Stichting Steunfonds Kyoga - SamSamWater · Borehole completion report for 2 boreholes ... TGS 201328 Borehole Drilling and Water Supplies ... Stichting Steunfonds Kyoga Borehole

Stichting Steunfonds Kyoga

Borehole completion report for 2 boreholes at Wiggins primary school, Kumi town

council, Kumi district

BOREHOLE COMPLETION REPORT

November 2013

TGS 201328

Borehole Drilling and Water Supplies Osman Road, plot 12, Lira Municipality- Chwa II road, plot 40, Mbuya

P.O.Box 37461, Kampala-Uganda

0772-222049/10, 0312-265130

E-mail:[email protected]

Aq

uif

er

typ

e

WS

L (

m

bg

l)

Yie

ld

(l/h

r)

Desig

n

Dep

th (

m

bg

l) Details /

Remarks

Sanitary seal

5'' plain casings

Back f ill material

13.69 End of 10" hole

18.70 End of 6½'' hole

20.67 End of 6'' hole

Cement grout

F 24.00 746

F 24.75 246

1,000

24 m 40.71 End of 4½'' holeMain w ater

strike:

Yield

Stichting Steunfonds Kyoga

Borehole completion report for 2 boreholes at Wiggins primary school, Kumi town

council, Kumi district

Prepared by: OMO

Quality Control: VBA

BOREHOLE COMPLETION REPORT

November 2013

TGS 201328

Borehole Drilling and Water Supplies Osman Road, plot 12, Lira Municipality- Chwa II road, plot 40 Mbuya

P.O.Box 37461, Kampala-Uganda

0772-222049/10, 0312-265130

E-mail: [email protected]

TABLE OF CONTENTS

TABLE OF CONTENTS ..................................................................................... III

LIST OF ACRIMONY ........................................................................................ II

1 INTRODUCTION ............................................................................................1

2 STAFF AND EQUIPMENT DEPLOYED .................................................................1 2.1 Staff Drilling Contractor ............................................................................1 2.2 Equipment and Drilling methods used ........................................................2

3 LOGISTICS AND COMMUNICATION .................................................................2

4 RESULTS OF THE DRILLING PROGRAMME ........................................................2 4.1 Drilling ...................................................................................................2 4.2 Test Pumping Results ...............................................................................3 4.3 Water Quality Analysis Reports .................................................................3 4.4 Platform Construction ..............................................................................4 4.5 Hand pump Installation ............................................................................4

5 CONCLUSION AND RECOMMENDATIONS ..........................................................4 5.1 General Conclusion and discussions ...........................................................4 5.2 Recommendations ...................................................................................5

List of Annexes Annex 1 Results of the drilling programme................................................................ 6

Annex 2 Test pumping results ................................................................................. 7

Annex 3 Water quality analysis results ..................................................................... 8

Annex 4 Hand pump installation certificates .............................................................. 9

List of Tables Table 1 Location of boreholes in Wiggins Primary School Boundaries ............................ 1

Table 2 Staff deployed ........................................................................................... 2

Table 3 Summary of drilling results .......................................................................... 3

Table 4 Summary of test pumping results ................................................................. 3

TGS Water Ltd – Report: 201328 SSK-Wiggins P/s Kumi

Borehole Completion report, SSK in Kumi district, Uganda

ii

LIST OF ACRIMONY

Acronym Description

" Inches

DD Drilled depth

DTB Depth to Bedrock

DTH Down the hole

DWD Directorate of Water Development of Ministry of Water and Environment

DWL Dynamic Water Level

DWR Depth to Weathered Rock

l/hr Liters per hour

M meters

M bgl Meters below ground level

MWS Main Water Strike Levels

PAT Promotion of Appropriate Technology

PIP Pump installation depth

PS Primary School

Psi Pounds per square inch

Qair Air lift yield or Drillers yield estimate at end of drilling

Qtest Tested yield during well test

SWL Static Water Level

TGS The Good Shepherd

UTM X,Y Universal Transverse Mercator for X axis and Y axis

WSL1,2,3 Water Strike Levels 1, 2, 3, etc

SSK Stichting Steunfonds Kyoga



1

1 Introduction TGS Water Ltd was commissioned by Stiching Steunfonds Kyoga (SSK), a Non-

Governmental Organisation (NGO) to carry out drilling, test pumping and casting of

platforms for a maximum of two (02) boreholes at Wiggins primary school, Kumi town

council, Kumi District. The geophysical borehole site investigations were done by WE

