2025-06-05 Agricultural Environmental Engineering Practice "Evaluation of Rainfall Uniformity of a Small-Scale Artificial Rainfall Device"
Faculty of Agriculture Department of Ecoregion Science I was able to observe the "Agricultural Environmental Engineering Training" of 3rd year students! In this class, students will learn about the role of agricultural and environmental engineering through various practical trainings.
Today we will introduce an experiment conducted by Professor Watanabe Hirozumi titled "Evaluating the uniformity of rainfall from a small artificial rainmaking device."
The first photo is a small artificial rain machine! The artificial rain machine was developed as a tool to analyze the effects of rain on soil. There are electric fans around it to reproduce the irregular rainfall of nature.
This time, we conducted an experiment to evaluate the uniformity of the amount of rainfall produced by the device. As shown in the second photo, the device has 175 thin needles with an inner diameter of 0.337 mm, and the water droplets fall from these needles.
In the third photo, Professor Watanabe first gave an explanation of the experiment.
Photos 4 to 6 show the students finally starting their experiment!
The participants were divided into two groups, with different rainfall settings. First, a rain catcher was placed on the device and rain was collected for two minutes.
After 2 minutes, move the tub and measure the amount of water in it.
Scooping up every last drop!
The same measurement was repeated twice, obtaining a total of three sets of data.
In photos 7 to 9, Wan lined up nine cups on top of a rain bucket to check whether the amount of rain varied depending on the location.
After 5 minutes, move the tray and measure the amount of water in the cup.
This one also collected data a total of three times.
Once the experiment is completed, the results and observations are compiled into a report.
When rain falls on a field, organic matter and nutrients contained in the soil are washed away, which can cause problems such as a decline in soil fertility and deterioration of water quality. Artificial rain machines are effective in analyzing problems that occur with rainfall, and are useful for preserving farmland and the water environment!
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Related links
- Faculty of Agriculture Department of Ecoregion Science
- Faculty of Agriculture Department of Ecoregion Science Prof. Hirozumi Watanabe Researcher Information
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Faculty of Agriculture Department of Ecoregion Science Hirozumi Watanabe Laboratory Website
- Tokyo University of Agriculture and Technology Official Instagram (@tuat_hakkenkoken)
