الامداد المستدام للمياه 1 2
TRANSCRIPT
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Basic of Hydrogeolog
yDr .
Mohamed Kamel Fattah
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الموارد المائية واستخداماتها فى مصر
الم&ورد الرئيس&ى للمي&اه فى مص&ر ه&و نه&ر من الموارد المائية % ٩٦يمثل حوالى حيثالني&ل
المتجددة فى مصر حسب اتفاقية االنتفاع الكامل ١٩٥٩مصر والسودان لعام لمياه نهر النيل بين
2ا على حيث تحصل مصر سنوي- ١٨,٥ والسودان ٣ مليار متر ٥٥,٥ 1
٣مليار متر
السواحل بعض األمطار الموسمية على 2 - مليار ١,٣بحوالى تقدر وسيناء والتى
فى السنة٣ متر وإضافة إلى ذلك توجد كميات من المياه 3 -
لمتجددة وغير المتجددة الجوفية . فى الصحارى
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0ٍSources 1990Billion m3/year
2005Billion m3/year
River Nile Water 55.5 55.8
Groundwater 2.6 5.1
Agric. drainage water 4.7 8.0
Treated municipal
sewage water
0.2 2.1
Saving flow water
management programs
0 1.8
Deep groundwater
(desert(
0.5 3.2
Total
63.5 76.0
Water resources
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Water DemandWater Demand
0ٍSources1990
Billion m3/year
2005
Billion m3/year
Irrigation47.764.1
Municipal use3.13.7
Industrial use4.67.1
Navigation and regulation
Total
1.8
57.2
1.3
76.2
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World water distributionWorld water distribution
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Water cycle
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The Earth's waterThe Earth's waterNearly all (Nearly all (about 98%)about 98%) of the Earth's water is of the Earth's water is
contained contained in the oceansin the oceans. A tiny amount is . A tiny amount is locked away as locked away as ice sheets and glaciersice sheets and glaciers. This . This
leaves a very small amount which travels around leaves a very small amount which travels around in our water cycle,in our water cycle,
98% Salt water98% Salt water2% Fresh water2% Fresh water
(87% ice ware , 12% groundwater (87% ice ware , 12% groundwater and 1% River and Lakeand 1% River and Lake ) )
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Stages of the water Stages of the water cyclecycle
Stage 1The first stage of the water cycle is when moisture from the sea and plants is lifted into the atmosphere. As the sun beats down it warms the oceans, rivers and lakes. This causes the water to rise into the air as water vapour. This process is known as evaporation. A tiny amount of moisture is also released from trees and plants. This is known as transpiration
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Stage 2
As the water vapour rises in the atmosphere, it cools and condenses, forming clouds. This process is known as condensation. It is the same process that makes you see your breath on a cold winter morning. The clouds will then produce rain or snow (known as precipitation) which returns to the Earth's surface as water. The cycle then starts all over again.
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Stage 3
Only about three quarters of the rain which falls back to Earth lands in the oceans. This is much less than leaves in the first place. The remaining water makes only a slow return to the oceans. Most is locked up in glaciers and icebergs and can take several thousands of years to complete its
cycle..
The remaining water runs slowly overground, seeps into the ground or is taken up by plants as the cycle begins again
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Evaporation: Evaporation is when the sun heats up water in rivers or lakes or the ocean and turns it into vapor or steam. The water vapor or steam leaves the river, lake or ocean and goes into the air
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Condensation:
Water vapor in the air gets cold and changes back into liquid, forming clouds. This is called condensation
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Precipitation:
Precipitation occurs when so much water has condensed that the air cannot hold it anymore. The clouds get heavy and water falls back to the earth in the form of rain, hail, sleet or snow.
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Collection:
When water falls back to earth as precipitation, it may fall back in
1- the oceans, lakes or rivers
2- it may end up on land.
When it ends up on land, it will either soak into the earth and become part of the “ground water” or run over the soil and collect in the oceans, lakes or rivers where the cycle starts where plants and animals use to drink.