Consult and the results were presented in a WE Consult report 201328. Siting was done

at various points in the school; in the end, two points were successfully drilled and

installed with hand pumps and are serving the school. The contractual arrangement was

such that if the first drilling attempt yielded more than 1,000 litres per hour, then only

one borehole would be drilled. However, if the first drilling attempt yielded less than

1,000 litres per hour, a second borehole would be drilled. The first drilling attempt

yielded 400 litres per hour, prompting the contractor to drill a 2nd attempt which

fortunately yielded just the minimum of 1,000 litres per hour. This in the end translated

to the client having 2 boreholes, as it was later agreed that that both wells be installed

with hand pumps.

The contractor carried out the drilling, design installation and well development between

11th and 23rd October 2013. Test pumping and platform casting was done on two

separate occasions for the two boreholes; long duration test pump of 4 steps and 12

hour constant test on the 2nd borehole DWD 41415 was done between 23rd and 24th

October 2013, while short constant rate test on the 1st borehole DWD 47551 was done on

31st October 2013. On discussion with the client, both wells were considered for

installation of a hand pump. Although both wells did not post excellent yields, they all

have water able to sustain a hand pump. Moreover, in this area, available data did not

indicate high chances of achieving better higher yielding boreholes.

Table 1 Location of boreholes in Wiggins Primary School Boundaries

2 Staff and Equipment Deployed

2.1 Staff Drilling Contractor

TGS Water Ltd deployed Mr Byarugaba Vincent Akiiki, as the technical manager of the

project. Vincent was assisted by Mr. Opuru Moses to manage day to day operations of

the project.

The logistics of the field drilling crew were handled by Mr Okuma David. Well logging was

done by Mr Shaban Onweng, while the rig was operated by Mr Okello Moses, assisted by

Mr Okwil Tony. Test pumping, platform construction and hand pump installation were

carried out under supervision of Mr. Okuma David assisted by Mr. Obua Boniface and

Anyii Elvis as indicated in Table 2.

S.N

DWD

No. UTMx UTMy Source name

Drill Date

start

Drill date

end DD

Qair

(l/hr)

DTBR

(m)

DTWR

(m)

MWS

(mbgl)

WSL1

(mbgl)

WSL2

(mbgl)

1 47551 603608 164246 Wiggins P/S-01 10/11/2013 10/15/2013 51.68 220 16.61 10.99 18 11 18

2 41415 603528 164161 Wiggins P/S-02 10/16/2013 10/21/2013 40.71 1,000 14.71 12.31 24 24 25

Avarage of Parameters 46.2 610 15.66 11.65 21 17 21 S/N: Serial Number, DWD No.: Directorate of Water Dev elopment Number f or deep wells, UTM X, Y: Univ ersal Transv erse Marcator f or X axis and Y axis, DD: Drilled Depth, Qair: Air lif t y ield, DTBR: Depth To Bed Rock, DTWR: Depth To Weathered Rock, m: Meters, MWS-Main Water Strike lev el, WSL1,2,3 -Water Strike Lev el 1,2,3



2

Table 2 Staff deployed

Name Position Task Assignment

Byarugaba Vincent

Akiiki

General & Technical

Manager

Coordinate all the operations and providing

technical support to the field teams,

quality assurance and final reporting.

Opuru Ojulo Moses Operations Manager Coordinate with team leaders, logistics and

drafting final report.

