Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > A hydrograph is a plot ofa)rainfall intensity...
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A hydrograph is a plot of
- a)rainfall intensity against time
- b)stream discharge against time
- c)cumulative rainfall against time
- d)cumulative runoff against time
Correct answer is option 'B'. Can you explain this answer?
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A hydrograph is a plot ofa)rainfall intensity against timeb)stream dis...
Understanding Hydrographs
A hydrograph is a crucial tool used in hydrology and civil engineering to analyze the relationship between rainfall and streamflow. It provides valuable insights into how a watershed responds to precipitation events.
Definition of Hydrograph
- A hydrograph is a graphical representation that plots **stream discharge against time**.
- Discharge, measured in cubic meters per second (m³/s), indicates the volume of water flowing through a river or stream at a given time.
Importance of Hydrographs
- Hydrographs help in understanding the **timing and magnitude** of runoff from a watershed.
- They are instrumental in flood forecasting, water resource management, and designing hydraulic structures.
Components of a Hydrograph
- **Rising Limb**: Indicates the increase in discharge following a rainfall event.
- **Peak Discharge**: The maximum flow rate observed during the event.
- **Falling Limb**: Represents the decrease in discharge as the runoff diminishes.
- **Base Flow**: The normal flow of the river when there is no rainfall.
Applications of Hydrographs
- Used in **flood risk assessment** and management by predicting flood peaks.
- Assists in designing **drainage systems** and stormwater management plans.
- Helps in evaluating the **impact of land use changes** on watershed hydrology.
In summary, the correct answer to the question about hydrographs is option 'B', as it specifically illustrates the behavior of stream discharge over time, providing essential data for various engineering and environmental applications.
A hydrograph is a crucial tool used in hydrology and civil engineering to analyze the relationship between rainfall and streamflow. It provides valuable insights into how a watershed responds to precipitation events.
Definition of Hydrograph
- A hydrograph is a graphical representation that plots **stream discharge against time**.
- Discharge, measured in cubic meters per second (m³/s), indicates the volume of water flowing through a river or stream at a given time.
Importance of Hydrographs
- Hydrographs help in understanding the **timing and magnitude** of runoff from a watershed.
- They are instrumental in flood forecasting, water resource management, and designing hydraulic structures.
Components of a Hydrograph
- **Rising Limb**: Indicates the increase in discharge following a rainfall event.
- **Peak Discharge**: The maximum flow rate observed during the event.
- **Falling Limb**: Represents the decrease in discharge as the runoff diminishes.
- **Base Flow**: The normal flow of the river when there is no rainfall.
Applications of Hydrographs
- Used in **flood risk assessment** and management by predicting flood peaks.
- Assists in designing **drainage systems** and stormwater management plans.
- Helps in evaluating the **impact of land use changes** on watershed hydrology.
In summary, the correct answer to the question about hydrographs is option 'B', as it specifically illustrates the behavior of stream discharge over time, providing essential data for various engineering and environmental applications.
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A hydrograph is a plot ofa)rainfall intensity against timeb)stream discharge against timec)cumulative rainfall against timed)cumulative runoff against timeCorrect answer is option 'B'. Can you explain this answer?
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