water supply design

WATER SUPPLY Design Approach And Methodologies Ir. Abdul Aziz Abas P.Eng, C.PEng, Int.PE

PREFACE

WATER SUPPLY

Preparation for life… • As a module of the Integrated Design Project course for the Bachelor of Civil Engineering programme, Faculty of Civil Engineering, UiTM, Shah Alam This program will provide basic overview of all aspects of Water Supply design approach and methodologies

Mar 2010

2

PREFACE

WATER SUPPLY

Benefit • UNDERSTANDING the subject of Civil Engineering in wider perspective, inter-relation with other subjects influencing the performance of Engineering works and challenges. • ACQUIRRING cutting edge practical design knowledge & skills that last forever in the world of ever-changing infrastructural engineering. • DEVELOPING your engineering knowledge significantly and permanently. • PROVIDING your dashing factor (distinguish factor) for better chance of employment upon graduation. • EXPAND your employment versatility in an ever-changing marketplace. • WINNING at the office and in daily job with the power of practical skill. • ADVANCING your career as an Engineer. • GAINING LEVERAGE by demonstrating knowledge of engineering in a multi-disciplinary context.

Mar 2010

3

CONTENTS

WATER SUPPLY

1. Introduction 2. Hydrology 3. Design Guidelines 4. Water Supply Planning 5. Raw Water Intake 6. Water Treatment 7. Water Transmission 8. Water Distribution 9. Water Storage 10. Water Pumping 11. Water Reticulation 12. Typical Drawings

Contents Mar 2010

4

1

INTRODUCTION 5

1

INTRODUCTION

WATER SUPPLY

Definition

Water is a ubiquitous chemical substance that is composed of hydrogen and oxygen and is vital for all known forms of life

Water supply is the process of self-provision or provision by third parties in the water industry, commonly a public utility, of water resources of various qualities to different users

Water Supply System is facilities for the collection, treatment, storage, and distribution of water

Mar 2010

6

1

INTRODUCTION

WATER SUPPLY

Overview of World Water Supply

Source: UNDP. Data as of 2006 7 Mar 2010

7

1 MINISTRY OF FINANCE (MOF)

INTRODUCTION

WATER SUPPLY

Malaysian Water Authority

KEMENTERIAN TENAGA, TEKNOLOGI HIJAU DAN AIR (KeTTHA) Ministry of Power, Green Technology And Water SURUHANJAYA PERKHIDMATAN AIR NEGARA (SPAN) National Water Services Commission

Regulator

WSIA 2006 PENGURUSAN ASET AIR BHD (PAAB) Water Asset Management Company (WAMCO)

Facilities Licensee

SPAN’s Representatives

SEWERAGE SERVICES

WATER SUPPLY SERVICES

ALL STATES PERLIS

KEDAH

P.PINANG

PERAK

SELANGOR

PAHANG IWK

JKR

SADA T’GANU SATU

PBA

LAP

JBA

SYABAS

N.SEMBILAN

MELAKA

JOHOR

K’TAN

SAINS

SAMB

SAJ

AK

Service Licensee

Design Guidelines SPAN as the technical and economic regulator and set out the function and powers of SPAN WSIA provides the legal framework required for the regulation of the water and sewerage service industry PAAB Water asset owner

88 Mar 2010

8

1

INTRODUCTION

WATER SUPPLY

Typical Water Supply System

Mar 2010

9

2

HYDROLOGY 10

2

HYDROLOGY

WATER SUPPLY

Hydrological Cycle 11 Mar 2010

11

1 Suitable raw water source (low contamination)

Concept of Raw Water Source

HYDROLOGY

WATER SUPPLY

Non-Suitable raw water source (high contamination)

12 Mar 2010

12

1

HYDROLOGY

WATER SUPPLY

Raw Water Intake

Impounding reservoir

Water Shed (Catchment Area)

13 13 Mar 2010

13

1

HYDROLOGY

WATER SUPPLY

Impounding Reservoir

14 14 Mar 2010

14

Mar 2010

3

Design Guidelines 15

3

DESIGN GUIDELINES

WATER SUPPLY

Typical Water Demand Guidelines

Water Demand Criteria Type of Water Demand Housing Hotel Commercial Industrial Ships Supply* Port Area (Incl. ships supply)*

Demand Criteria 1.6 CuM/unit/day 1.5 CuM/room/day 6.0 CuM/Acre/day 20.2 CuM/Acre/day 160 CuM/Ship 6.0 CuM/Acre/day