Okuma David Field logistics

manager

Writing borehole logs and keeping daily

records, logistics, & representing

contractor on site

Onweng Shaban Field well logging Writing well logs in the field

Okello Moses Driller Responsible for machine operation

Okwir Tony Ass Driller Assists in machine operation/drilling

Obua Boniface Test pumping,

casting and

installation crew

Assisting in Test pumping, casting and

Installation

Anyii Elvis Test pumping,

casting and

installation crew

Assisting in Test pumping, casting

2.2 Equipment and Drilling methods used

TGS Water Ltd deployed PAT 401 drilling rig with a mast of 3 m long to drill the 2

boreholes.

Air and mud rotary drilling methods were used to drill the boreholes with the help of an

ELGI 450cfm, 150 Psi capacity compressor and the mud pump. The same compressor

was used to carry out well development. The rig was equipped with drag bits, DTH

hammers, and button bits of different sizes. The drill rods used were 3” in diameter and

average lengths of 2m. Drilling in the overburden was achieved using a 10” and an 8”

drag bit. Drilling was accomplished by use of either 6.5” button bit reamer or 4.5” drill bit

in the hard rock. In highly collapsing overburden formation, the mud rotary drilling

method was adapted using a mud pump mounted on the PAT drilling rig, while in other

cases, temporary casings were used to enable clean drilling below the collapsing

formation.

3 Logistics and Communication The drilling team lodged in Kumi town council, which is very near to the site. This

ensured that work commenced very early. Contact between the field and office was

through mobile telephones using the MTN, UTL, WARID and Airtel networks, whereas

contact between the contractor and the client was through e-mails and phone calls.

4 Results of the drilling programme

4.1 Drilling

The drilling team mobilized the drilling equipment and materials on 10th October 2013

and drilling commenced the next day and ended on 23rd October 2013. Table 3 presents

the summary of the drilling program.



3

Table 3 Summary of drilling results

From table 3, the average drilled depth is 46.2 m bgl while the average drillers’ yield is

610 l/hr. The average depth to bedrock is 15.66 m bgl and the average depth to

weathered rock is 11.65 m. The average main water strike for the 2 boreholes is 20.81

m. Wiggins P/S-01(DWD 47551) borehole was low yielding, with an airlift yield of 220

l/hr, after well development the yield enormously increased to even sustain test pumping

yield of 500 l/hr. Wiggins P/S-02 (DWD 41415) borehole had a higher yield of 1,000 l/hr.

4.2 Test Pumping Results

For this particular project, the main objective of test pumping was to determine the safe

yield and optimum installation depth of the pump (hand pump or motorized pump).

Four to five step tests (4 hours for 4 steps and 16 minutes for the 5th step) followed by

recovery monitoring before a 12 hour constant rate test were carried for Wiggins P/S-02

borehole, while Wiggins P/S-01 was test pumped for a short constant rate test of 3

hours. Both tests were followed by recovery monitoring till a minimum of 90% of the

created drawdown was recovered. At the end of test-pumping, a water sample was

collected and taken to the laboratory of National Water and Sewerage Corporation

(NWSC), Bugolobi, Kampala, for Physical-chemical quality analysis. The data collected

from test pumping has been analysed and is presented in Annex 2, while a summary is

presented in Table 4.

Table 4 Summary of test pumping results

The average static water level (SWL) is 6.44 m bmp, while the average dynamic water

level (DWL) of combined 16 hours and 3 hours of pumping was 35.13 m bgl. The

recovery of the low yielding well is lower than the other borehole

The analysed results of test pumping are given in details in Annex 2.

