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شط العرب : الخصائص الهيدرولوجية والاستثمارات المائية == Shatt - Al - Arab Hydro Logical Features And Water Exploitations
Author name:
صفية شاكر معتوق المطوري
Supervisor name:
حمدان باجي نوماس | منعم مجيد حمد الحمادة
General topic:
Geography
Specific topic:
Geography
Degree:
Master
University:
University Of Basrah - Faculty Of Education - Department Of Geography
Language:
Arabic
University location:
Basrah
First pages:
10T1386 - p.pdf
Abstract:
Shatt Al - Arab forms from the confluence of : rs main tributries the Tigris and Euphrates at Qurna. It occupies the lower part of the basin. It runs south - eastward to flow into the /\rab Gulf with 196 Km length and an average width of 500 m. The river depthvaries from 7 m at Fao to J 5 m in Basrah. Its total basin area is 909200 Krn2.The physical and human factors have agreate in flunce upon the geneual properties of water in the area. The geological struction itself has an influnce upon the river discharge throughout the seepage loses which take part in increasing the salt groundwater( approximately ( 8 - 64 ) m mhos I cm ) , in addition , the gentle slopes of the ground with an average of 0. 02 m I km decreased the river flow to ( approximately 0.55 m Is ).The dry climate with high temperatures approximately 24 , 8° C, low rainfall with an average annual of 142 mm and the interse evaporation 3090.51 mm , have their role in increasing the water losses from the river to 0.21 ~ill ion cubic meter ( bcm ).Furthermore , the human conditions inside and outside the country have their influnce upon the quantity and quality of water especially the upstream riparian basin states which take large scale development particularly in storage and irrigation. Also , the. traditional irrigation methods play a negative role in wasting and polluting water. Further , the increase in demanding wate1· for the different use aspects of improvements. The study of the hydrological properties indicate that the average water discharge reaches to 646 cumecs ( m3 I s ) ( 20.3 bcm ) for the period ( 1986 - 1998 ). Its water , discharge depends on its main tributaries : Tigris , Euphrates , Al - Sewib and Al - Eiz with an arerge annual of 168 , 151 , 105 , 222 cumecs Successively. It also depends on Al - Karon discharge with an average annual of 63 cumecs at present. The river discharge various yearly , seasonally and monthly depending on the water year properties , i.e. weather in is wet , neutral , or dry. Water levels vary also yearly ,seasonally and monthly depending on discharge and the influence of ebb and tide.The present study shows that Shatt - Al - Arab faces many problems such as the influence of storage projects and the exploitations of the upstream riparian states on water quantity and quality , the effect of different sorts of pollution. The area also suffers from lack of management staff in their duties and the absence of observation and association of the concerned authorities.Exploitation from all its sides proved that the present requirements controle 34.5 % of the available water. It was also revelied that the water budget in higher than the available water with an average surplus of 13.22 hem meanwhile , the area confronts future waher deficit as a result of the development in accomplishing irrigation and storage projects of the upstream basin states and Iraq which will reach to 82 bcm.