16 16 Mar 2010

16

3 National Guidelines for Raw Drinking Water Quality (Revised December 2000) Parameter Sulphate Hardness Nitrate Coliform Manganese Chromium Zinc Arsenic Selenium Chloride Phenolics TDS Iron Copper Lead Cadmium Mercury

Symbol SO4 CaCO3 NO3 Mn Cr Zn As Se Cl Fe Cu Pb Cd Hg

Source : Ministry of Health, Malaysia

Benchmark 250 mg/l 500 mg/l 10 mg/l Must not be detected in any 100 ml sample 0.1 mg/l 0.05 mg/l 3 mg/l 0.01 mg/l 0.01 mg/l 250 mg/l 0.002 mg/l 1000 mg/l 0.3 mg/l 1.0 mg/l 0.01 mg/l 0.003 mg/l 0.001 mg/l

DESIGN GUIDELINES

WATER SUPPLY

Water Quality Guidelines

Secondary Drinking Water Standards Contaminant Aluminum Chloride Color Copper Corrosivity Fluoride Foaming Agents Iron Manganese Odor pH Silver Sulfate Total Dissolved Oxygen Zinc

Secondary Standard 0.05 to 0.2 mg/L 250 mg/L 15 (color units) 1.0 mg/L noncorrosive 2.0 mg/L 0.5 mg/L 0.3 mg/L 0.05 mg/L 3 threshold odor number 6.5-8.5 0.10 mg/L 250 mg/L 500 mg/L 5 mg/L

Source: EPA Standard

Note: US Environmental Protection Agency (EPA) guidelines

17 17 Mar 2010

17

3

DESIGN GUIDELINES

WATER SUPPLY

Typical Design Criteria

• Water Distribution

Max Pressure Zones ≤ 40 m (S’gor) Max Pressure Zones ≤ 60 m (JKR)

• Transmission Pipeline

Residual Pressure ≥ 1 bar Velocity ≤ 1.0 m/sec Max Test Pressure = 15 bars

• Water Storage

Minimum ; 1-day Maximum ; 3-day Suction Tank ; 1/3 x Demand Service Tank ; 2/3 x Demand

• Pumping System

Velocity ≤ 1.0 m/sec Max head ; Pump curves

• Reticulation Pipelines

Head loss ≤ 2m / km Velocity ≤ 0.6 m/sec Residual Pressure ≥ 7.5m above HSL Hydrants Pressure ≥ 1.0 bar

• Minimum pressure in a system

5 psi (0.35 bar) 18 18 Mar 2010

18

3

DESIGN GUIDELINES

WATER SUPPLY

Typical Water Supply System

TREATMENT STAGE DISTRIBUTION STAGE CONSUMPTION STAGE

Rp ≈ 3m

Rp ≈ 3m Pressure Zone ≤ 40m

Balancing Reservoir

Max Pressure Zone = 40m Rp ≥10m

Velocity ≤1m/s

Rp ≥7.5m

Rp ≥10m

Break Tank

P Suction Tank

Service Tank

Rp ≈ 3m

Rp ≥7.5m

Service area

P Treatment Work

Hydrants Velocity ≤2.5m/s

TRANS. PIPELINE (Inter-resv) Intake

Rp ≥10m

Velocity ≤0.6m/s

TRANSMISSION PIPELINE

Velocity ≤1m/s

PUMPING MAIN

Velocity ≤0.6m/s

RETICULATION PIPES

19 Mar 2010

19

Mar 2010

4

Water Supply Planning 21

4

WATER SUPPLY PLANNING

WATER SUPPLY

Development Masterplan

Mar 2010

22

Landuse

4

WATER SUPPLY PLANNING

WATER SUPPLY

Ultimate Water Demands

Ultimate projected Demand year 2040 Mar 2010

23

Non Revenue Water High NRW rate @ 42%, Pahang State 37%

4

WATER SUPPLY PLANNING

WATER SUPPLY

- 70% Connection leak - 20% Pipe burst - 10% Others

Average NRW Asian Countries = 30% Average (Developed Countries+ Asean) = 23%

Target = 25% Mar 2010

24

4

WATER SUPPLY PLANNING

WATER SUPPLY

Water Demands Projection

2008 (CuM/day)

2010 (CuM/day)

2015 (CuM/day)

2020 (CuM/day)

2025 (CuM/day)

