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Questions and Answers
What does a quick rise on the hydrograph indicate?
What does a quick rise on the hydrograph indicate?
- Peak discharge—how much water flows at its max
- The area responds fast to rain (correct)
- Constant stream without rain influence
- The area recovers quickly after rain
What does the flat part at the start of a hydrograph represent?
What does the flat part at the start of a hydrograph represent?
- Peak discharge—how much water flows at its max
- Baseflow—constant stream without rain influence (correct)
- The area responds fast to rain
- The area recovers quickly after rain
What does a hydrograph typically plot on the y-axis?
What does a hydrograph typically plot on the y-axis?
- Water discharge (flow rate) (correct)
- Precipitation events
- Rainfall timing
- Watershed behavior
What does comparing rainfall timing with flow in hydrograph analysis help to determine?
What does comparing rainfall timing with flow in hydrograph analysis help to determine?
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What does hydrograph analysis provide insights into?
What does hydrograph analysis provide insights into?
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Study Notes
Hydrograph Analysis
- A quick rise on the hydrograph indicates a rapid response to rainfall, suggesting a high proportion of surface runoff and a potentially impermeable or saturated soil.
Hydrograph Characteristics
- The flat part at the start of a hydrograph represents the base flow, which is the flow of water that is already present in the river channel before rainfall.
Hydrograph Components
- A hydrograph typically plots discharge or flow rate on the y-axis, with time on the x-axis.
Hydrograph Analysis Applications
- Comparing rainfall timing with flow in hydrograph analysis helps to determine the lag time between rainfall and runoff, which is essential for flood prediction and water resource management.
Insights from Hydrograph Analysis
- Hydrograph analysis provides insights into the hydrological response of a catchment to rainfall, including the storage and transmission of water through the drainage system.
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