1) The document discusses groundwater flow to wells and pumping tests. It covers basic well hydraulics, assumptions of groundwater flow, and equations for confined, unconfined, and leaky aquifers.
2) The Theis and Jacob methods are presented for analyzing pumping test data from confined aquifers, while the Hantush and Walton methods are used for leaky aquifers.
3) Pumping tests are important to determine an aquifer's hydraulic properties and long-term well yield.
1. Ground Water Occurrence
2. Types of Aquifers
3. Aquifer Parameters
4. Darcy’s Law
5. Measurement of Coefficient of Permeability of Soil
6. Types of Wells
7. Well Construction
8. Well Development
Pumping Tests are conducted to examine the aquifer response, under controlled conditions, to the abstraction of water. Hydrogeologists determine the hydraulic characteristics of water-bearing formations, by conducting pumping tests. A pumping test is a practical, reliable method of estimating well performance, well yield, the zone of influence of the well and aquifer characteristics. There is a procedure for conducting pumping tests in wells. This lesson highlights the prevailing methods adopted while conducting pumping tests.
This is a lecture on well hydraulics. The basics of flow towards the well in confined and unconfined aquifers. Well interactions. Method of images. Flow nets in case of multiple wells. Superposition theory for multiple wells.
1. Ground Water Occurrence
2. Types of Aquifers
3. Aquifer Parameters
4. Darcy’s Law
5. Measurement of Coefficient of Permeability of Soil
6. Types of Wells
7. Well Construction
8. Well Development
Pumping Tests are conducted to examine the aquifer response, under controlled conditions, to the abstraction of water. Hydrogeologists determine the hydraulic characteristics of water-bearing formations, by conducting pumping tests. A pumping test is a practical, reliable method of estimating well performance, well yield, the zone of influence of the well and aquifer characteristics. There is a procedure for conducting pumping tests in wells. This lesson highlights the prevailing methods adopted while conducting pumping tests.
This is a lecture on well hydraulics. The basics of flow towards the well in confined and unconfined aquifers. Well interactions. Method of images. Flow nets in case of multiple wells. Superposition theory for multiple wells.
It includes the definition, properties, classification of groundwater with appropriate examples and figures in details. It also deals about the formation of groundwater. The properties of aquifers (all of 7) are described here in details with figures and mathematical terms.
The river Bharathapuzha is the lifeline of three districts in Central Kerala namely Palakkad, Malappuram and Thrissur and also parts of Coimbatore district of Tamil Nadu. This region gets an increase in population during the recent years. Water is unevenly distributed as surface and groundwater resources. An integrated hydrogeological study in the whole basin has not been attempted so far. This is the result of our investigation.
Sea Water Intrusion(SWI) in coastal areas :
1. Occurrence of seawater intrusion
2.Factors that affect coastal aquifer
3.Changes by hydrological regime
4.Problems due to SWI
5.Ghyben-Herzberg relation
6.Methods to detect SWI
7.Control measures
Reservoir Planning: Introduction; Investigations for reservoir planning; Selection of site for a reservoir; Zones of storage in a reservoir; Storage capacity and yield; Mass inflow curve and demand curve; Calculation of reservoir capacity for a specified yield from the mass inflow curve; Determination of safe yield from a reservoir of a given capacity; Sediment flow in streams; Life of reservoir; Reservoir sediment control; flood routing. Various types of Spillways and design.
It includes the definition, properties, classification of groundwater with appropriate examples and figures in details. It also deals about the formation of groundwater. The properties of aquifers (all of 7) are described here in details with figures and mathematical terms.
The river Bharathapuzha is the lifeline of three districts in Central Kerala namely Palakkad, Malappuram and Thrissur and also parts of Coimbatore district of Tamil Nadu. This region gets an increase in population during the recent years. Water is unevenly distributed as surface and groundwater resources. An integrated hydrogeological study in the whole basin has not been attempted so far. This is the result of our investigation.