2030 (CuM/day)

2035 (CuM/day)

2040 (CuM/day)

5,968

5,968

5,968

5,968

5,968

5,968

5,968

5,968

0

109

380

930

1,555

2,180

3,230

4,280

48,662

48,662

48,662

48,662

48,662

48,662

48,662

48,662

Industry (Proposed)

0

2,885

10,096

19,974

23,386

26,797

36,905

47,013

Very Heavy Industry (Iron Steel, Bio-fuel, POIC, Petchem, Lynas)

0

10,877

38,071

101,372

118,224

135,077

148,142

161,206

Tourism Zone

0

433

1,516

1,516

1,516

1,516

1,516

1,516

Commercial & Nursery

0

213

745

1,091

1,296

1,501

1,733

1,966

Residential

2,831

3,259

17,383

27,803

37,816

47,828

61,587

75,347

Mixed use

0

19

65

151

295

439

542

644

1,440

2,295

4,432

5,022

5,227

5,432

6,154

6,876

0

0

0

0

25

50

Landuse Existing Kuantan Port Area Proposed Extension Port Area** Industry (Existing)

School & Institutional & Logistic Park Golf course

0

Railway Station / Transit Oriented Dev (TOD)

0

0

0

0

69

138

138

138

NRW %#

42.00%

40.00%

35.00%

30.00%

25.00%

25.00%

25.00%

25.00%

NRW (CuM/day)

24,738

29,887

44,561

63,746

61,003

68,885

78,650

88,415

TOTAL (CuM/day)

83,639

104,605

171,877

276,234

305,016

344,423

393,250

442,077

19

24

39

61

67

76

87

98

TOTAL (Million Gallons/day)#

Projected Water Demands

Mar 2010

25

4

WATER SUPPLY PLANNING

WATER SUPPLY

Water Demands

Established Demand Ultimate projected Demand

Projected Water Demands

Mar 2010

26

4

WATER SUPPLY PLANNING

WATER SUPPLY

Regional Context

IMPOUNDING RESERVOIR

PROJECT SITE

Kuantan

Topographical Map Mar 2010

27

4

WATER SUPPLY PLANNING

WATER SUPPLY

Regional Context

Cereh Dam

PROJECT SITE

98 MGD

Kuantan

Terrain Map Mar 2010

28

5

RAW WATER INTAKE

5

RAW WATER ABSTRACTION

WATER SUPPLY

Cereh Dam Cereh Dam

PROJECT SITE

Sg. Kuantan Water Catchment Area

15km Sg. Kuantan

Semambu Treatment Work 10km

Kuantan

Kg. Kobat Baru Water Intake

Mar 2010

31

5

RAW WATER ABSTRACTION

WATER SUPPLY

Raw Water Intake

Intake structure

Wier

By-pass

Q abstraction = Ultimate Demand + Plant Use Mar 2010

32

5 Intake structure

RAW WATER ABSTRACTION

WATER SUPPLY

Raw Water Intake

Q abstraction Raw Water Transmission pipeline To WTP

Intake station Platform Level = 100 years flood level

Headwork Bridge Overflow gate

Suction level

Q abstraction = Ultimate Demand + Plant Use Mar 2010

33

6

WATER TREATMENT

6

WATER TREATMENT

WATER SUPPLY

Cereh Dam Cereh Dam

PROJECT SITE

Sg. Kuantan Water Catchment Area

15km Sg. Kuantan

Semambu Treatment Work 10km

Kuantan

Kg. Kobat Baru Water Intake

Mar 2010

35

6

WATER TREATMENT

WATER SUPPLY

Typical Water Treatment System

Aerator

36 Mar 2010

36

6

WATER TREATMENT

WATER SUPPLY

Water Treatment Plant

1 Aerator

3 2

4 4

5 5 3

2

1

Mar 2010

37

6

Supply of potable water

WATER TREATMENT

WATER SUPPLY

Water Treatment Plant

1 Aerator

3 2

4 4

5 5 3

2

Incoming raw water

1

Mar 2010

38

7

WATER TRANSMISSION

7

WATER TRANSMISSION

WATER SUPPLY

Gravity Flow PROJECT SITE

Source point GL 60m

GL 37m Ch.15000m

Ground level

15km

Transmission pipeline Transmission pipeline

Semambu Treatment Work

GL 60m Ch.0m

Supply point GL 37m

Kuantan

Ch 0.00m

Longitudinal Profile

Ch 15000.00m

Mar 2010

40

7 • • • • • • • •

WATER TRANSMISSION

Ultimate Demand (Q) = 98.0CuM/day Peak factor f = 1.2 Total pipe length (L) = 15km Consider minor losses = 20% Source point Bottom Water Level @ TW (B) = 60.0m ODL Top Water Level @ Project Site (T) = 40.0m ODL GL 60m Required Residual Pressure (Hr) = 10m Design transmission period (t) = 20 hours / 24 hours

