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An - Najah National University Civil Engineering Department Design The Water Distribution Network For Raba Village Prepared By: Khalid Said Qassarwi, Osama Isam Qubbaj. Supervised by: . Dr. Anan Jayyousi 2011
The Objective of the Project: 1 -The main objective of this project is to design the water distribution network for Raba Village with the aid of EPANET. 2 - Solve the problem that occurs for purchasing water by tanks. 3 - Reduce cost and effort.
Study Area - Raba is located 12 km to South east of the city of Jenin in the northern part of west Bank. - Raba is hilly village elevated about 500 m above mean sea level. - The area of Raba is about 25, 642 Dunums. - Topographically, the village is a level area. - Raba has a population of about 3, 750 inhabitants.
Location of Raba: Qaryut
Questionnaire Analysis: Family Study. Age Distribution. level of education. Purchase water.
Area before partition:
Area after partition:
Existing Water demand: v Population = 3, 750 capita. v Area = 25, 642 Dunums. v Density of the Population = 2. 5 C/dunums. v Consumption = 75 L/C. d v UFW = 25%. (assumption).
Future water demand: v Growth rate (r) = 3%. v Design Period = 30 years. v Future Population =9, 100 Capita. v Water Consumption (according WHO)= 100 L /C. d
Future water demand: v UFW: 15%. v Future Demand =118 L /C. d v Demand factor = 2. 9 v Used Hazen-Williams equation. v Hazen-Williams factor (C) = 120.
Design Criteria: v Head pressure should be not more than 100 m, and not less than 20 m. v Maximum velocity should not be greater than 3 m/sec, and minimum velocity should not be less than 0. 1 m/sec.
The Results: - The first result is high pressure, and low velocity. - from the above result , we conclude that the diameter is over sizing, and it should be reduced. -The pipes were reduced from 6` , 4` , 3` to 4` , 3`, 2` respectively. - Some pipes reduced from 2` to 1`. The results is acceptable the design criteria, and these result as the following: The Pressure: All the pressure in the pipes is acceptable. which range between (22. 31 -95. 93 m). - The velocity: Most of the velocities are within range, but some nodes in the end of the network are low(0. 06 m/s), but in general the velocity is acceptable. -
The results after modified: The results is acceptable the design criteria, and these result as the following: - The Pressure: All the pressure in the pipes is acceptable. which range between (22. 31 -95. 93 m). - The velocity: Most of the velocities are within range, but some nodes in the end of the network are low(0. 06 m/s), but in general the velocity is acceptable.
The results before modified:
The results after modified: 7 Results
Estimated cost for the Network: Diameter (inch) Unit Quantity Unit Price ($/m) Total Cost (m) 1 L. M 5064 20 101280 2 L. M 6155 28 172340 3 L. M 1020 45 45900 4 L. M 1215 52 63180 Total 382700
Information about the project - The pumping is continuous. - The project period is one year. - The water is distributed by the gravity. - The reservoir capacity is 500 m 3. - The project is near completion, and will start in house connections.
6. 1. 2 Qusra Reservoir: