Waterloo Hydrogeologic - Analyzing a pumping test in AquiferTest

Summary

This tutorial video guides viewers through creating and analyzing a basic pumping test using OER Test software. It begins with setting up a new project, explaining the workflow, and entering essential data such as project details, well information, and pumping rates. The video then demonstrates how to input water level measurements and perform a T analysis, including both manual and automatic curve fitting. It concludes with interpreting the results, showcasing the software's capabilities for hydrogeological analysis.

Takeaways

• 😀 The video demonstrates how to create and analyze a basic pumping test using OER Test software.
• 🔍 The OER Test software is used for hydrogeological analysis, specifically for pumping tests.
• 📝 The workflow in OER Test involves entering data from leftmost to rightmost tabs: pumping test, discharge, water levels, and analysis.
• 💧 The pumping test tab is used to input basic project information and details about the wells involved in the test.
• 📊 The discharge tab allows users to enter data on the rates at which different pumping wells were pumped.
• 📈 The water levels tab is for entering water level measurements from both pumping and observational wells.
• 📋 The analysis tab is where users select the type of analysis, such as the Theis method, and fit it to a type curve.
• 📁 Users can create a map and export reports using additional tabs in OER Test, though these are not covered in the video.
• ⚙️ The video provides a step-by-step guide on how to input data into the OER Test software for a pumping test analysis.
• 📉 The analysis results, including transmissivity and storage coefficient, are displayed in the results pane for each well.
• 🛠️ OER Test offers both manual and automatic curve fitting options, with the latter using the ODAC fit button for convenience.

Q & A

What is the purpose of the video?

The purpose of the video is to demonstrate how to create and analyze a basic pumping test using OER Test software.

What is the first step in creating a new project in OER Test?

The first step in creating a new project in OER Test is to ensure that 'Create pumping test' is checked and then select the 'Create a new project' button.

What is the basic workflow in OER Test for analyzing a pumping test?

The basic workflow in OER Test involves starting from the leftmost tab and working towards the rightmost tabs, entering information and performing analyses step by step.

What are the four essential tabs used in the pumping test workflow?

The four essential tabs used in the pumping test workflow are the 'Pumping Test' tab, the 'Discharge' tab, the 'Water Levels' tab, and the 'Analysis' tab.

How does one add a new well in the pumping test tab?

To add a new well in the pumping test tab, one clicks the 'Click here to create a new well' button, which adds a well with the type automatically set to 'Observation well' by default.

What information is entered in the discharge tab?

In the discharge tab, one enters the pumping data for various pumping wells, including the rates at which different pumping wells were pumped at.

How can variable discharges be entered in OER Test?

Variable discharges can be entered in OER Test by selecting the 'variable' button and then filling out the table with the time and discharge rate for each pumping period.

What type of data is entered in the water levels tab?

In the water levels tab, one enters the water level observations for various wells, which can include drawdown data and static water level measurements.

What is the significance of the analysis tab in OER Test?

The analysis tab in OER Test is where one selects the type of analysis, fits it to a type curve, and can perform multiple analyses on a pumping test if desired.

How can one visualize the drawdown data in OER Test?

One can visualize the drawdown data in OER Test by selecting the well and checking the box to display the data. The graph can be changed to a log-log form for better visualization of the TI data.

What are the results displayed in the results pane of OER Test?

The results pane in OER Test displays the calculated best fit parameters such as transmissivity and storage coefficient, which are derived from the analysis of the pumping test data.

Outlines

00:00

💧 Introduction to Creating a Pumping Test in Oer Test

The video begins with a walkthrough of the Oer Test software for creating and analyzing a basic pumping test. The presenter navigates through the start screen, ensuring the 'Create Pumping Test' option is selected, and proceeds to create a new project. The video emphasizes the importance of understanding the workflow in Oer Test, which involves entering information from leftmost to rightmost tabs: Pumping Test, Discharge, Water Levels, and Analysis. The presenter explains that for a pumping test, one must input basic project details, unit specifications, and well information, including the pumping well's location and geometry. The video also touches on the option to save the project and the ability to specify well dimensions and properties, such as thickness, which affects the calculated transmissivity.

05:01

📊 Analyzing Pumping Test Data in Oer Test

In the second paragraph, the presenter moves on to the Discharge tab where pumping data for various wells is entered. The video demonstrates how to input constant discharge rates and mentions the capability to handle variable discharges. The presenter then transitions to the Water Levels tab, where observational data for wells is recorded. The video shows how to import time-drawdown data and set the reference system to time draw-down. The Analysis tab is introduced, where the presenter selects the Tice analytical method suitable for confined aquifers and fits the curve automatically using the ODAC fit button. The results, including transmissivity and storage coefficient, are displayed, and the presenter discusses options for visualizing the data, such as log-log plots. The video concludes by highlighting the software's additional functionalities beyond the scope of the tutorial, thanking viewers for their attention.

Keywords

💡Pumping Test

A pumping test is a method used to determine the characteristics of an aquifer such as its transmissivity and storage coefficient. In the video, the pumping test is the central activity being demonstrated, where the host guides viewers through the process of setting up and analyzing a test using OER Test software.