4.3 Water Quality Analysis Reports

One of the main objectives of any water supply project is to provide the community with

water of a good quality, which should be colourless, odourless and pleasant to taste. At

the end of the test-pumping, a water sample was collected by the contractor for analysis

of physio-chemical parameters for the water of each of the 2 boreholes. Water quality

analysis was done at National Water and Sewerage Corporation, Bugolobi, Kampala. The

results of the water quality analysis are presented in Annex 3

S.N

DWD

No. UTMx UTMy Source name

Drill Date

start

Drill date

end DD

Qair

(l/hr)

DTBR

(m)

DTWR

(m)

MWS

(mbgl)

WSL1

(mbgl)

WSL2

(mbgl)

1 47551 603608 164246 Wiggins P/S-01 10/11/2013 10/15/2013 51.68 220 16.61 10.99 18 11 18

2 41415 603528 164161 Wiggins P/S-02 10/16/2013 10/21/2013 40.71 1,000 14.71 12.31 24 24 25

Avarage of Parameters 46.2 610 15.66 11.65 21 17 21 S/N: Serial Number, DWD No.: Directorate of Water Dev elopment Number f or deep wells, UTM X, Y: Univ ersal Transv erse Marcator f or X axis and Y axis, DD: Drilled Depth, Qair: Air lif t y ield, DTBR: Depth To Bed Rock, DTWR: Depth To Weathered Rock, m: Meters, MWS-Main Water Strike lev el, WSL1,2,3 -Water Strike Lev el 1,2,3

SN DWD No. UTMx UTMy Source name Tet pump

date

Constant

pumping

time (hrs)

SWL (m

bmp)

DWL (m

bmp)

%age

Recovery

Recovery

Time

(minutes)

1 47551 603608 164246 Wiggins P/S-01 31/10/2013 3 6.40 37.00 82% 70

2 41415 603528 164161 Wiggins P/S-02 23/10/2013 12 6.48 33.25 93% 60

Avarage recorded parameters 7.5 6.44 35.13 88% 65

S/N: Serial Number, DWD No.: Directorate of Water Dev elopment Identif ication number, l/hr: Litre per hour, Q test: Yield during testpumping, SWL: Static Water Lev el, DWL: Dy namic Water Lev el, hrs: Hours, m bmp: meters below measuring point.



4

From the analysed samples, it’s indicative that all the samples showed satisfactory

physio-chemical characteristics, although apparent colour and total suspended solids

were slightly higher than national permissible standards for potable water. These two

parameters are however not disease causing but may have some impact on source

acceptability. The contractor suspects that, the apparent colour are a characteristic of the

water bearing rocks in the area rather than a construction problem as all efforts were

made to ensure proper well construction was achieved. According to the water quality

analysis certificates, the water is fit for both domestic and livestock usage.

4.4 Platform Construction

After successfully drilling and test pumping the boreholes, a concrete platform was cast

with a platform ring of 1.6m diameter and a drainage channel of 6m long. Platform

construction of the 1st borehole DWD 47551 was done later on 31st October 2013, due to

a delayed decision making from the client on whether this borehole would be installed or

be left as a monitoring borehole as had been suggested by the contractor since it was a

low yielding borehole. Table 4 presents a summary of a schedule for platform

construction.

Table 4 Summary of Casting and installation results

4.5 Hand pump Installation

The boreholes were installed at a minimum depth of 24 m for Wiggins P/S-02 and a

maximum depth of 42 m bgl for Wiggins P/S-01. Averagely the hand pump installation

depth was 33 m.

Both boreholes were installed with UII Indian Mark hand pumps of AJAY MAKE. The client

plans to monitor the working of the wells as fundraising for a solar pumped system is

done, based on Wiggins P/S-02 borehole.

5 Conclusion and Recommendations

5.1 General Conclusion and discussions

The project had technical and project success rates of 100 %. TGS Water ltd defines a

100% project success as one where the whole target of the client has been achieved,

irrespective of how many drilling attempts or how much it cost the client. We also

consider a 100% technical success rate for a project when all the drilling attempts made

have a yield acceptable for a hand pump. In Uganda, 500 litres per hour is the national

acceptable minimum yield for a borehole to be installed with a hand pump. However,

there are even individual districts that have lowered this threshold to 300 litres per hour

due to an extreme low ground water potential in such specific areas within districts. In

this particular project, all the two boreholes drilled have a sustainable yield equal to or

above 500 litres per hour, translating to a technical & project success rate of 100%.