WATER SUPPLY

Gravity Flow

Thus • • •

Design Flow, Qd = Q * f / t Permissible Head Loss, HL = (B –T + Hr) / (L * 1.2) Roughness Coefficient, C = 100

Ground level

Hence, Using Hazen-William Formula •

HL =

10.6*Qd^1.85 C^1.85*D^5.015

• •

Adopt Diameter of pipes, D = 1.8m dia Recalculate Velocity, V = 0.64 m/sec

Transmission pipeline

Ch 0.00m

Longitudinal Profile

Supply point GL 37m

Ch 15000.00m

Mar 2010

41

7

WATER TRANSMISSION

WATER SUPPLY

Mar 2010

42

7

WATER TRANSMISSION

WATER SUPPLY

Mar 2010

43

8

WATER DISTRIBUTION

8

WATER DISTRIBUTION

WATER SUPPLY

Water Supply Zones

6
Suit development phasing

5


Reliable distribution system
Construction cost effective
Ease of maintenance

3 1


Control of NRW

2 4

Mar 2010

45

8

WATER DISTRIBUTION

WATER SUPPLY

Hydraulics & Service Coverage Consideration

Balancing Tank

Residual Pressure Residual Pressure

Supply Zone 1

Service coverage

Supply Zone 2

Service coverage

Residual Pressure

Supply Zone 3

Service coverage

Mar 2010

46

8

WATER DISTRIBUTION

WATER SUPPLY

Centralised Service Tank & Pressure Analysis

Mar 2010

47

8

To Cherating (future)

WATER DISTRIBUTION

WATER SUPPLY

Main Distribution Pipes Network

R7

5

Timur

R5

R4

R2 R9 R8

Balancing Tank R1

LEGEND Distribution Pipes Network

R3

Storage Tank

Transmission pipeline To Kuala Lumpur

From Treatment Plant

Mar 2010

48

9

WATER STORAGE

9

WATER STORAGE

WATER SUPPLY

Water Storage Demands (Without NRW)

2008 (CuM/day)

2010 (CuM/day)

2015 (CuM/day)

2020 (CuM/day)

2025 (CuM/day)

2030 (CuM/day)

2035 (CuM/day)

2040 (CuM/day)

5,968

5,968

5,968

5,968

5,968

5,968

5,968

5,968

0

109

380

930

1,555

2,180

3,230

4,280

48,662

48,662

48,662

48,662

48,662

48,662

48,662

48,662

Industry (Proposed)

0

2,885

10,096

19,974

23,386

26,797

36,905

47,013

Very Heavy Industry (Iron Steel, Bio-fuel, POIC, Petchem, Lynas)

0

10,877

38,071

101,372

118,224

135,077

148,142

161,206

Tourism Zone

0

433

1,516

1,516

1,516

1,516

1,516

1,516

Commercial & Nursery

0

213

745

1,091

1,296

1,501

1,733

1,966

Residential

2,831

3,259

17,383

27,803

37,816

47,828

61,587

75,347

Mixed use

0

19

65

151

295

439

542

644

1,440

2,295

4,432

5,022

5,227

5,432

6,154

6,876

0

0

0

0

25

50

Landuse Existing Kuantan Port Area Proposed Extension Port Area** Industry (Existing)

School & Institutional & Logistic Park Golf course

0

Railway Station / Transit Oriented Dev (TOD)

0

0

0

0

69

138

138

138

NRW %#

42.00%

40.00%

35.00%

30.00%

25.00%

25.00%

25.00%

25.00%

NRW (CuM/day)

24,738

29,887

44,561

63,746

61,003

68,885

78,650

88,415

TOTAL (CuM/day)

83,639

104,605

171,877

276,234

305,016

344,423

393,250

442,077

19

24

39

61

67

76

87

98

TOTAL (Million Gallons/day)#

Mar 2010

50

9

Established Storage Demand

WATER STORAGE

WATER SUPPLY

Water Storage Demands

Ultimate projected Storage Demand

Mar 2010

51

9

To Cherating (future)

WATER STORAGE

WATER SUPPLY

Distribution of Storage Tanks

R1 + R2 + R3 + …………. + R9 = 1 Day Storage R7

5

Timur

R5

Mandatory requirement R4

R2 R9 R8

R1

R3

LEGEND Proposed Storage Tank

Balancing Tank To Kuala Lumpur

From Treatment Plant

Mar 2010

52

9

Aim

WATER STORAGE

WATER SUPPLY

Mass-balance Analysis

To establish a balance flow system

Q in = Q out Vt To determine 1. 2. 3. 4.

