VISUAL SIMULATION METHOD OF RUNOFF IN LANDSCAPE SPACE BASED ON UAV TILT PHOTOGRAPHY

Stormwater management caused by site runoff changes has become the focus of current landscape spatial planning. High precision terrain data is conducive to accurate simulation and scientific analysis of runoff. With the popularity of UAV, UAV has been widely used in landscape space planning. This study takes Fangmazhou Park in Hunan Province of China as an example and uses UAV tilt photography to make centimeter-level high-precision 3D models. Based on the Rhino-Grasshopper platform, the real-time rainfall data and the 3D model of the site are parameterized in order to obtain the real-time runoff simulation data and realize the simulation and analysis of the rainwater flow direction, flow rate and inundation range in landscape space. As the basis of landscape space rainstorm waterlogging risk management, this method provides more accurate and effective analysis for landscape spatial planning and performance evaluation.