Thesis present voeng soavandara

MINISTRY OF EDUCATION, YOUTH
AND SPORTS
Institute of Technology of Cambodia
Department of Rural Engineering
32nd Generation
ប្រធានរទ: ការសិក្សារល ើប្រព័នផផ្គត់ផ្គង់ទឹក្សស្អា តលៅប្ស ុក្សអនលង់ វែង លេតតឧតតរមាន
ជ័យ
Topic : Study on Water supply system in Anlong Veng District
,Oddar Meanchey province
Student : Mr. VOENG Sovandara
Advisor : Mr. LUN Sambo
2016 - 2017
Final presentation
Date : 11 July 2017

2
Outline
I. INTRODUCTION
II. MATERIALS AND METHODS
III. RESULTS
IV. CONCLUSIONS AND RECOMMENDATION
WATER RESOURCES | MODELLING|CLIMATE CHANGE| GIS-REMOTE SENSING | WATER & SANITATIONDEPARTMENT OF RURAL ENGINEERING

3
I. INTRODUCTION
 The water supply and sanitation in rural Cambodia
does not have enough safety water for rural families,
that they mostly get water from wells, ponds, ground
water by digging and rain fall.
 The MOWRAM has studied the water source of
Streng sreng river in Oddar Meanchey provice, that
can enough supply water to Anlong Veng district as
well.
 The Rural area like Anlong Veng district also need
clean water to use daily consumption, prevent people
health.

4
I. INTRODUCTION
Water supply system diagram

5
I. INTRODUCTION
1. Calculation the daily and hourly water demand for those
study area
2. Design diameter of main pipes in the network for two
communes in Anlong Veng district
3. Select pump system for distribution network
 objective of the study

6
1. Study area
 The study location situated
in Anlong Veng and
Lumtong commune in
Anlong Veng district at
Oddar Meanchey
province.
 The water source got from
Steng Sreng river.

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2. Flow chart of study
Auto Cad
Google Earth
ArcGIS
Present
Population
Water
consumption unit
Water demand
Pipe line layout
Water distribution
network (diameter,
velocity, pressure head)
Pump model
selection

8
2. The length section of the study
WTP
IA6 = 5975 m
IB5 = 7195 m
IC4 = 4855 m
IC7 = 7125 m

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𝑸 𝒔𝒆𝒄𝒕𝒊𝒐𝒏 𝒇𝒍𝒐𝒘 𝒓𝒂𝒕𝒆 = 𝒒 𝒖𝒏𝒊𝒕 × 𝑷 𝒏
5. Calculation the section flow rate
 𝐪 𝐮𝐧𝐢𝐭 ∶ 𝑡ℎ𝑒 study assume 𝑤𝑎𝑡𝑒𝑟 𝑐𝑜𝑛𝑠𝑢𝑚𝑝𝑡𝑖𝑜𝑛 𝑖𝑠 70
𝐿
𝑑𝑎𝑦
/𝑝𝑒𝑟𝑠𝑜𝑛
( The KWSH report, 2014 )
 Pn : The total population in each section
 According to Ministry of Industry and Handicraft guideline that the
project water supply consumptions assumption 70 % to calculate
the total population, on water distribution.

10
 Section flow rate diagram
WTP

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6. The Nodal demand
𝑸 𝑵𝒐𝒅𝒆 =
𝟏
𝟐
× 𝑸 𝐬𝐞𝐜𝒕𝒊𝒐𝒏_𝒇𝒍𝒐𝒘 𝒓𝒂𝒕𝒆
Qsection : The flow rate in pipe section at nodal point ( m3/s)
Qnode : Flow rate at node point ( m3/s)

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 Nodal flow rate diagram

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7. Design water demand ( accumulation Qsection ) in whole study
QHighest: 0.0215 m3/s

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8. Design the section pipe diameter ( d )
The flow rate formula’s form:
𝑄 = 𝑉 × 𝐴
2
d
A
4
P ´
=
d =
4×Q
Π×V
Q : the section flow rate ( m3/s)
A : the cross section of Area ( m2 )
V : The section velocity of pipe ( m/s )
d : The diameter of pipe section ( m & mm)

15
 The section pipe diameter
dwtp = 200 mm

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9. Calculation the section head loss
𝒉 𝑳 =
𝟏𝟎. 𝟕 × 𝑳 × 𝑸 𝟏.𝟖𝟓𝟐
𝐂 × 𝐝 𝟒.𝟖𝟕
The formula Hazen-Williams:
hL : The section head loss (m)
C : The roughness coefficient, HDPE Pipe C = 140
L : The section length of pipes (m)
d : The section diameter (m)

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 Total head loss at the remotest node of section
Minor head loss = 0.3/km

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8. The Pressure Head at nodal point
𝑃1 +
𝑉1
2
2𝑔
+ 𝑍1 = 𝑃2 +
𝑉2
2
2𝑔
+ 𝑍2 + ℎ 𝐿
P1 : The pressure at nodal 1
P2 : The pressure at nodal 2
V1 : The velocity at nodal 1
V2 : The velocity at nodal 2
Z1 & Z2 : The elevation at nodal 1 & 2
hL : The total head loss
 The Bernoulli’s equation formula:

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 The Pressure head at the remotest end point
WTP
Residual pressure > 3m
( Rural area )

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9. The pumping selection chart ( EBARA model )
65-160/9.230m
80m3/h

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 The Pumping selection Model: 3D 65-160/9.2
3m
30 m
8 kw
83%
80 m3/h

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III. RESULTS
 The diameter of design and length of pipes for this study
Diameter of pipe (mm) Length of pipe (m) Types of pipe
200 195 HDPE, PN8
160 346 HDPE, PN8
125 4069 HDPE, PN8
110 3070 HDPE, PN8
90 2973 HDPE, PN8
75 7603 HDPE, PN8
63 4943 HDPE, PN8

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III. RESULTS
• Total Head: 30m
• Flow rate: 80 m³/h
• Efficiency: 83 %
• NPSH: 3m
• Rotating speed: 2900 r/min
• Pump power: 8 kW
 Brand: EBARA, Model: 3D 65-160/9.2

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IV. CONCLUSIONS
 The pipe line has the total length, 23199 meters
The total water demand per day is 1860 Cubic meter per day
The diameter of pipes ( HDPE PN8 ): The smallest diameters are
63mm and the largest diameter is 200mm.
 Pump Selection: Brand EBARA, Model: 3D 65-160/9.2
The conclusions are summarized as list below:

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IV. Recommendation
 The number of population, daily and hourly water consumption
and land elevation should be directly surveyed from the study
area.
 The water tank should be designed to save pump energy.
 the ground reservoir should have depended on water treatment
plant capacity and daily consumption.

Thesis present voeng soavandara

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