surface erosion in south of China; it is also the typical compound erosion of water and gravity. Mud-sand flow is the main driving force for the erosion and sediment production in Benggang catchment. Studies on the runoff mechanisms and sediment transport processes of mud-sand flow are of significant importance. This project is based on the morphogenetic principles of geomorphic processes, by the field artificial simulated rainfall experiments, and combined with the topographic survey analysis methods, studies the physical and chemical properties of source soils, sediments and fluid of mud-sand flow, approaches the starting conditions, flow-producing processes and influencing factors of mud-sand flow, carries out the empirical researches on the characteristics of erosion and sediment transport of mud-sand flow, recognizes the essential characteristics of mud-sand flow, and finally establishes the Prototype Model for runoff production and sediment transport of mud-sand flow, as well as the Morphometry Model for Benggang gully erosion and sediment yield. This study can better understand the process and mechanism of gully erosion in Benggang watershed, and provide scientific and technological support for the restoration and treatment of "ecological ulcers" in south of China.