Determine the following:a.The WQDvfor the basinb.The volume and water surface elevation of the micropoolc.The water surface elevation of the WQDvd.The size of the water quality outletorifice The image is a graph depicting the relationship between elevation and storage capacity. **Graph Details:**- **X-axis (Horizontal):** Represents elevation in feet (ft). The scale ranges from 30 ft to 33 ft, with markings at every 0.5 ft interval.- **Y-axis (Vertical):** Represents storage capacity in cubic feet (ft³). The scale ranges from 0 to 100,000 ft³, with markings at every 10,000 ft³ interval.**Curve Description:**- The graph shows a curve that starts near the origin and rises steeply as the elevation increases. It illustrates a positive relationship between elevation and storage.- At lower elevations (around 30 ft), the storage capacity is minimal. As the elevation increases beyond 31 ft, the storage capacity grows significantly, with a sharp increase noted especially beyond 32 ft.This graph effectively demonstrates how storage capacity expands rapidly with slight increases in elevation, illustrating exponential growth. **Extended Detention Basin Design for Impervious Watershed****Scenario:**An extended detention basin is required for a watershed covering 40 acres, with 42% of the area being impervious surfaces. The design of the basin needs to incorporate a water quality design volume (WQDv) calculated as 0.5 inches multiplied by the impervious area. The drawdown time for the basin is specified to be 30 hours. To enhance the removal of soluble pollutants, a micropool with a volume of half the WQDv is recommended near the basin outlet. The proposed site provides a stage-storage relationship for analysis.**Tasks:**Determine the following parameters:a. The WQDv for the basin.b. The volume and water surface elevation of the micropool.c. The water surface elevation of the WQDv.d. The size of the water quality outlet orifice.

Answered: Image /qna-images/answer/edaf7fea-6af9-4c3c-b408-f04201b1f98e.jpg

2. An extended detention basin is needed for a 40-acre watershed that is 42% impervious. The basin should be designed to accommodate a water quality design volume (wQD,) of 0.5 inch times the impervious area. The drawdown time for the basin is 30 hrs. A micropool with a volume of half the WQD, is recommended near the basin outlet to enhance the removal of soluble pollutants. The stage-storage relationship for the proposed site is given below. Determine the following: a. The WQD, for the basin b. The volume and water surface elevation of the micropool С. The water surface elevation of the WQD, d. The size of the water quality outlet orifice

2. An extended detention basin is needed for a 40-acre watershed that is 42% impervious. The basin should be designed to accommodate a water quality design volume (wQD,) of 0.5 inch times the impervious area. The drawdown time for the basin is 30 hrs. A micropool with a volume of half the WQD, is recommended near the basin outlet to enhance the removal of soluble pollutants. The stage-storage relationship for the proposed site is given below. Determine the following: a. The WQD, for the basin b. The volume and water surface elevation of the micropool С. The water surface elevation of the WQD, d. The size of the water quality outlet orifice

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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Question

Determine the following:

a.The WQDvfor the basin

b.The volume and water surface elevation of the micropool

c.The water surface elevation of the WQDv

d.The size of the water quality outletorifice

The image is a graph depicting the relationship between elevation and storage capacity.

**Graph Details:**

- **X-axis (Horizontal):** Represents elevation in feet (ft). The scale ranges from 30 ft to 33 ft, with markings at every 0.5 ft interval.
- **Y-axis (Vertical):** Represents storage capacity in cubic feet (ft³). The scale ranges from 0 to 100,000 ft³, with markings at every 10,000 ft³ interval.

**Curve Description:**

- The graph shows a curve that starts near the origin and rises steeply as the elevation increases. It illustrates a positive relationship between elevation and storage.
- At lower elevations (around 30 ft), the storage capacity is minimal. As the elevation increases beyond 31 ft, the storage capacity grows significantly, with a sharp increase noted especially beyond 32 ft.

This graph effectively demonstrates how storage capacity expands rapidly with slight increases in elevation, illustrating exponential growth.

**Extended Detention Basin Design for Impervious Watershed**

**Scenario:**

An extended detention basin is required for a watershed covering 40 acres, with 42% of the area being impervious surfaces. The design of the basin needs to incorporate a water quality design volume (WQDv) calculated as 0.5 inches multiplied by the impervious area. The drawdown time for the basin is specified to be 30 hours. To enhance the removal of soluble pollutants, a micropool with a volume of half the WQDv is recommended near the basin outlet. The proposed site provides a stage-storage relationship for analysis.

**Tasks:**

Determine the following parameters:

a. The WQDv for the basin.
b. The volume and water surface elevation of the micropool.
c. The water surface elevation of the WQDv.
d. The size of the water quality outlet orifice.

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