💡OER Test

OER Test is software used for analyzing groundwater flow and aquifer characteristics. It is the tool featured in the video that the host uses to create and analyze a basic pumping test. The script describes the user interface and workflow within OER Test to input data and perform analyses.

💡Discharge

Discharge in the context of a pumping test refers to the volume of water extracted from a well over a period of time. The script mentions entering discharge data, which includes the rates at which different pumping wells are pumped, indicating a crucial step in the pumping test analysis.

💡Water Levels

Water levels are measurements of the height of the water table in a well. In the video, the host explains how to input water level data, which is essential for understanding the drawdown effects during a pumping test and for subsequent analysis.

💡Analysis Tab

The analysis tab within OER Test is where the host selects the type of analysis to be performed on the pumping test data. It is a key part of the software's interface, allowing users to apply analytical methods like the Theis method to interpret the data.

💡Type Curve

A type curve is a pre-calculated curve that represents a theoretical solution to a groundwater flow problem. In the video, the host fits the pumping test data to a type curve to analyze the aquifer's properties, which is a common practice in hydrogeology.

💡Transmissivity

Transmissivity is a property of an aquifer that describes its ability to transmit water. It is calculated during the analysis of a pumping test and is one of the key outputs discussed in the video. The host mentions changing the thickness of the OER to affect the calculated transmissivity.

💡Storage Coefficient

The storage coefficient is a measure of the amount of water an aquifer releases from or stores in storage per unit volume due to a change in head. It is another important parameter derived from pumping test analysis, as highlighted in the video when the host discusses the results.

💡Observational Well

An observational well is a well used to monitor changes in water levels during a pumping test. The script describes adding an observational well to the OER Test project to record drawdown data, which is critical for analyzing the effects of pumping on the aquifer.

💡Drawdown

Drawdown refers to the decrease in water level in a well due to pumping. The video script includes instructions on how to input drawdown data, which is a standard practice for evaluating the impact of pumping on the water table.

💡Confined Aquifer

A confined aquifer is an aquifer that is under pressure, with impermeable layers above and below it. The host specifies that the aquifer in the demo is confined, which influences the choice of analytical methods and assumptions made during the pumping test analysis.

Highlights

Introduction to creating and analyzing a basic pumping test using OER Test software.

Starting a new project in OER Test and selecting the 'Create Pumping Test' option.

Saving the new project in a sensible location for future reference.

Overview of the basic workflow in OER Test for pumping test analysis.

Explanation of the four essential tabs used in the pumping test workflow: Pumping Test, Discharge, Water Levels, and Analysis.

Entering basic information for the pumping test, including project name, client, and location.

Specifying units for analysis, such as length units for coordinates and dimensions of the well.

Adding different wells and specifying their locations and geometries.

Entering discharge data for pumping wells at various rates.

Support for variable pumping rates and multiple pumping wells in OER Test.

Entering water level measurements for pumping and observational wells.

Selecting an analysis type and fitting it to a type curve in the Analysis tab.

Ability to perform multiple analyses on a single pumping test.

Entering the project name and units for the pumping test demo.

Setting the dimensions and time units for the pumping test.

Specifying the thickness of the OER and its effect on calculated transmissivity.

Adding a pumping well (PW1) and an observation well (OW1) with their respective coordinates.

Entering constant discharge data for the pumping well.

Importing time drawdown data for the observation well instead of manual entry.

Setting a static water level as a reference for the drawdown data.

Visualizing drawdown data and selecting the Tice analytical method for confined OERs.

Options for manual or automatic curve fitting using OER Test.

Viewing the results of the analysis, including transmissivity and storage coefficient.

Customizing graph visualization, such as log-log plots, for better data presentation.

Acknowledgment of OER Test's additional functionalities beyond the scope of the video.