Sea Water Intrusion(SWI) in coastal areas :
1. Occurrence of seawater intrusion
2.Factors that affect coastal aquifer
3.Changes by hydrological regime
4.Problems due to SWI
5.Ghyben-Herzberg relation
6.Methods to detect SWI
7.Control measures
Reservoir Planning: Introduction; Investigations for reservoir planning; Selection of site for a reservoir; Zones of storage in a reservoir; Storage capacity and yield; Mass inflow curve and demand curve; Calculation of reservoir capacity for a specified yield from the mass inflow curve; Determination of safe yield from a reservoir of a given capacity; Sediment flow in streams; Life of reservoir; Reservoir sediment control; flood routing. Various types of Spillways and design.
This slide show depicts how rainwater harvesting has been accommodated in policy and legislation in India and specifically in the state of Karnataka. It gives example of projects in rural areas and in the city of Bangalore.
What is fault?
Fault terminology
Fault plane:
Hanging wall
Foot wall
Slip and separation:
Separation
Classification of faults
Apparent movement as basis
Normal faults
Graben
Reverse faults:
Strike – slip faults
On the basis of altitude (dip and strike)
Mode of occurrences as basis
Parallel faults
Enechelon faults
Peripheral faults
Radial faults
On the basis of slip
Engineering consideration of faults
Analytical modelling of groundwater wells and well systems: how to get it r...Anton Nikulenkov
Aquifer tests are probably the most widely used methods to obtain hydrogeological properties that are vital for any mine dewatering or environmental impact assessments. Numerous softwares and methods currently exist that provide quick and easy tests interpretation by fitting theoretical and measured drawdown curves. However, misinterpreting a-priory groundwater concepts and not accounting correctly for such factors as skin-effect, well storage or partial penetration may result in hydraulic conductivity errors by several hundred precents. As illustrated by case studies from WA, both numerical and analytical models generally suffer from non-uniqueness that can be overcome by understanding a-priory groundwater concepts and implementing them appropriately into the interpretation algorithms.
The presentation also discusses an analytical approach for well systems design. The methodology is presently incorporated in ANSDIMAT software package that is developed by the Russian Academy of Sciences. The method uses standard and research analytical solutions and it is based on the principle of superposition. Unlike numerical models, the method allows calculating drawdowns inside a pumping well and regional drawdowns, for example, on an open pit contour. A particle tracking component, incorporated into the methodology, provides a practical alternative to numerical models for simplified environmental impact assessments.
Uniform Flow: Basic concepts of free surface flows,
velocity and pressure distribution,
Mass, energy and momentum principle for prismatic and non-prismatic channels,
Review of Uniform flow: Standard equations,
hydraulically efficient channel sections,
compound sections,
Energy-depth relations:
Concept of specific energy, specific force,
critical flow, critical depth,
hydraulic exponents, and
Channel transitions.
An open channel is a conduit in which a liquid flows with a free surface.
The free surface is actually an interface between the moving liquid and an overlying fluid medium and will have constant pressure.
In civil engineering applications; water is the most common liquid with air at atmospheric pressure as the overlying fluid.
The prime motivating force for open channel flow is gravity.
An open channel is a conduit in which a liquid flows with a free surface.
The free surface is actually an interface between the moving liquid and an overlying fluid medium and will have constant pressure.
In civil engineering applications; water is the most common liquid with air at atmospheric pressure as the overlying fluid.
The prime motivating force for open channel flow is gravity.
An open channel is a conduit in which a liquid flows with a free surface.
The free surface is actually an interface between the moving liquid and an overlying fluid medium and will have constant pressure.
In civil engineering applications; water is the most common liquid with air at atmospheric pressure as the overlying fluid.
The prime motivating force for open channel flow is gravity.
This study was competent studied earth dams and species and its history and the factors influencing them and the other part of a study of the most important risks that affect earth dams (seepage through earth dams) and how to calculate the leak and methods of their account and types the seepage and forms of cost and what are the ways process is treated with filters.
