EPANET Tutorial 02.05 - Setting Object Properties | Hydraulic Modeling

Summary

In this tutorial, Mark Wilson, founder of a Q model, guides viewers through hydraulic modeling using EPANET software. He demonstrates adding labels, toggling their visibility, and correcting pipe IDs. Mark also shows how to modify attributes for pipes, nodes, and links, referencing the EPANET user's manual for accurate data entry. The video covers setting up a reservoir, junctions, and pipes with specific dimensions and roughness, as well as configuring a pump with a single-point curve. The aim is to inspire confidence in hydraulic modeling for new users, with advanced topics to be explored in future videos.

Takeaways

• 📚 The video is a tutorial by Mark Wilson, the founder of a Q model, focusing on hydraulic modeling with EPANET.
• 🏷 Mark demonstrates how to add and toggle labels in the EPANET user interface for better visualization.
• 🔄 He shows that it's easy to change IDs of the pipes in the model, a feature that is more user-friendly than some commercial products.
• 🛠 Mark uses the selector tool to change the attributes of each feature, such as pipe IDs, to align with the EPANET user guide.
• 📈 The tutorial covers changing various attributes like elevation, demand, and roughness for nodes and links in the model.
• 🔍 It's shown that one can access and edit element data by double-clicking on an element or using the edit button.
• 🌡 The importance of setting the correct units of measurement, in this case, feet, is highlighted for accuracy in the model.
• 💧 Mark explains how to set up a reservoir with a fixed boundary condition at a specific head level.
• 🚰 The process of entering data for pipes, junctions, and a reservoir is detailed, emphasizing the ease of data entry in EPANET.
• 🔧 The tutorial includes instructions on setting up a pump with a design point or single-point curve, using curve ID for reference.
• 📊 Mark illustrates how to create a pump curve by inputting data points, which EPANET uses to generate a curve based on a default equation.
• 🎥 The video concludes with an invitation to subscribe for more tutorials and mentions of upcoming advanced EPANET videos.

Q & A

Who is the speaker in the video tutorial?

The speaker in the video tutorial is Mark Wilson, the founder of a Q model.

What is the purpose of the tutorial?

The purpose of the tutorial is to provide a visual representation of the EPANET user's manual and help new users get started with hydraulic modeling.

What is the first step Mark Wilson demonstrates in the tutorial?

The first step Mark Wilson demonstrates is how to add labels to the map in the EPANET software.

How can users toggle the display of labels in the view options?

Users can toggle the display of labels on and off in the view options within the EPANET software.

What is the function of the Escape key when digitizing in EPANET?

The Escape key is used to cancel the digitizing process if the user decides not to finish it.

How can users change the IDs of pipes in EPANET?

Users can change the IDs of pipes by using the selector tool, double-clicking on the element, and entering a new ID.

What is the significance of the pipe IDs in the EPANET model?

The pipe IDs are important as they should match the IDs indicated in the EPANET drawing for the model to be accurate.

What is the default boundary condition for a reservoir in EPANET?

The default boundary condition for a reservoir in EPANET is a fixed head at the specified elevation unless a head pattern is given.

How does one change the attributes of a junction in EPANET?

To change the attributes of a junction in EPANET, one can double-click on the junction to bring up the editor and modify the elevation, demand, and base demand values.

What are the units of length used in the tutorial?

The units of length used in the tutorial are feet.

How does the speaker demonstrate changing the values of pipe attributes?

The speaker demonstrates changing the values of pipe attributes by accessing the editor for each pipe element and inputting the correct values for length, diameter, and roughness.

What is the purpose of the pump curve in EPANET?

The pump curve in EPANET defines the relationship between the flow rate and the head produced by the pump, which is essential for modeling the pump's performance.

How does one create a pump curve with a single data point in EPANET?

To create a pump curve with a single data point, one needs to go to the curve browser, create a new curve, and input the flow rate and head values. EPANET will use a default equation to generate the curve based on the single data point.

What are the initial, minimum, and maximum levels for the tank in the tutorial?

The initial level for the tank in the tutorial is set to 4, the minimum level is 0, and the maximum level is 20, all measured above the tank's base level.

How can users subscribe to the playlist for more tutorials?

Users can subscribe to the playlist by following the link provided in the video description or by finding the playlist on the platform where the video is hosted.

What advanced topics will be covered in future EPANET videos?

Advanced topics to be covered in future EPANET videos include modeling hydropneumatic tanks and other advanced hydraulic modeling techniques.