Transcripts

hello and welcome in this video I'm

going to show you how to create and

analyze a basic pumping test using oer

test so I'm here on the start screen

this is a screen that pops up when you

first open up o for test and I'll make

sure that create pumping test is checked

and I'll create my new project by

selecting the create a new project

button right here and this will bring me

to a new blank project now for a real

project I would probably want to save

this somewhere sensible so I'd go to

file save ads and select a folder and

before I start going off and creating

this pumping test I think it's worth to

take a second to talk about the basic

workflow in oer test for analyzing the

pumping test so at the top of the screen

you'll notice that there's these

different tabs with names like pumping

test discharge water levels analysis

Etc in O for test we start by working at

the leftmost tab and working our way

rightwards entering in very information

towards the rightmost tabs in the

pumping test workflow the four essential

tabs that we'll be using are the pumping

test tab the discharge tab the water

levels Tab and the analysis tab you also

have these tabs for creating a map and

also exporting reports but these are

beyond the scope of this

video in this first tab the pumping test

tab you first just enter in the pumping

test information so this includes the

basic info like what the Project's name

is uh who the client is and what the

location is is you'll do things like

specify what the units are that you're

using for your analysis you'll do things

like add different Wells and specify

what their different locations and

geometries are once that's done you can

move on to the discharge tab so here

you'll enter in your discharge data so

you'll State at what rates different

pumping balls were pumped at note that

variable pumping rates and multiple

pumpkin Wells are supported within oord

test after that there's the water level

data tab

and here you'll enter in your different

water level measurements for your

various pumping and observational

Wells and finally you have the analysis

tab so here you can select a type of

analysis and fit it to a type curve and

in fact you can do multiple analyses on

a pumping test if you so

wish okay so we're back in the oer test

interface and we're starting off here on

the pumping test tab where we'll put in

the basic information for the pumping

test as well as the information about

the different Wells involved so for the

project name we'll just call this

pumping

test demo and I'll leave everything else

blank for the units the site plan

affects the length units that are used

for things like coordinates and on maps

so I'll change it to feet for the

dimensions this affects which units are

used for the dimensions of the well as

well as the thickness of the oer so I'll

change this to feet

time I'll change to minutes this is the

unit used on your discharge and water

level data for the discharge unit I'll

change this to gallons per minute and

for the transmissivity I'll change this

to square feet per

day for the information about the

pumping test itself I'll leave these on

the defaults and for the oord properties

I'll change the thickness to 48 ft this

will affect what our calculated

transmissivity is for the type this

doesn't affect any of our results

but just for my own records I'll specify

that this is a confined

oper now we can start putting in the

information for the different Wells so

of course for a pumping test you need at

least one pumping well and for the name

I'll just call it

pw1 for this analysis we're going to be

using the ti solution and as it turns

out in the ti solution the only well

geometry details that matter are the

distance from the observation well to

the popping well of course in a real

project it's recommended to put in as

much information here as you can so on

this table you have things like the x

coordinate the y-coordinate as well as

these different columns for different

parts of the well geometry things like

the screen radius the casing radius Etc

but again for time I'll omit those

because those won't affect the results

so for the pumping well I want to put it

on the origin so I'll say it's x

coordinate is zero and it's y coordinate

is zero and now I've filled out all the

information that I need do for the

popping well for this test we had an

observation well which is where we

measured our draw down data from so to

add it onto this table I'll select the

click here to create a new well button

which will add in the well by default

the type is automatically set to

Observation well and for its name I'll

say that it's called

ow1 now I know that this well was 824 ft

away from the pumping well and since I'm

not using real coordinates here I'll

just enter in its x coordinate as 824 ft

and this y-coordinate as 0t and I'll

leave everything else here blank so I'm

now ready to move on to the discharge

tab which I can do simply by selecting

the discharge tab at the top so in

discharge tab you enter in your pumping

data for your various pumping Wells you

select which pumping well you want to

put in data for in this table here at

the upper left as you can see currently

there's only one pumping well so it's

selects by default for this test there

is a constant discharge of 220 Gall per

minute so I'll just enter it in but note

that if I had variable discharges I

could also enter in that information

explicitly just by selecting this

variable button here and then filling

out this table starting with the time

that that pumping period ended and the

discharge rate for that pumping period

I'll put it back on a constant and now

I'll move on to the water levels

tab in the water levels tab I will put

in the water level observations for my

various Wells note that I can select

which well I'm putting in my

observational data for in this pane in

the upper left so I want to select ow1

here and for this observational data by

default the reference system used is

water level elevations however for my

data I just have draw down data so for

the reference system right here I'll

select it and select time draw down and

before I start entering in information

here I need to put in a static water

level so since this just data I can

simply use zero feet here and now I

could enter in this data manually but I

can also simply import it so I'll select

import data and I'll select my time draw

down

data and it's been brought into the O

for

test now I can move on to my

analysis so now at the analysis tab here

I can start off by displaying my draw

down data from my different Wells so

I'll select ow1 and check this box here

and now we can see that we've got time

draw down data being drawn here in this

box note that for any pumping test you

can actually have multiple analyses

associated with it so for this analysis

we'll just call it Ty

analysis and now to actually select that

I'm doing a t analysis on this I'll go

to the analysis method pane here in the

upper right and I'll find Tice so the ti

solution is an analytical method used

for confined oers there are also other

assumptions that you can review in the

documentation and now to fit this curve

I have several options I could fit it

manually using this show parameter

controls button then manually finding

some combination of

transmissivity and storage terms that

fit my data but I also have the ability

to automatically fit it this is done

using this odac fit button right here

check and select and I can see that the

curve is automatically fitted to

actually view the results these are

available in this results pane so one

results pane will exist for every well

which you are analyzing data from and

here we can see that the calculated best

fit had a transmissivity of about 1300

squ ft per day and a storage coefficient

of about 2 * 10 the -5 I can also change

how this graph is being visualized so

for example a common way to visualize TI

data would be in lock log form I can do

that by selecting this apply graph

settings button and selecting log log

changing the view and I also have all

these other options here to do things

like change how the different axes are

being presented change the actual size

of the diagram itself as well as symbols

on the diagram Etc just to make this

more presentable of course oer test has

many more functionalities and

capabilities but again this is just

supposed to be a quick video showing you

how to conduct the pumping test so thank

you for watching and I hope you learned

something