Q Q in Q out Qp

Demand Volume in Volume out Volume Pumping

Suction Tank Size Elevated Tank Size Transmission (incoming) flow period Transmission pipeline size

Vs

P

Qp

Q out

Q in Vs = 1/3*Q

Vt = 2/3*Q Mar 2010

53

9

WATER STORAGE

WATER SUPPLY

Typical Water Storage Structures

Mar 2010

54

9

WATER STORAGE

WATER SUPPLY

Typical Water Storage Application

Mar 2010

55

10

WATER PUMPING

10

WATER PUMPING

WATER SUPPLY

Purpose

Water have two main purposes: • Transfer of liquid from one place to another place • Circulate liquid around a system

Mar 2010

57

10

WATER PUMPING

WATER SUPPLY

Purpose

Residual Pressure

Residual Pressure

Pressure booster

Vacuum point

Mar 2010

58

Positive Suction Head Arrangement

hsafety

9

WATER PUMPING

WATER SUPPLY

Water Pumping Analysis

hvd

HT = Hd - Hs

hfd hpd = Atm. pressure

Hd

HT Total Pumping Head hv Vapour Head hf Friction Head hp Pressure Head h Static Head hsafety Safety Head Hd Total Discharge Hs Total Suction

hd Elevated Service Tank

Suction Tank

hvs Hs

hps = Atm. Pres.

Q in

Q out

hs hfs

P

Mar 2010

59

Negative Suction Head Arrangement

hsafety

9

WATER PUMPING

WATER SUPPLY

Water Pumping Analysis

hvd

HT = Hd + Hs

hfd hpd = Atm. pressure

Hd

HT Total Pumping Head hv Vapour Head hf Friction Head hp Pressure Head h Static Head hsafety Safety Head Hd Total Discharge Hs Total Suction

hd Suction Tank

Elevated Service Tank P

hs Q in

hvs

Hs hfs

Q out

hps = Atm. Pressure Mar 2010

60

10

WATER PUMPING

WATER SUPPLY

Water Pumping Analysis

Pump Operating Point

Mar 2010

61

10

WATER PUMPING

WATER SUPPLY

Water Pumping Analysis

HT

Qp Typical Pump Curve & Selection of pump

Mar 2010

63

11

WATER RETICULATION

11

WATER RETICULATION

WATER SUPPLY

Water Supply Zone 5 4

3 Draw off

Node 5 Draw off

Reticulation pipes In loop system

R5 Draw off

Service Tank

R5

8

2 6

1

7 12

9 10

Reticulation pipes In loop system

11

Mar 2010

66

11

WATER RETICULATION

WATER SUPPLY

Zone 5 - Water Demand Calculation

Zone 5 – Ultimate Demand (Year 2040)

Mar 2010

67

Dominant Flow

11

WATER RETICULATION

WATER SUPPLY

Critical Scenario Consideration

Case 1 (Fire Flow) : Average Flow + Fire Flow Case 2 (Peak Flow) : Average Flow x Peak Factor Consider Dominant Flow for water reticulation analysis Thus, Case 1 : (19,175.50 CuM/day x 1000/24/3600 ) + 2 (22.5 lit/sec) = 267 lit/sec Case 2 : (19,175.50 CuM/day x 1000/24/3600) x 2.5 = 555 lit/sec

