Modelling pollutants

00:06

Info

00:06

works.

00:06

WS pro is capable of modeling concentrations

00:09

of dissolved substances traveling through a network.

00:13

This includes pollutants such as nitrates

00:17

modeling,

00:18

unwanted pollution is slightly different from modeling something like chlorine

00:22

because the goal is to eliminate pollutants rather

00:25

than maintain levels for a specific period.

00:28

First, open the bridge net network and create a new scenario

00:35

name the new scenario X two

00:38

do not copy any existing scenarios but make

00:40

sure to create a matching scenario in the control

00:45

zoom into the lower left area of the network. To find the fixed head sources.

00:50

For this exercise.

00:51

You will simulate a borehole pollution incident at the

00:54

lower fixed head control unit which supplies the reservoir.

00:57

And in turn the network

00:60

in this model, the upper fixed head control unit is not running.

01:03

So you will work on the lower one,

01:06

double click,

01:07

the fixed head control with the ID number 548102 to open its properties,

01:14

expand water quality and click the button with

01:16

the ellipsis next to water quality concentration.

01:21

A dialogue opens where you can edit the

01:23

date time and concentration of the pollution incident.

01:28

Open the calendar drop down in the first row of the date, time column

01:32

and set a start date and time to 2nd May 2022 at midnight.

01:37

A concentration of zero will be set by default

01:41

in the next row, set the same date. But adjust the time to two o'clock or 020000

01:50

in the same row set, the concentration to 100

01:55

in the third row, set the date and time to 2nd May 2022 at six o'clock

02:02

leave the concentration set to zero.

02:05

Note that when you adjust the date and time in this dialogue,

02:08

the highlighted start date is the control date.

02:11

Do not change the start date to the current date

02:14

as the model is not set up to use any other dates as a reference point.

02:19

Click. OK.

02:21

Before continuing, commit the changes you have just made to the server

02:27

next, create a new sou

02:29

data object,

02:34

name it nitrate

02:35

and then click, OK,

02:37

double click the new nitrate solute

02:39

data object to open a dialogue where you can edit its properties

02:45

in the basic water quality tab,

02:47

click the box next to conservative substance and then close the dialogue

02:53

next. Create a new run and name it. Nitrates

03:04

click and drag the bridge net and its associated control

03:07

and demand diagram to the respective areas in the schedule,

03:10

hydraulic run dialogue,

03:14

adjust the end time of the simulation to nine May 2022 at midnight

03:20

in the scenarios. Tab ensure that only E X two is active

03:25

in the run type group box. Expand the dropdown and select water quality

03:32

with the water quality options.

03:34

Dialog,

03:34

open click and drag the nitrate solute data object into the solute data area.

03:41

Click. OK, to close the dialogue

03:44

in the schedule. Hydraulic run dialogue, click run

03:49

in the model group window.

03:50

The run results appear under the nitrates run.

Video transcript

00:06

Info

00:06

works.

00:06

WS pro is capable of modeling concentrations

00:09

of dissolved substances traveling through a network.

00:13

This includes pollutants such as nitrates

00:17

modeling,

00:18

unwanted pollution is slightly different from modeling something like chlorine

00:22

because the goal is to eliminate pollutants rather

00:25

than maintain levels for a specific period.

00:28

First, open the bridge net network and create a new scenario

00:35

name the new scenario X two

00:38

do not copy any existing scenarios but make

00:40

sure to create a matching scenario in the control

00:45

zoom into the lower left area of the network. To find the fixed head sources.

00:50

For this exercise.

00:51

You will simulate a borehole pollution incident at the

00:54

lower fixed head control unit which supplies the reservoir.

00:57

And in turn the network

00:60

in this model, the upper fixed head control unit is not running.

01:03

So you will work on the lower one,

01:06

double click,

01:07

the fixed head control with the ID number 548102 to open its properties,

01:14

expand water quality and click the button with

01:16

the ellipsis next to water quality concentration.

01:21

A dialogue opens where you can edit the

01:23

date time and concentration of the pollution incident.

01:28

Open the calendar drop down in the first row of the date, time column

01:32

and set a start date and time to 2nd May 2022 at midnight.

01:37

A concentration of zero will be set by default

01:41

in the next row, set the same date. But adjust the time to two o'clock or 020000

01:50

in the same row set, the concentration to 100

01:55

in the third row, set the date and time to 2nd May 2022 at six o'clock

02:02

leave the concentration set to zero.

02:05

Note that when you adjust the date and time in this dialogue,

02:08

the highlighted start date is the control date.

02:11

Do not change the start date to the current date

02:14

as the model is not set up to use any other dates as a reference point.

02:19

Click. OK.