Outlines

00:00

🛠️ Hydraulic Modeling Tutorial Overview

Mark Wilson introduces himself as the founder of a Q model and begins a tutorial focused on hydraulic modeling using EPANET software. The tutorial aims to guide new users through the software by following exercises from the EPANET user's manual. Mark demonstrates how to add labels to the map, toggle their visibility, and correct mistakes in the pipe IDs, showcasing the ease of editing in EPANET compared to other commercial products. He also explains how to change attributes of different features, such as pipe ID, elevation, and demand, using the software's interface.

05:02

🔧 Configuring EPANET Model Components

Continuing the tutorial, Mark Wilson details the process of entering data for pipes, junctions, reservoirs, pumps, and tanks within the EPANET model. He emphasizes the importance of setting initial levels, minimum and maximum levels for tanks, and correctly configuring the pump using a single-point curve. Mark illustrates how to create a pump curve by entering data points and how EPANET interpolates values between these points. He concludes the video by encouraging viewers to subscribe for more tutorials and hints at upcoming advanced videos on the subject.

Keywords

💡EPANET

EPANET is a computer program that models the hydraulic and water quality behavior within pressurized pipe networks. It is widely used for water distribution system analysis and design. In the video, EPANET is the main software being demonstrated, and the tutorial focuses on how to use it for hydraulic modeling.

💡Hydraulic Modeling

Hydraulic modeling involves the use of computer programs to simulate the behavior of water flow and pressure in a network of pipes. It is essential for designing and analyzing water distribution systems. The video's theme revolves around teaching viewers how to perform hydraulic modeling using the EPANET software.

💡Tutorial

A tutorial is an instructional set of materials or a video that teaches a specific skill or concept. In this context, the video serves as a tutorial for new users of EPANET, guiding them through the software's user manual and exercises.

💡Labels

In the context of the video, labels refer to the textual annotations that can be added to a map or diagram within EPANET to identify elements such as pipes, nodes, and pumps. The script mentions adding labels for clarity and the ability to toggle their display on and off.

💡IDs

IDs in the script refer to the unique identifiers assigned to each element within the EPANET model, such as pipes, nodes, and pumps. Correctly assigning and changing IDs is crucial for accurate modeling, as demonstrated when the instructor corrects the pipe IDs according to the user guide.

💡Attributes

Attributes in the EPANET software define the characteristics of the elements in the model, such as length, diameter, and roughness for pipes, or elevation and demand for nodes. The video explains how to change these attributes to match the values specified in the user guide.

💡Reservoir

A reservoir in the context of hydraulic modeling is a fixed boundary condition that represents a source of water with a constant head. In the video, the instructor sets the elevation of a reservoir to 700, indicating its height above a reference point and its role as a boundary condition.

💡Junction

A junction in hydraulic models is a point where multiple pipes meet, and it typically has an elevation and a demand associated with it. The script describes setting the attributes of a junction, such as its elevation and demand, which are essential for simulating water flow.

💡Pump Curve

A pump curve represents the relationship between the flow rate and head (pressure) for a pump. It is crucial for accurately simulating the performance of pumps within a water distribution system. The video demonstrates how to enter data points for a pump curve in EPANET.

💡Tank

In the script, a tank is a storage element in the hydraulic model that has attributes such as initial level, minimum and maximum levels, and diameter. The tank's attributes are essential for simulating the storage and release of water within the system.

💡Units of Length

Units of length, such as feet or meters, are used to define the spatial dimensions of the model elements. The video specifies that the model is using feet as the unit of length, which is important for ensuring that all measurements within the model are consistent and accurate.

Highlights

Introduction by Mark Wilson, founder of a Q model, focusing on inspiring confidence in hydraulic modeling.

Tutorial is a continuation of previous ones, going through the EPANET user's manual with exercises.

Demonstration of adding labels to the map in the software.

Explanation of toggling label display on and off in view options.

Use of the Escape key to cancel ongoing digitizing tasks.

Correction of pipe IDs and showcasing the ease of modifying model attributes.

Tutorial on changing the attributes of each feature, such as pipe ID.

Instructions on adjusting node and link attributes according to the user guide.

Method of accessing element information through double-clicking.

Editing elevation and total head for a reservoir as a fixed boundary condition.

Setting units of length and other node attributes like demand and base demand.

Changing pipe attributes such as length, diameter, and roughness.

Alternative method of editing elements by single-clicking and using the edit button.