Hence, Peak Flow condition is dominant

Mar 2010

68

11

13.0

4

13.0

8.5

WATER RETICULATION

WATER SUPPLY

Reticulation Analysis

9.5

8

180.0 lit/sec

3 8.0 lit/sec

Node 8

6.0

Formation Ground Level 6.0m ODL

13.0

Highest Supply Level 13.0m ODL

13.0 6.5

1

5

Pipe No 1, Length 1000m

1000

99.0 lit/sec

BWL 32.0

R5

Bottom Water Level 32.0m ODL Service Tank R5

13.0 7.5 12.0

BWL 32.0

1

1

7.0

6.0

2

R5

13.0

31.0 lit/sec

218.0 lit/sec

8 1.0 lit/sec

6 11

7

1000

9

1500

12 6.0 13.0

6.0

10

7 1000

7.0

Iteration using Hardy-Cross method

10.0 lit/sec 13 1500

7.5 13.0

13.0 8.0 lit/sec

13.0

11

Peak Flow Analysis Peak Factor = 2.5

6.0

Mar 2010

70

11

WATER RETICULATION

Reticulation Analysis

Node ID

Elevation (m)

Base Demand LPS

Demand LPS

Head (m)

Residual Pressure

1 Resv

33

#NA

-555.0

33.0

0.00

2

13

31

31.0

31.82

18.82

3

13

8

8.0

28.91

15.91

4

13

180

180.0

27.27

14.27

5

13

99

99.0

24.93

11.93

6

6

0

0.0

29.12

23.12

7

6

0

0.0

29.10

23.10

8

13

1

1.0

27.40

14.40

9

13

10

10.0

26.66

13.66

10

13

0

0.0

29.27

16.27

11

13

8

8.0

29.55

16.55

12

13

218

218.0

30.41

17.41

Analysis using Epanet Version 2.0

WATER SUPPLY

71 Mar 2010

71

11

WATER RETICULATION

WATER SUPPLY

Reticulation Analysis

Link ID

Length (m)

Diameter (mm)

Roughness

Flow LPS

Velocity (m/s)

Headloss (m/km)

Pipe 1

1000

900

100

555.00

0.87

1.18

Pipe 2

5000

800

100

277.05

0.55

0.58

Pipe 3

3000

800

100

269.05

0.54

0.55

Pipe 4

2000

450

100

89.05

0.56

1.17

Pipe 5

4000

200

100

-9.95

0.32

1.05

Pipe 6

1000

200

100

1.17

0.04

0.02

Pipe 7

1000

200

100

-3.69

0.12

0.17

Pipe 8

2000

300

100

-9.87

0.14

0.14

Pipe 9

2000

300

100

-17.83

0.25

0.43

Pipe 10

3000

800

100

-246.95

0.49

0.47

Pipe 11

1500

150

100

4.87

0.28

1.13

Pipe 12

1000

150

100

3.87

0.22

0.74

Pipe 13

1500

150

100

-6.13

0.35

1.74

Pipe 14

1000

200

100

-11.12

0.35

1.29

Analysis using Epanet Version 2.0

Mar 2010

72

11

WATER RETICULATION

WATER SUPPLY

Reticulation Pipes Network

BWL 32.0

R5

Bottom Water Level 32.0m ODL Service Tank R5

R5 BWL 32.0

Mar 2010

73

11

WATER RETICULATION

WATER SUPPLY

Overall Water Supply System

R7

LEGEND Transmission Pipeline Distribution Pipelines External Storage Tanks Main Reticulation Pipelines

Timur

R5

R6

R4

R2 R9 R8

R1

R3

WATER DEMANDS To Kuala Lumpur

From Treatment Plant

TANKS SCHEDULE

Mar 2010

74

12

TYPICAL DRAWINGS

12

TYPICAL DRAWINGS

WATER SUPPLY

Proposed Bulk Meter

Proposed Tapping Point by Hot tapping method

Transmission Pipeline

Mar 2010

76

12

TYPICAL DRAWINGS

WATER SUPPLY

Water Reticulation

Mar 2010

77

12

TYPICAL DRAWINGS

WATER SUPPLY

Plan of Suction Tank & Pump House

Pump House

Suction Tank Mar 2010

78

12

TYPICAL DRAWINGS

WATER SUPPLY

Cross-section of Suction Tank & Pump House

Mar 2010

79

24800 24000 9200

4700

9200

12

TYPICAL DRAWINGS

WATER SUPPLY

Elevated R.C. Water Tank

5765

5265

TWL=35.26m

6667

6667

BWL=30.0m

1450

6667

6667

26668

Overflow pipe

Mar 2010

80

12

TYPICAL DRAWINGS

WATER SUPPLY

Constructed Water Storage Tanks & Pumping System Mar 2010

81

Thank You Terima Kasih

Mar 2010

82

Questions & Answers

Email: [email protected] July 2009

83