1. Hydrological Study & Flood Mapping of Wadi Zeimar-Anabta Town
Mohammad Zayed Waleed Saadeh
2010

2. The Project
Hydrological study and flood mapping of Wadi Zeimar, that flows through Anabta town and causes many impacts and problems to the people of Anabta
This project aims to address Wadi Zeimar problem and put it under discussion and research. Flood mapping is done to predict future flood related problems

3. What Has Been Done ?
Data and documents about the problem and project area were collected
A questionnaire was applied to get further information about water and wastewater status
Data and flow analysis
Flood mapping
Conclusions and recommendations

4. Study Area
Anabta is one of the largest towns of Tulkarm governorate, located in the northern West Bank
It has a population of 8,000 inhabitants (2010)
Anabta land parcels is about 15,500 donums
It is about 150 meters AMSL
Annual rainfall of Anabta town is 645 mm

5. Location of Anabta

6. The Problem
Wastewater from Nablus west and other villages flow open in wadi Zeimar
During winter, storm water is flowing in the wadi along with the sewage
Environmental and flood problems
Pollution of groundwater wells and public health problems

7. Impacts of The Problem
Good environment for rodents and insects that transport microorganisms and cause diseases
Increased rate of cancer in Anabta
Leakage of sewage to the groundwater
Very bad smells from the sewage
Uncivilized appearance

8. The Problem By Photos

10. Problem by photos

11. Questionnaire Output
Water resources is mainly from the municipality wells
Water consumption is 83 l/c.d
The monthly average water consumption is 25,000 m³
The monthly peak factor is 1.5
Annual increase of water consumption is calculated at 4%

12. Questionnaire Output

13. Questionnaire Output
Sewage disposal methods in Anabta

14. Flow Analysis
Methodology

15. Flow Analysis Wastewater flow using flow measuring device
Length = 18.1 m
Width = 3.1 m
∆ elevation = 18 cm
Slope = 1%
Manning coefficient
n = 0.015

16. Flow Analysis
Water level over a day August 30, 2006

17. Flow Analysis
Water level vs flow rate

18. Flow Analysis 2) Wastewater flow using conversion factor
Water consumption and sewage flow vary as to the contributing areas
Wastewater conversion factor is 80%
Q 2007 = 0.19 m³/s
Q direct measuring = 0.15 m³/s
The difference is 20%

19. Flow Analysis Storm Water Analysis Rational Method
Rainfall Intensity i = 16 mm/hr
Retaining period Tr = 25 year
Duration tc = 160 min
Runoff Coefficient C = 0.32
Catchment Area A= 129 km²
Flow rate Q = 185 m³/s

20. Land Use of Wadi Zeimar Catchment Area

21. Flow Analysis
Runoff coefficient based on land use

22. Flow Analysis
Catchment Area

23. Flow Analysis 2) SCS Method Rainfall intensity i = 16 mm/hr
Retaining period Tr = 25 year
Curve number CN = 74 (weighted)
Runoff h = 2.4 in
Duration tc = 160 min
Catchment Area A= 129 km²
Peak flow rate Qp = 233 m³/s
Modified peak flow rate Q modified = 140 m³/s (reduced by 40%)

24. Flow Analysis
Flow Hydrograph

25. Flow Analysis
Flood Mapping

26. Flow Analysis
The most critical section

27. Flow Analysis

28. Recommendations
Construct Nablus and Tulkarm WWTPs, and Wastewater collection systems
Cleaning the route of wadi
Enlarging some critical sections
Control the route of the wadi and prevent garbage dumping
Repairing and calibrating the measurement device
Keep the wadi clean!!!

29. Thank you for your attention