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roblem I: Figure 1 shows the flow hydrograph from a storm at the watershed outlet. Label the: (1) Initial abstraction (2) Direct flow hydrograph and baseflow (3) Time to peak, time of concentration, and time base of the direct flow hydrograph infiltration 1+ Figure 1. The hyetograph of a storm and the resulting flow hydrograph at the watershed outlet.

roblem I: Figure 1 shows the flow hydrograph from a storm at the watershed outlet. Label the: (1) Initial abstraction (2) Direct flow hydrograph and baseflow (3) Time to peak, time of concentration, and time base of the direct flow hydrograph infiltration 1+ Figure 1. The hyetograph of a storm and the resulting flow hydrograph at the watershed outlet.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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**Hydrograph Analysis from a Storm** **Problem 1:** The diagram exhibits the flow hydrograph resulting from a storm event. ### Aspects to Label: 1. **Initial Abstraction**: This refers to the initial portion of precipitation that does not contribute to direct runoff, such as infiltration and surface storage. 2. **Direct Flow Hydrograph and Baseflow**: The hydrograph should differentiate between the direct runoff, indicated by the rising and falling limbs, and the baseflow, which is the sustained flow between storm events. 3. **Time to Peak, Time of Concentration, and Time Base of the Direct Flow Hydrograph**: - **Time to Peak**: The duration from the start of the rainfall event until the hydrograph reaches its peak discharge. - **Time of Concentration**: The time it takes for water to travel from the most distant point in the watershed to the watershed outlet. - **Time Base**: The total time period over which the direct runoff occurs. ### Diagram Explanation: - **Infiltration Capacity Graph**: Located on the left, the inset graph displays the infiltration rate decreasing over time (i), as shown by the red line. This decrease typically follows an exponential decay pattern. - **Main Hydrograph Curve**: On the right, the hydrograph plot emphasizes the relationship between discharge (Q) over time (t). The curve initially rises, reaches a peak, and then recedes, illustrating the typical response of a watershed to a rainfall event. **Figure Reference**: Caption - "The hydrograph of a storm and the resulting flow hydrograph at the watershed outlet."
Transcribed Image Text:**Hydrograph Analysis from a Storm** **Problem 1:** The diagram exhibits the flow hydrograph resulting from a storm event. ### Aspects to Label: 1. **Initial Abstraction**: This refers to the initial portion of precipitation that does not contribute to direct runoff, such as infiltration and surface storage. 2. **Direct Flow Hydrograph and Baseflow**: The hydrograph should differentiate between the direct runoff, indicated by the rising and falling limbs, and the baseflow, which is the sustained flow between storm events. 3. **Time to Peak, Time of Concentration, and Time Base of the Direct Flow Hydrograph**: - **Time to Peak**: The duration from the start of the rainfall event until the hydrograph reaches its peak discharge. - **Time of Concentration**: The time it takes for water to travel from the most distant point in the watershed to the watershed outlet. - **Time Base**: The total time period over which the direct runoff occurs. ### Diagram Explanation: - **Infiltration Capacity Graph**: Located on the left, the inset graph displays the infiltration rate decreasing over time (i), as shown by the red line. This decrease typically follows an exponential decay pattern. - **Main Hydrograph Curve**: On the right, the hydrograph plot emphasizes the relationship between discharge (Q) over time (t). The curve initially rises, reaches a peak, and then recedes, illustrating the typical response of a watershed to a rainfall event. **Figure Reference**: Caption - "The hydrograph of a storm and the resulting flow hydrograph at the watershed outlet."
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