Chapter 9 of 12
Revision Notes
Measurement of Water — Revision Notes
Maharashtra Board · Class 10 · Water Security
Measurement of Water revision notes for Maharashtra Board Class 10 Water Security: 4 topics in quick points. Includes Water cycle and the need.
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Key Topics to Revise
1
1. Water cycle and the need for measurement
- All groundwater originates from the water cycle.
- Measurement is needed for vapour, rain, flowing water, stagnant water, and seeping water.
- Proper measurement helps in preserving water resources.
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2. Rainfall measurement
- The device used to measure rainfall is called a rain gauge.
- A rain gauge is a cylindrical flat-bottom measuring cylinder with a funnel top.
- The funnel mouth diameter is 127 mm and the edge height is 110 mm.
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3. Evaporation measurement
- Evaporation rate is measured by an evaporator.
- The evaporator is a shallow rounded iron vessel with a diameter of 1.2 m and depth 30 cm.
- It is painted white on both sides.
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4. Surface flow measurement
- Flowing water can be measured by orifices, meter gates, wears, flumes, and V-notch.
- The V-notch method uses a wooden or iron plank with a V-shaped triangular notch in the center.
- The angle of the notch is 90 degrees.
Get complete notes with diagrams and examples
Full NotesKey Concepts
A rain gauge is usedAn evaporator measures evaporationFlowing water is measured using instrumentsZirpa is used to measure seepageStored water is measured by stationary
Frequently Asked Questions
What are the important topics in Measurement of Water for Maharashtra Board Class 10 Water Security?
Key topics in Measurement of Water include Water cycle and the need for measurement, Rainfall measurement, Evaporation measurement, Surface flow measurement. Study these first, then practise questions on each for the Maharashtra Board Class 10 board exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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