Water Quality analyses’ results for the two successful villages indicate that, although the

apparent colour and total suspended solids are slightly higher than the maximum

SN DWD No. UTMx UTMy Source name Cast date Install date PID

1 47551 603608 164246 Wiggins P/S-01 10/31/2013 11/1/2013 42

2 41415 603528 164161 Wiggins P/S-02 10/24/2013 10/25/2013 24

Avarage recorded parameters 33S/N: Serial Number, l/hr: Litre per hour, Q test: Yield during testpumping, PID-Pump Installation Depth



5

permissible limits for potable water in Uganda, in general, the water was fit for domestic

and livestock consumption.

5.2 Recommendations

1. Based on analysis of test pumping data, it was recommended to install the hand

pump in Borehole 1 at 42 and borehole 2 at 24 m below ground level respectively.

2. In future, an electric pump of 1,000 liters per hour operating at a maximum of 10

hours a day can be installed at 30m below ground level in DWD 41415.

3. TGS to re-sample and re-analyse the water quality.



6

Annex 1 Results of the drilling programme

Borehole completion data Drilling Contract No.:

DWD 47551 Wiggins PSFinal Depth (m) 51.68 District Kumi Altitude 1162 m amslAirlift yield (m3/hr) 0.22 Sub-County Kumi Town Council GPS E 164246 UTM GridSWL (m bgl) 10.99 Parish Tank Ward GPS N 603608 36NDate started 11/10/2013 Date completed 15/10/2013 401 VES

Dri

ll p

ipe

Dep

th (

m b

gl)

Pen

etra

tio

n

tim

e (

min

)

Aq

uif

er t

ype

WS

L (

m b

gl)

Yie

ld (

l/h

r)

Des

ign

De

pth

(m

bg

l)

Details / Remarks

1 1.81 3 top soils Sanitary seal

2 3.81 2 laterites

2 4.31 1 laterites

3 6.31 2 Clay & sand

4 8.31 2 Clay & sand Back fill material

5 10.31 6 Clay & sand

6 10.99 42 weathered rock F 10.99 50 cement grout

6 12.31 27 weathered rock Gravel

7 14.31 50 weathered rock 5" plain casings

8 16.71 24 Granite F 17.61 200 5'' screen

9 18.71 14 Granite 18.46m End of 8'' hole

10 20.71 27 Granite 20.67m End of 6'' hole

11 22.71 29 Granite

12 24.71 34 Granite

13 26.71 34 Granite

14 28.71 29 Granite F 50.70 50

15 30.71 32 Granite

16 32.71 34 Granite

17 34.71 31 Granite

18 36.71 18 Granite

19 38.71 25 Granite

20 40.71 45 Granite

21 42.71 31 Granite

22 44.71 27 Granite

23 46.71 29 Granite

24 48.71 31 Granite

26 51.68 19 Granite

Total airlift yield: 220

Main water strike: 17.6

Materials usedmaterial unit Qty est. Qty. act. remarks

cement 50 kg bags 1.00

gravel pack 100 kg bags 28.00 28.00

gravel pack liters 360.00 1,400.00

backfill liters 318.00 318

screen lengths (nrs) 1.0

screen total length meters 2.95

screen broken pieces -

casing lengths (nrs) 7.0

casing total length meters 19.18

casing broken pieces -

bottom plugs material

seal material Cement Cement

development hours 0.0416667

INSTALLATION DATA

Drilling Depth BHD Drilling method0.00 14.52 Mud drilling

14.52 18.46 Air rotary



Equipment Depth ID OD Diameter and type0.00 16.36 127 139.7 5'' PVC Plain casings

16.36 19.1 127 139.7 5'' PVC Ribbed Screening

19.10 20.67 127 139.7 5'' PVC Plain casing

Annular space Depth Fill type

0.00 2.00 backfill DRILLING COMPANY TGS Water Ltd

2.00 3.00 cement DRILLER Okello Moses

3.00 11.00 backfill CONSULTANT

11.00 12.00 cement

12.00 20.67 gravel

SUPERVISOR

BHD, ID, OD, size are diameters in mm, depths in meters

We Consult

Byarugaba Vincent Akiiki

201328

Company reference number:

Drilling Unit

34

119

153

DWD ref. no.

