Podcast
Questions and Answers
What is the simplest way to measure river stage?
What is the simplest way to measure river stage?
Which type of manual gage involves lowering a weight from a bridge or overhead structure?
Which type of manual gage involves lowering a weight from a bridge or overhead structure?
What records the pressure requirement to maintain a small flow of gas?
What records the pressure requirement to maintain a small flow of gas?
Where are crest-stage gages used?
Where are crest-stage gages used?
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Which current meter consists of six conical cups rotating about a vertical axis?
Which current meter consists of six conical cups rotating about a vertical axis?
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What is the purpose of bubble gages?
What is the purpose of bubble gages?
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Where is the sectional staff gage used?
Where is the sectional staff gage used?
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What is the function of a wire-weight gage?
What is the function of a wire-weight gage?
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What is the purpose of crest-stage gages?
What is the purpose of crest-stage gages?
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What is the function of water or mercury-filled manometers in relation to reservoir water levels?
What is the function of water or mercury-filled manometers in relation to reservoir water levels?
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Study Notes
River Stage Measurements
- The simplest way to measure river stage is using a staff gage, which provides a visual reference of the water level.
Manual Gages
- A wire-weight gage involves lowering a weight from a bridge or overhead structure to measure water level.
Pressure Measurement
- A manometer records the pressure requirement needed to maintain a small flow of gas, indicating pressure changes related to flow.
Crest-Stage Gages Usage
- Crest-stage gages are used in flood-prone areas to record maximum water levels reached during high-flow events.
Current Meters
- The OTT current meter features six conical cups that rotate around a vertical axis, measuring water velocity.
Bubble Gages
- Bubble gages serve the purpose of providing a continuous measurement of water level through the displacement of air or gas bubbles.
Sectional Staff Gage
- Sectional staff gages are typically placed in reservoirs to measure water levels at various depths and locations.
Wire-Weight Gage Function
- The function of a wire-weight gage is to provide a direct, manual measurement of water depth by measuring the length of wire that is submerged.
Crest-Stage Gages Purpose
- The purpose of crest-stage gages is to offer a historical record of the highest water levels that can be compared to future flood conditions.
Manometers and Water Levels
- Water or mercury-filled manometers measure discrepancies in pressure, effectively indicating the level of water in a reservoir through changes in pressure.
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Description
Learn about different methods of measuring river stage, including manual gages like staff gages and wire-weight gages, and recording gages like continuous-chart recorders and bubble gages.
