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Rainfall simulator
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Rainfall simulator
A rainfall simulator is used in soil science and hydrology to study how soil reacts to rainfall. Natural rainfall is difficult to use in experimentation because its timing and intensity cannot be reliably reproduced. Using simulated rainfall significantly speeds the study of erosion, surface runoff and leaching.
The simplest rainfall simulators qualitatively demonstrate what happens to soil during rainfall events. They are useful for explaining how fertilizer may run off (wash away) rather than supply nutrients to crops.
The evolution of the rainfall simulator started in the late 1800s when German Scientist Ewald Wollny formally studied erosion. As the study continued into the early 1910s, experimental field plots were designed to capture runoff from natural rainfall. In the 1930s, pioneers of erosion studies tightened control of their experiments by building the first rainfall simulators, ordinary sprinkle cans or pipes with holes. These holes were replaced in the 1960s with full cone nozzles, carefully selected to accurately approximate:
Simulators of the 1960s could simulate only a single rainfall intensity. By the 1980s, solenoid valves could modulate water flow to dynamically vary the intensity of simulated rainfall, much as rainfall intensity naturally varies in storms. As the technology matured in the early 1990s, rainfall simulators were used in the United States as part of the Water Erosion Prediction Project to update the universal soil loss equation.
Modern research simulators are typically designed around the tasks they are intended to perform, ranging from simple demonstrations for farmers to the advanced scientific study of erosion, surface runoff, and sediment size. Other scientific studies may include evaluating tillage management, the effects of soil compaction, soil crusting, and infiltration in agricultural soils.
In erosion studies, if no crop canopy is present over the soil, the size distribution and terminal velocity of the raindrop must be accurately simulated, as they affect splash erosion.
The main components of a rainfall simulator are the drop generator, a water feed system, and possibly a windshield.
The water feed system can be either unpressurized or pressurized. Unpressurized systems usually consist of a water tank suspended above a field plot. Gravity moves the water to the plot. Pressurized systems use a pump to move water to the plot.
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Rainfall simulator AI simulator
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Rainfall simulator
A rainfall simulator is used in soil science and hydrology to study how soil reacts to rainfall. Natural rainfall is difficult to use in experimentation because its timing and intensity cannot be reliably reproduced. Using simulated rainfall significantly speeds the study of erosion, surface runoff and leaching.
The simplest rainfall simulators qualitatively demonstrate what happens to soil during rainfall events. They are useful for explaining how fertilizer may run off (wash away) rather than supply nutrients to crops.
The evolution of the rainfall simulator started in the late 1800s when German Scientist Ewald Wollny formally studied erosion. As the study continued into the early 1910s, experimental field plots were designed to capture runoff from natural rainfall. In the 1930s, pioneers of erosion studies tightened control of their experiments by building the first rainfall simulators, ordinary sprinkle cans or pipes with holes. These holes were replaced in the 1960s with full cone nozzles, carefully selected to accurately approximate:
Simulators of the 1960s could simulate only a single rainfall intensity. By the 1980s, solenoid valves could modulate water flow to dynamically vary the intensity of simulated rainfall, much as rainfall intensity naturally varies in storms. As the technology matured in the early 1990s, rainfall simulators were used in the United States as part of the Water Erosion Prediction Project to update the universal soil loss equation.
Modern research simulators are typically designed around the tasks they are intended to perform, ranging from simple demonstrations for farmers to the advanced scientific study of erosion, surface runoff, and sediment size. Other scientific studies may include evaluating tillage management, the effects of soil compaction, soil crusting, and infiltration in agricultural soils.
In erosion studies, if no crop canopy is present over the soil, the size distribution and terminal velocity of the raindrop must be accurately simulated, as they affect splash erosion.
The main components of a rainfall simulator are the drop generator, a water feed system, and possibly a windshield.
The water feed system can be either unpressurized or pressurized. Unpressurized systems usually consist of a water tank suspended above a field plot. Gravity moves the water to the plot. Pressurized systems use a pump to move water to the plot.
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