Geology

114.3

203.2

Volume (l)

152.4

254

17

17

0.010.020.030.040.050.060.070.0

0 5 10 15 20 25 30 35 40 45 50 55

Rat

e (

min

/m)

Depth (m bgl)

Approximate penetration rate (per drill pipe)

GENERAL REMARKS:The borehole was drilled to a depth of 51.68m. An open hole design was adopted with 5" ID Pvc casings and screens sitting at 20.67 m below ground level in the 10 5/8", 8" and 6" hole at 14.52 m, 18.46 m and 20.65m respectively. The airlift yield was 220 l/hr at the end of development.

Test pumping was done and the borehole was able to stand pumping at 500 l/hr for 3 hours with a draw down of 30m. Platform construction, and installation of an India Mark II hand pump was completed, and the school community is currently using the borehole.

DWD 47551 Wiggins PS Att 1 Success _001VB

Borehole completion data Drilling Contract No.:

DWD 41415 Wiggins PSFinal Depth (m) 40.71 District Kumi Altitude 1156 m amslAirlift yield (m3/hr) 1.00 Sub-County Kumi Town Council GPS E 164161 UTM GridSWL (m bgl) Parish Tank Ward GPS N 603528 36NDate started 16/10/2013 Date completed 21/10/2013 401 OLD VES

Dri

ll p

ipe

Dep

th (

m b

gl)

Pen

etra

tio

n

tim

e (

min

)

Aq

uif

er t

ype

WS

L (

m b

gl)

Yie

ld (

l/h

r)

Des

ign

De

pth

(m

bg

l)

Details / Remarks

1 2.31 3 top soils Sanitary seal

2 4.31 3 laterites

3 6.31 5 Clay 5'' plain casings

4 8.31 4 Clay

5 10.31 4 course sand Back fill material

6 12.31 7 weathered rock

7 13.69 30 weathered rock 13.69 End of 10" hole

7 14.71 17 Granite

8 16.71 19 Granite 18.70 End of 6½'' hole

9 18.71 21 Granite

10 20.71 20 Granite 20.67 End of 6'' hole

11 22.71 26 Granite Cement grout

12 24.71 26 Granite F 24.00 746

13 26.71 29 Granite F 24.75 246

14 28.71 31 Granite

15 30.71 63 Granite

16 32.71 50 Granite

17 34.71 40 Granite

18 36.71 48 Granite

19 38.71 73 Granite

20 40.71 52 Granite 40.71 End of 4½'' hole

1,000

Main water strike: 24.0

Materials usedmaterial unit Qty est. Qty. act. remarks

cement 50 kg bags 1.00

gravel pack 100 kg bags 28.00 -

gravel pack liters 360.00 -

backfill liters 318.00 908

screen lengths (nrs) 1.0

screen total length meters 2.73

screen broken pieces -

casing lengths (nrs) 7.0

casing total length meters 19.18

casing broken pieces -

bottom plugs material

seal material Cement Cement

development hours 0.0833333

INSTALLATION DATA

Drilling Depth BHD Drilling method0.00 13.69 Mud drilling

13.69 18.7 Mud drilling



Equipment Depth ID OD Diameter and type0.00 20.67 127 139.7 5'' PVC Plain casings

Annular space Depth Fill type

0.00 2.00 Backfill DRILLING COMPANY TGS Water Ltd

2.00 3.00 Cement DRILLER Okello Moses

3.00 18.30 Backfill CONSULTANT

18.30 19.30 Cement

SUPERVISOR

BHD, ID, OD, size are diameters in mm, depths in meters

17

17

DWD ref. no.

