How to calculate precipitation

Precipitation calculation methods: capture method, radar reflectivity method, satellite remote sensing method, numerical simulation method.

Precipitation refers to the total amount of precipitation in a certain area during a specific time period. There are many methods for calculating precipitation, and each method has specific application scenarios.

Different calculation methods may have certain errors in practical applications. Therefore, it is necessary to select an appropriate calculation method according to the actual situation and conduct calculation and analysis based on actual measured data.

1. Capture method

Use a vessel with a specific area to collect precipitation within a certain period of time, and then divide the collected precipitation by the area of ??the vessel to obtain the unit area Precipitation amount, then multiply the precipitation amount per unit area by the total area of ??the area to get the total precipitation amount.

For example, place a container with an area of ??100 square centimeters in a certain city and collect a day's precipitation. The precipitation per unit area is 10 millimeters. The total area of ??the city is 100 square kilometers, so the total precipitation is 100 square kilometers times 10 millimeters equals 10 million cubic meters of precipitation.

2. Radar reflectivity method

Use weather radar to measure reflectivity and determine precipitation by calculating changes in reflectivity. For example, within the monitoring range of weather radar, when a certain degree of echo signal is detected, the precipitation amount can be calculated based on the intensity and duration of the echo signal.

3. Satellite remote sensing method

Use satellite remote sensing technology to determine precipitation by analyzing the reflection and radiation data of clouds. For example, satellite remote sensing technology can be used to predict extreme weather such as tropical cyclones and calculate precipitation in the predicted area.

4. Numerical simulation method

Use numerical simulation technology to simulate the physical processes in the entire atmospheric environment to predict precipitation. For example, numerical simulation technology can be used to predict extreme weather such as typhoons and heavy rains, and calculate the precipitation in the predicted area.

1. Why does precipitation affect agricultural production

Precipitation is an important factor in agricultural production. It directly affects the growth and development of crops. Too much or too little precipitation Any amount will have an adverse effect on crop growth, thus affecting agricultural production.

2. What does the seasonal distribution of precipitation mean?

The seasonal distribution of precipitation refers to the proportion of precipitation in different seasons of the year to the total precipitation throughout the year. The seasonal distribution of precipitation in different regions is different, which has an important impact on the climate and ecological environment of the region.