1. INTRODUCTION TO SEEPAGE THROGH EARTH DAM
2.METHODS CALCULATION SEEPAGE THROGH EARTH
DAM
3. ENTRANCE, DISCHARGE, AND TRANSFARE
CONDITIONSOF LINE OF SEEPAGE
4.SIMULATE THE PRESSURE ON THE EARTH DAM USING SAP 2000 PROGRAM
5.DESIGN FILTER TO CONTROLED THE SPAAGE IN EARTH DAM
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
2. INTRODUCTION :-
AW
ATER W
ELL IS A HOLE CREATED IN THE GROUND, BY
DIGGING, OR DRILLING
IN TO AN AQUIFER WITH A PIPE , A SCREEN
.AND PUMP TO PULL WATER OUT OF THE GROUND
3. W
ATER W
ELLS ARE USED FOR :
EXTRACTION OF GROUND WATER
CONTROL SALT WATER INTRUSION
REMOVE CONTAMINATED WATER
LOWER THE WATER TABLE FOR CONSTRUCTION PROJECT
RELIEVE PRESSURE UNDER THE DAMS
DRAIN FARM LAND
INJECT FLUID TO GROUND WATER
ARTIFICIALLY RECHARGE AQUIFER
5. HYDRAULIC OF W
ELLS : STATIC W
ATER LEVEL [SW (HO)
L]
IS THE EQUILIBRIUM W
ATER LEVEL BEFORE PUMPING
COMMENCES
PUMPING W
ATER LEVEL [PW (H)
L]
IS THE W
ATER LEVEL DURING PUMPING
DRAW
DOW (S = HO - H)
N
IS THE DIFFERENCE BETW
EEN SW AND PW
L
L
W
ELL YIELD (Q)
IS THE VOLUME OF W
ATER PUMPED PER UNIT TIME
SPECIFIC CAPACITY (Q/
S)
IS THE YIELD PER UNIT DRAW
DOW
N
6. BASIC ASSUMPTIONS
1. The aquifer is bounded on the bottom by a confining layer.
2. All geological formations are horizontal and of infinite horizontal extent.
3. The potentiometric surface of the aquifer is horizontal prior to the start
of the pumping.
4. The potentiometric surface of the aquifer is not changing with time prior
to the start of the pumping.
5. All changes in the position of the potentiometric surface are due to the
effect of the pumping well alone.
6. The aquifer is homogeneous and isotropic.
7. 7. All flow is radial toward the well.
8. Groundwater flow is horizontal.
9. Darcy’s law is valid.
10. Groundwater has a constant density and viscosity.
11. The pumping well and the observation wells are fully penetrating;
i.E., They are screened over the entire thickness of the aquifer.
12. The pumping well has an infinitesimal diameter and is 100%
efficient
8. Computing Drawdown Causing By A
pumping W
ell:
un steady radial flow:
the use of polar coordinates to describe the position of
appoint in aplane . it lies the distance r from the origin and
the angle between the polar axis and aline connecting the
point and the origin is
9. Two – dimensional flow in confined aquifer has
previously been derived as equation :
:THE RESULT IS EQUATION IN RADIAL COORDINATES
10. THE TW – DIMENSIONAL EQUATION FOR CONFINED FLOW , IF
O
THERE IS RECHARGE TO THE AQUIFER , IS GIVEN BY EQUATION :
CAN BE TRANSFOR
MED INTO R
ADIAL COOR
DINATES BECOMING
•
11. The First Mathematical Analysis Of A transient
Draw Down Effect On Confined Aquifer W
as
Published By C.V. Theis
14. The Integral In Equation Is Called The Exponential
Integral . It Can Be Approximated By An Infinite
Series So The Theis Equation Becomes :
Infinite Series Term Of Equation Has Been Called The W Function •
ell
( : And Is Generally Designated As W (U
15. THEIS EQUATION - EXAMPLE
Q = 1500 M3/
DAY, T = 600 M2/
DAY S= 4 X 10-4
FIND: DR DOW 1 KM FR
AW
N
OM W
ELL AFTER 1 YEAR
: ANSW
ER
Q
ho − h =
W (u)
4πT
( FIRSTLY FIND WELL FUNCTION U, THEN W(U
r 2 S (1000 m)2 (4x10−4 )
u=
=
= 4.6x10−4
4Tt 4(600m 2 /d)(365 d)
W (u ) = 7.12
FIND W(U) FROM APPENDIX 1
Q
1500m 3 / d
ho − h =
W (u ) =
* 7.12 = 1.42m
2
4πT
4π (600m / d )