Geology

114.3

165.1

Volume (l)

152.4

254

34

908

We Consult

Byarugaba Vincent A

201327

Company reference number:

Drilling Unit

Yield

0.05.0

10.015.020.025.030.035.040.0

0 5 10 15 20 25 30 35 40 45

Rat

e (

min

/m)

Depth (m bgl)

Approximate penetration rate (per drill pipe)

GENERAL REMARKS:The borehole was drilled to a depth of 40.71 m. An open hole design was adopted with 5" ID Pvc casings and screens sitting at 20.67 m below ground level in the 10" , 6½" and eventually 6" hole at respective depths below ground level of 13.69 m , 18.7 m and 20.67 m. The airlift yield was 1,000 l/hr at the end of development. A step test & a long duration test was done, platform construction, and installation of an India Mark II hand pump was completed successfull. The school community is currently using the borehole.

In future, an electric pump powered by solar energy might be installed to replace the hand pump if funds become available. The water would be pumped to a raised tank, from where it would flow by gravity to feed various water collection points like tapstands.

DWD 41415 Wiggins PS Att 2 Success_002VB



7

Annex 2 Test pumping results

Page 1of 1

Pumping test data Drilling Contract No. 201328

Borehole No. DWD 47551 Altitude 1162 m amslCompany ref no. GPS east 164246Final Depth (m) 51.68 GPS north 603608

Date: 31/10/2013 Drillers yield 0.22 m3/hrTime Started 9:40am Time Finished 12;40PMTested yield 0.50 m3/hr Duration test 180.00 minWater sample yes yes/no Duration recovery 60.00 minS.W.L at start test 6.00 m bgl DWL end of test 36.60 m bglWSL1 10.99 m bgl Drawdown 30.60 mWSL2 17.61 m bgl Recovery 82 %WSL3 50.70 m bgl Main water strike 17.61 m bglWSL4 m bgl Depth of pump 45.00 m bglWSL5 m bgl Measuring Point 0.40 m agl

Measured by : Supervisor:Company : Client :Contract : Contract :

DRAWDOWN RECOVERYTime, t Water Level Drawdown Discharge, Q Time, t Time Water Level Residual (mins) (m bgl) (m) (l/h) (min) (min) (m) Drawdown (m)

0 5.48 0.52 0 180 36.60 30.601 7.14 1.14 1 181 36.30 30.302 7.55 1.55 486 2 182 35.90 29.903 7.95 1.95 3 183 35.30 29.304 8.32 2.32 4 184 34.60 28.605 8.68 2.68 5 185 34.00 28.006 8.94 2.94 6 186 33.30 27.307 9.21 3.21 450 7 187 31.61 25.618 9.47 3.47 8 188 32.13 26.139 9.72 3.72 9 189 31.40 25.40

10 9.95 3.95 428 10 190 30.90 24.9012 10.34 4.34 12 192 29.70 23.7014 10.70 4.70 14 194 28.45 22.4516 10.99 4.99 16 196 27.23 21.2318 11.20 5.20 18 198 25.95 19.9520 11.35 5.35 428 20 200 24.80 18.8025 12.70 6.70 25 205 21.88 15.8830 13.47 7.47 30 210 19.55 13.5535 14.59 8.59 35 215 17.60 11.6040 15.50 9.50 500 40 220 16.73 10.7345 16.24 10.24 45 225 15.15 9.1550 16.73 10.73 50 230 13.83 7.8355 17.25 11.25 55 235 12.58 6.5860 17.50 11.50 60 240 11.53 5.5370 18.19 12.19 70 250 11.15 5.1580 19.70 13.70 80 26090 21.79 15.79 500100 23.71 17.71120 26.20 20.20 500140 28.69 22.69160 32.40 26.40180 36.60 30.60 500

Recommended pump installation depth 42 m bgl

Wiggins PS

OBUA BONIFACE OBUA BONIFACESSK201328

TGS Water Ltd201328

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.001 10 100 1000

Wa

ter

leve

l (m

bg

l)

Time (mins)

Water Level Vs Time

Comments : The borehole indicated a drawdown of 30.6 m when pumping at at 500 l/hr for three hours. The last dynamic water level was 36.6 m below measuring point. The recovery was 82 % in 60 minutes. Based on this data, we recommend to install the India Mark II hand pump at 42 mbgl.

