The experimental study of hydrodynamic characteristics of the overland flow on a slope with three-dimensional Geomat

• Published in: Journal of hydrodynamics. Series B Vol. 30; no. 1; pp. 153 - 159
• Main Author: 王广月;孙国瑞;李建康;李炯
• Format: Journal Article
• Language: English
• Published: Singapore Springer Singapore 01.02.2018; School of Civil Engineering, Shandong University, Jinan 250061, China
• Subjects: Engineering; Engineering Fluid Dynamics; Hydrology/Water Resources; Numerical and Computational Physics; Simulation; 水动力学特征;流动;三维;陆上;学习;试验性;动力学过程;模拟系统; Three-dimensional Geomat; slope gradient; overland flow; rainfall intensity; hydrodynamic characteristics
• ISSN: 1001-6058; 1878-0342
• DOI: 10.1007/s42241-018-0016-7

The hydrodynamic characteristics of the overland flow on a slope with a three-dimensional Geomat are studied for different rainfall intensities and slope gradients. The rainfall intensity is adjusted in the rainfall simulation system. It is shown that the velocity of the overland flow has a strong positive correlation with the slope length and the rainfall intensity, the scour depth decreases with the increase of the slope gradient for a given rainfall intensity, and the scour depth increases with the increase of the rainfall intensity for a given slope gradient, the overland flow starts with a transitional flow on the top and finishes with a turbulent flow on the bottom on the slope with the three-dimensional Geomat for different rainfall intensities and slope gradients, the resistance coefficient and the turbulent flow Reynolds number are in positively related logarithmic functions, the resistance coefficient and the slope gradient are in positively related power functions, and the trend becomes leveled with the increase of the rainfall intensity. This study provides some important theoretical insight for further studies of the hydrodynamic process of the erosion on the slope surface with a three-dimensional Geomat.