gen-define-precipitation-measurement-and-give-one-short-worked-e-1356

Define precipitation measurement and give one short worked example.

# Precipitation Measurement **Precipitation measurement** is the quantitative determination of the amount of water (in liquid or solid form) that falls from the atmosphere to the Earth's surface over a specific time period and area. It is typically expressed as **depth of water** (mm or inches) accumulated over a collection area. ## Common Methods: - **Rain gauges** (manual or automatic) - **Weather radar** - **Satellite estimation** --- ## Worked Example **Problem:** A cylindrical rain gauge has a collecting funnel with diameter 20 cm. After a storm, the collected water measures 157 mL. Calculate the precipitation depth. **Solution:** 1. **Find the collection area:** - Radius = 20/2 = 10 cm - Area = πr² = π(10)² = 314.16 cm² 2. **Convert volume to depth:** - Volume = 157 mL = 157 cm³ - Depth = Volume/Area = 157/314.16 = **0.5 cm = 5 mm** **Answer:** The precipitation was **5 mm**. This means that if the rain fell uniformly over a flat surface, it would create a water layer 5 mm deep.