TGS Water Ltd DWD 47551 Wiggins PS Att 1 Success _001VB: 12/3/2013

DWD 41415 WIGGINS PS TP ANALYSIS _ 001VB

14.92 m BH depth 40.70

SWL 6.08 m bgltop screen 1 24 m bgltop screen 2 m bgl

1.2 m3/hr0.08 m3/hr/m11.7 m3/day

1.2 m3/hr85% 1.0 m3/hr

16.0 mbgl

best fit line s per log cycleRemarks Transmissivity calculated over : t1 = 70 s= 5.01 m

t2 = 2401 capacity recommended solar pump 1 m3/hr Transmissivity calculated over : t/t''(1) = 19 s= 11.35 m2 daily yield with average 10 hrs of pumping (85% of sustainable yield) 10 m3/day t/t''(2) = 613 daily yield with 16 hrs of pumping m3/day4 expected head to pump water to surface is 16.26 m T = 0.183 * Q / s Q= 1.5 m3/h Constant rate test T= 1.3 m2/d5 install bottom of pump at 30 m bgl Q= 15 m3/d Recovery test T= 0.6 m2/d

DWL: Dynamic Water Level, SWL: Static Water Level, BH: Borehole, Q: Yield

maximum sustainable yieldpump rate at

Expected DWL Max

available drawdown

most efficient yieldspecific capacity

daily yield (average 10 hrs)

DWD: Directorate of Water Development (Ministry of Water and Environment) borehole Identification number, M: Meters, M bgl: Meters below ground level, M3/hr: Yield in cubic meters per hour, M3/day:Yield in cubic meters per day

0.00

5.00

10.00

15.00

20.00

25.0010.0 100.0 1000.0

Re

sid

ua

l Dra

wd

ow

n (

m)

t/t"

DWD 41415 BHRecovery Test

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.01 0.10 1.00 10.00

Q/s

(m

3/h

r/m

)

Time (hrs)

DWD 41415 BH Specific Capacity

step 1 : 0.4 m3/hr

step 2 : 0.8 m3/hrstep 3 : 1.2 m3/hr

0.00

0.20

0.40

0.60

0.80

1.00

1.20

0.01 0.10 1.00 10.00 100.00

Q/s

(m

3/h

r/m

)

Time (hrs)

DWD 41415 BH- Specific Capacity

12 hrs test : 1.3 m3/hr

0.00.20.40.60.81.01.21.41.61.82.0

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.000 100 200 300 400

Wa

ter

Le

vel (

bg

l)

Time (min)

DWD 41415 BH - Step Test

Water Level Recovery Yield

0.0

0.0

0.0

0.1

0.1

0.1

0.1

0.0 0.5 1.0 1.5 2.0

Sp

ec

ific

Ca

pa

cit

y (m

3/h

/m)

Yield (m3/hr)

DWD 41415 BH- Specific Capacity

1.2

1.2

1.2

1.2

1.3

1.3

1.3

1.30.00

5.00

10.00

15.00

20.00

25.00

30.001 10 100 1000

Yie

ld (

m3

/hr)

Dra

wd

ow

n (

m)

Time (min)

DWD 41415 BH12 hr Constant Rate Test

drawdown Q

step 4: 1.5 m3/h

step 5: 1.8 m3/h



8

Annex 3 Water Quality Analysis Certificates



9

Annex 4 Borehole installation Certificates

Documents

Stichting Steunfonds Kyoga - SamSamWater · Borehole completion report for 2 boreholes ... TGS 201328 Borehole Drilling and Water Supplies ... Stichting Steunfonds Kyoga Borehole