Assessment of Artificial Groundwater Recharge in Some Wadies in UAE by using Isotope Hydrology Techniques Presented by : Ahmed Saif Al Matri Head , Water Resources Section Ministry of Environment & Water U.A.E Prepared for : The 8 th Gulf Water Conference Manama – Bahrain 3 – 6 March 2008
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Assessment of Artificial Groundwater Recharge in Some
Wadies in UAE by using Isotope Hydrology
Techniques
Presented by :Ahmed Saif Al Matri
Head , Water Resources SectionMinistry of Environment & Water U.A.E
Prepared for :
The 8th Gulf Water Conference
Manama – Bahrain
3 – 6 March 2008
Location map of the United Arab Emirates
52o 53o 54o 55o 56o
25o
24o
23o
50 km
OMAN
ARABIA
Arabian Gulf
Abu Dhabi
Dubai
Ras Al Khaimah
Gulf
of
Om
anN
Diba
Kalba
Al Ain
UNITED ARAB
EMIRATES
Iran
SaudiArabia
Iraq
Kuwait
Qatar
UAE
ArabianSea
AFRICA
Al Matri A. S. 2008
Climate
The UAE has an arid to semi-arid climate with high
temperature and infrequent irregular low rainfall .
Mean max. temperature reach > 40 o C in summer .
High relative humidity ( reaches > 97 % ) .
Average daily evaporation 8.2 mm .
Average annual mean rainfall is around 115 mm .
Al Matri A. S. 2008
GEOMORPHOLOGY AND GEOLOGY
The geomorphic features have a major role incontrolling the movement of both surface andgroundwater. Geology, on the other hand,encompasses the distribution of outcrops,stratigraphic sequences, and structural zones.These greatly influence runoff volumes, infiltrationrates and surface and groundwater quality. Thefollowing discussion outlines the main geomorphicfeatures in UAE, geologic setting, and structuralelements.
Al Matri A. S. 2008
The Main Geomorphic Features in the UAE
52o 53o 54o 55o 56o
25o
24o
23o
50 km
OMAN
ARABIA
UNITED ARAB
EMIRATES
Arabian Gulf
Abu Dhabi
Dubai
Ras Al Khaimah
Gulf
of
Om
an
N
Diba
Kalba
Al Ain
MountainsGravel PlainsLinear Dunes, Star Dunes and Playa DepositsAncient and Recent DunesCoastal Sabkhas
Al Matri A. S. 2008
Geologic Setting
• The northern Oman Mountains in UAE are composed of two major classes of rocks . The first is an authothonous sequence including Proterzoic basement rocks and some early Paleozoic sediments covered transgessively by carbonate platform deposits ranging in age from late Permian to late Cretaceous, and two allochthonous sequences. The lower sequence is composed of sedimentary rocks and is known as the Hawaina Group. This sequence is overlain by the Semail Suite, which consists of a slab of former oceanic crust . The Maastrichtian to Neogene sediments was laid down after the main episode of nappe emplacement. The actual relief of the Oman Mountains is due to tectonic movements that occurred during “post-nappes” times, i.e. during the Cenozoic. These movements resulted in the uplifting of the mountains.
Limestone, Marl and SandstoneSemail OphioliteHawasina ComplexMusndam Limestone
Hith Anhydrite and arab Formatin
Triassic and Permian Rocks
QUATERNARY
TERTIARY
CRETACEOUS
JURRASSIC
TRIASSIC
Al Matri A. S. 2008
Geologic Structure
The UAE can be differentiated into five structural
provinces, from north to south, including: Ru’us Al Gibal,
Diba zone, ophiolite sequence, wadi Hatta zone, and the
western area .
Ru’us Al Gibal area is characterized by thrust faults that
are inclined in the east and south directions. Sometimes
the thrust plain slopes towards east to the zone of
overturned and recumbent folds.
The Diba zone is a topographically low and extends for 30
km from northeast to southwest, with an average width of
20 km.
Al Matri A. S. 2008
Geologic Structure
The UAE can be differentiated into five structuralprovinces, from north to south, including: Ru’us AlGibal, Diba zone, ophiolite sequence, wadi Hattazone, and the western area .
Ru’us Al Gibal area is characterized by thrust faultsthat are inclined in the east and south directions.Sometimes the thrust plain slopes towards east tothe zone of overturned and recumbent folds.
The Diba zone is a topographically low and extendsfor 30 km from northeast to southwest, with anaverage width of 20 km.
Al Matri A. S. 2008
Major Drainage Basins
56o
26o
OMAN
Shaam
N
UNITED
ARAB
EMIRATES
Ras Al Khaimah
Ajman
Dubai
Diba
Gulf
of
Oman
Arabian
Gulf
25o
Sharjah
Fujairah
Kalba
Khor Fakkan
OMAN
Umm Al Quwain
1
2
18
3
419
13
1424
27
17
22
8
12
23
15
16
10
9
7
6 5
WaterDivide
55o 56o
26o
25o
24o
OMAN
ShaamN
UNITED
ARAB
EMIRATES
Ras Al Khaimah
Umm Al Quwain
Ajman
Sharjah
Dubai
Diba
Fujairah
Kalba
Gulf
of
Oman
Arabian
Gulf
OMAN
FoldFaultThrust FaultFracture
Main Geologic Structures
Al Matri A. S. 2008
Water Resources
> ConventionalSurface runoff : 25 main wadies with average runoff 185 MCM
Groundwater : The groundwater is main resource for agriculture.