16. THEIS EQUATION - EXAMPLE W
ELL
FUNCTION
u = 4.6x10−4
W (u) = 7.12
17. The Data Required For The Theis Solution Are :
1 Drawdown Vs. Time Data At An Observation Well,
2 Distance From The Pumping Well To The Observation Well,
3 Pumping Rate Of The Well.
18. The Non-equilibrium Reverse Type Curve (Theis
Curve) For A Fully Confined Aquifer
Theoretical Curve W(u) Versus 1/U Is Plotted On A Log-log Paper.
This Can Be Done Using Tabulated Values Of The Well Function
(See Appendix 1).
19. Field Data Plot On Logarithmic Paper For Theis
Curve-marching Technique :
The Field Measurements Are Similarly Plotted On A Log-log Plot With
(T) Along The X-axis and (Sw) along the Y-axis
20. MATCH OF FIELD DATA PLOT TO THEIS TYPE CURVE :
keeping the axes correctly aligned, superimposed the type curve on the
plot of the data (the data analysis is done by matching the observed
data to the type curve)
select any convenient point on the graph paper (a match point) and
read off the
coordinates of the point on both sets of axes. this gives coordinates
( 1/u, w(u)) and (t,sw) use the previous equations to determine t and s .
21. The log function lets us plot this as a straight line on semilog paper
Jacob method of solution of pumping-test data for a fully confined
aquifer. Drawdown is plotted as a function of time on semi-logarithmic
paper
22. Thiem equation for steady radial flow in confide
: aquifer
• In the case of steady radial flow in a confide aquifer , the following
assumptions are necessary :• 1- the aquifer is confide top and bottom
• 2- the well is pumped at a constant rate
• Equillibrium has been reached that is , there is no farther change in draw
down with time.
• T= kb = Q/ 2 Π (σ1−σ2 ) ∗ λν ( ρ2/ρ1)
• η0−η = θ / 2 π τ ∗ λν ( ρ2/ρ1)
23. FLOW IN A LEAKY, CONFIDE AQUIFER :
FLOW EQUATION :
Most Confide Aquifers Are Not Totally Isolated From Sources Of
Vertical Recharge . Aquitards , rather Above Or Below The Aquifer ,
Can Leak Water Into The Aquifer If The Direction Of The Hydraulic
Gradient Is Favorable :-
29. Unsteady radial flow in an unconfined aquifer
(non-equilibrium radial flow)
• The flow of water in an unconfined aquifer toward a pumping well is described by the
following
Equation (neuman & witherspoon 1969)
30. Neumann's solution assumes the following, in addition to
the basic assumptions:
Flow description :
Initial flow : the Theis – like ( horizontal ) from release of compression ,
specific storage component
Intermediate flow :
has gravity drainage component ( both horizontal & vertical flow )
Late – time flow :
becomes horizontal again from specific yield components
31. Type curves of drawdown versus time illustrating the effect of delayed
yield for pumping tests in unconfined aquifers.
38. DESIGN OF PUMPING TESTS :
PARAMETERS :
. Test well location, depth, capacity (unless existing well used).
. Observation well number, location, depth.
. Pump regime
GENERAL GUIDANCE:
• CONFINED AQUIFERS:
• Transmissivity more important than storativity: observation wells not
always needed (although accuracy lost without them!).
• Unconfined aquifers: storativity much larger, and has influence over
transmissivity estimates: observation wells important as is larger
test duration. Care needed if aquifer only partly screened
39. THE IMPORTANCE OF PUMPING TESTS
* Pumping tests are carried out to determine:
1- how much groundwater can be extracted from a well based on longterm yield, and well efficiency?
2 - the hydraulic properties of an aquifer or aquifers.
3 - spatial effects of pumping on the aquifer.
4 - determine the suitable depth of pump.
5- information on water quality and its variability with time.