Entering data for pipes, junctions, and reservoirs in preparation for pump and tank setup.

Configuring the tank with initial level, minimum, and maximum levels, and diameter.

Setting up a pump using a design point or single-point curve.

Creating a pump curve with data points and the default EPANET equation.

Interpolation of values between multiple points on a pump curve.

Conclusion of the video with an invitation to subscribe for further tutorials and advanced EPANET videos.

Transcripts

hello folks my name is Mark Wilson and

I'm the founder of a Q model where we

inspire confidence in hydraulic modeling

this tutorial is a continuation of

previous tutorials we're going through

the EP annette user's manual and just

doing some of the exercises to give a

visual representation of the user's

manual and help new users get started

well let's get going one thing I didn't

do on the previous tutorial is do labels

okay if we click on the text or add

label button and then we click anywhere

in the map we can add a label then we

have to hit enter make a stick okay just

one thing that the user's guide doesn't

point out if you go back in here to view

options you can actually toggle the

display off and on

of those labels remember you can press

the Escape key if you start digitizing

something and then don't want to finish

one thing that we're going to do here

because I didn't have the map and the

users guide right in front of me while I

was digitizing the pipes is got them the

IDS a little bit wronged I just wanted

to show you that you can change those

and the model pretty readily this is

actually a little bit better easier

feature than some of the commercial

products where it's a little more

difficult to change IDs so I'm gonna go

ahead and use my selector tool I'm gonna

double click we're also talking in this

tutorial up changing the attributes of

each feature so this is the first

attribute we're going to change as pipe

ID I'm going to give this kind of a

dummy 12 ID just kind of as a

placeholder so then I can come over here

and change this one to a like it's

supposed to be on the drawing in EPA net

let's give this one the value of 24

right now and this one 30 then we can

start changing some of these other ones

think to this one seven this one is

supposed to be four okay now that we've

got all the pipes with the correct ID

according to the QuickStart user guide

we can go ahead and start changing some

of the other attributes I'm gonna refer

to page 14 and the users guide for the

table of values for nodes and links was

a starting in link 1 and we can access

the information in several different

ways

we can double click on an element this

brings up this little editor

the data we're changing here is the

elevation which is actually total head

for a reservoir so we're gonna give that

a 700 so this reservoir is a fixed

boundary condition so this if unless we

give it a head pattern it will always be

a boundary condition at 700 and then the

units of length in our case we're using

feet now go ahead and change node 2

which is a junction yeah it has an

elevation of 700 in a demand of 0 700

and a base demand of 0 so we'll leave

that and you get the picture I'll do the

rest of the nodes offline I'll just show

some links here number 1 is 3000 feet

long 14 inches diameter 14 inches

diameter and the roughness of 100 I

think we're all good to go on that one

and you can get the picture of how easy

it is to change values we'll just let me

show you one other thing here if you

single click on an element and then you

click the edit button it does the same

thing it brings up this little editor

window I'm going to go ahead and pause

the video right now while I finish up so

I've entered all the data for the pipes

and the junctions and the reservoir

now I'm going to go ahead and finish up

with doing the pump and the tank so

we're gonna give it an initial level of

4 and all these level initial minimum

and maximum are measured above the tank

base level so this elevation this is the

base level or you could consider at the

bottom of the tank that will have some

interesting ramifications when we try to

model hydropneumatic tanks has a tall

skinny tank or elevated story

and we'll cover that in a in the

advanced videos for now we'll just keep

working through this tutorial minimum

level we're gonna leave at zero maximum

level 20 and a diameter of 60 and again

we're in English units so that would be

in feet okay now for the pump we're

going to use a design point or single

point curve for this pump so all we

really need in here is the curve ID and

to create that curve what we have to do

is go over here into our browser

dude curve new and it kind of gives us a

starting ID here we can change this if

we want but since we named it in the

pump data as a curve ID one we're gonna

stick with that of course and this is a

pump curve and all we have to do is type

in our data points here 600 GPM at 150

feet of head now

when we only have a single point in here

it gives us a nice curve there based on

a default equation that's built into EP

Aneta if we were to add more points as

soon as we do that it's just gonna

and I do a point to point and then EPA

net will interpolate values between all

the different points so I could plug

zero flow here and we can do 200 and

that will there's a nice three-point

curve

several ways you can accomplish that

well that's all for this video I hope

you enjoyed that hope you subscribe to

the playlist to see their whole series

of these tutorials also and watch for ep

net advanced videos that I'll be posting

soon and good luck on your modeling