02:21

Before continuing, commit the changes you have just made to the server

02:27

next, create a new sou

02:29

data object,

02:34

name it nitrate

02:35

and then click, OK,

02:37

double click the new nitrate solute

02:39

data object to open a dialogue where you can edit its properties

02:45

in the basic water quality tab,

02:47

click the box next to conservative substance and then close the dialogue

02:53

next. Create a new run and name it. Nitrates

03:04

click and drag the bridge net and its associated control

03:07

and demand diagram to the respective areas in the schedule,

03:10

hydraulic run dialogue,

03:14

adjust the end time of the simulation to nine May 2022 at midnight

03:20

in the scenarios. Tab ensure that only E X two is active

03:25

in the run type group box. Expand the dropdown and select water quality

03:32

with the water quality options.

03:34

Dialog,

03:34

open click and drag the nitrate solute data object into the solute data area.

03:41

Click. OK, to close the dialogue

03:44

in the schedule. Hydraulic run dialogue, click run

03:49

in the model group window.

03:50

The run results appear under the nitrates run.

Video quiz

How is modelling the concentrations of pollutants different from those of modelling dissolved substances?

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Step-by-step Guide

InfoWorks WS Pro is capable of modeling concentrations of dissolved substances travelling through a network. Examples includes pollutants such as nitrates.

The goal of modelling unwanted pollution is to eliminate pollutants.

  1. Open the BridgeNet network.
  2. In the Scenarios toolbar, click Create scenario.
  3. In the Create New Scenario dialog box, enter the name “Ex2”.
  4. Select Create matching scenario in the Control.
  5. Click OK.

The InfoWorks WS Pro interface, Scenarios toolbar with Create Scenario selected, and the Create New Scenarios dialog box with options selected for the “Ex2” scenario.

  1. Zoom into the lower-left area of the network to find the fixed head sources.

For this exercise, you will simulate a borehole pollution incident at the lower fixed head control unit, which supplies the reservoir and, in turn, the network. In this model, the upper fixed head control unit is not running, so you will work on the lower one.

  1. Double-click the fixed head control with ID number 548102.
  2. In the Properties panel, expand Water Quality.
  3. In the Water Quality Concentration cell, click the More () button.

In the Properties panel, Water Quality Concentration cell, the More (…) button called out; and the GeoPlan zoomed into the selected fixed head, highlighted in red.

To edit the date, time, and concentration of the pollution incident:

  1. In the Fixed Head profile graph window, Under Date Time, expand the drop-down and set the date to February 5, 2022 in the proper date format for your region.
  2. Leave the time set to 00:00:00.
  3. Leave the Concentration set to 0.
  4. In the second row, set the same date.
  5. Adjust the time to 02:00:00.
  6. Set the Concentration to 100.
  7. In the third row, set the same date.
  8. Adjust the time to 18:00:00.
  9. Leave the Concentration set to 0.

Note: Do not change the start date to the current date, as the model is not set up to use any other dates as a reference point.

  1. Click OK.

The profile graph window with three dates, times and concentrations (mg/l) for the pollution incident entered and highlighted in red, and OK selected.

  1. Commit the changes to the server.

Next, create a new solute data object:

  1. Right-click Solute Data Group and select New > Solute Data.
  2. In the New Name – Solute Data dialog box, enter the name “Nitrate”.
  3. Click OK.

The New Name -Solute Data dialog box with the name “Nitrate“ entered and OK selected.

  1. In the Model Group window, under Solute Data Group, double-click Nitrate.
  2. In the Solute Data – Nitrate window, Basic Water Quality tab, select Conservative Substance.
  3. Click Save.

The Solute Date – Nitrate window, Basic Water Quality tab, with Conservative Substance enabled and highlighted in red, and Save selected.

  1. Close the window.

Now, create a new run:

  1. In the Model Group window, right click Run Group and select New > Run.
  2. In the Schedule Hydraulic Run dialog box, in the Title field, enter the name “Nitrates”.
  3. From the Model Group window, drag the BridgeNet network into the Schedule Hydraulic Run dialog box, and drop it into the Network group box.

The Control and Demand Diagram automatically populate.

  1. Enable Experimental.
  2. Under Run Parameters, set the End time to May 9, 2022.
  3. Leave the time set to 00:00:00.
  4. In the Scenarios tab, ensure that only Ex2 is enabled.
  5. In the Run Type group box, expand the drop-down and select Water Quality.

The Schedule Hydraulic Run dialog box with options selected and set for the Nitrates run, and in the Run Type drop-down, Water Quality selected.

  1. From the Model Group window, drag the Nitrate solute data object into the Water Quality Options dialog box, and drop it in the Solute Data group box.
  2. Click OK.

The Water Quality Options dialog box with Nitrate in the Solute Data group box and OK selected.

  1. In the Schedule Hydraulic Run dialog box, click Save.
  2. Click Run.

In the Model Group window, the run results appear under the Nitrates run.

The Model Group window with Run Group and Nitrates expanded to show the new run.

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