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首页> 美国政府科技报告 >Effects of Wind on Rainfall Simulation. Spatial Distribution of WaterApplication, Kinetic Energy, and Overland Flow under Single Full-Cone Nozzle Sprays
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Effects of Wind on Rainfall Simulation. Spatial Distribution of WaterApplication, Kinetic Energy, and Overland Flow under Single Full-Cone Nozzle Sprays

机译：风对降雨模拟的影响。单锥形喷嘴喷雾下水分，动能和地面流动的空间分布

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摘要

Portable rainfall simulators used in small plots give sufficient flexibility tostudy a wide variety of processes (e.g. infiltration, interrill erosion, water quality) on different soils and slopes for a wide range of land uses. They also allow a number of repetitions in a short period of time. In conducting these studies, it is important to measure the characteristics of the simulated rainfall applied to the test surface. It is unquestionable that wind affects field experiments that make use of rainfall simulators. Water-drop trajectories and velocities are altered, affecting water application, kinetic energy distributions, and the hydraulics of underlying overland flow, namely water depths and velocities. The mathematical model presented in this paper should facilitate the selection of single full-cone spray-nozzles (spray angles, ejection velocities, and drop-size distribution) and of the size and configuration of the spray area for expected field situations (rainfall characteristics, wind conditions, slope of terrain, and plot size). It provides a simple way of visualizing spray patterns and overland flow on different sloping surfaces and for different wind conditions.

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