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briefly explain why there is flow observed in the sewer when there is no rainfal

briefly explain why there is flow observed in the sewer when there is no rainfal

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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a.) briefly explain why there is flow observed in the sewer when there is no rainfall?
### Rainfall and Total Inflow Analysis #### Overview This graph presents data recorded over a period spanning from April 25th to April 28th, 2016. The focus is on rainfall and its impact on total inflow, monitored via a system and observed by RE1. #### Rainfall Data - **YAxis (Left) - Rainfall (in/hr):** The topmost graph indicates the rainfall rate over the specified period. - **XAxis - Date/Time:** The horizontal axis extends from April 25, 2016, to April 28, 2016. - **Graph Description:** There appears to be a very brief and minimal rainfall event detected (indicated by precipitation bars just slightly above the 0.0 in/hr marker). The rainfall is minimal, just a small spike above 0.01 in/hr and close to the 26th of April. #### Total Inflow Data - **YAxis (Left) - Total Inflow (cfs):** The bottom graph shows the total inflow measured in cubic feet per second (cfs). - **XAxis - Date/Time:** Similarly, this horizontal axis extends from April 25, 2016, to April 28, 2016. - **Graph Description:** - On April 25th, the inflow values are relatively stable and low, hovering around 2 cfs with minor fluctuations. - On April 26th, there is a significant spike in inflow, reaching approximately 19 cfs, shortly after the detected slight rainfall. - Following this peak, the inflow levels drop back to below 4 cfs by April 27th and remain low and stable through April 28th. #### System and Observational Data - **Legend:** - **System:** This term is not directly represented by a visible line on the graph, but typically denotes automated measurements collected via monitoring systems. - **RE1 (obs):** Represented by the dark brown line, signifies the observational data collected by the RE1 system. This data presentation is crucial in understanding the correlation between rainfall events and subsequent inflow changes, likely for hydrology studies or environmental monitoring purposes. The spike in inflow following a minor rainfall event on April 26th is a key point of interest, indicating how sensitive the system is even to minimal precipitation.
Transcribed Image Text:### Rainfall and Total Inflow Analysis #### Overview This graph presents data recorded over a period spanning from April 25th to April 28th, 2016. The focus is on rainfall and its impact on total inflow, monitored via a system and observed by RE1. #### Rainfall Data - **YAxis (Left) - Rainfall (in/hr):** The topmost graph indicates the rainfall rate over the specified period. - **XAxis - Date/Time:** The horizontal axis extends from April 25, 2016, to April 28, 2016. - **Graph Description:** There appears to be a very brief and minimal rainfall event detected (indicated by precipitation bars just slightly above the 0.0 in/hr marker). The rainfall is minimal, just a small spike above 0.01 in/hr and close to the 26th of April. #### Total Inflow Data - **YAxis (Left) - Total Inflow (cfs):** The bottom graph shows the total inflow measured in cubic feet per second (cfs). - **XAxis - Date/Time:** Similarly, this horizontal axis extends from April 25, 2016, to April 28, 2016. - **Graph Description:** - On April 25th, the inflow values are relatively stable and low, hovering around 2 cfs with minor fluctuations. - On April 26th, there is a significant spike in inflow, reaching approximately 19 cfs, shortly after the detected slight rainfall. - Following this peak, the inflow levels drop back to below 4 cfs by April 27th and remain low and stable through April 28th. #### System and Observational Data - **Legend:** - **System:** This term is not directly represented by a visible line on the graph, but typically denotes automated measurements collected via monitoring systems. - **RE1 (obs):** Represented by the dark brown line, signifies the observational data collected by the RE1 system. This data presentation is crucial in understanding the correlation between rainfall events and subsequent inflow changes, likely for hydrology studies or environmental monitoring purposes. The spike in inflow following a minor rainfall event on April 26th is a key point of interest, indicating how sensitive the system is even to minimal precipitation.
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