تقييم دور نهر ام المعارك في تنمية الموارد المائية
Author name:
صفاء عبد الامير رشم الاسدي
Supervisor name:
حمدان باجي نوماس
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:
10T1333 - p.pdf
Abstract:
Water is considered as a strategic resource for economic development.Thus , Um Al - Maark possesses considerable development of water resources in the lower Euphrates basin. The river takes from the right bank of the Euphrates (10) kms downstream ofNasiriya with a total length of (108) kms. There are five canals branching from the right bank of the river each with a capacity of 25 cumers. The river controls 60 - 65 % (185) cumecs (5,82) bcm of the Euphrates discharge at Nasiriya ( 199) - 1998). Its water discharge is affected by seepage losses with (0.45 - 0.55 ) m3 I m1 I day and evaporation from the channel with (0.04) bcm, due to high average temperature (24.6) °C and very high soil permeability (15 - 43) m/d.Um Al - Maark plays a vital role in water resources conservation by controlling water distorted at the Marches and Arabian Gulf and directed to the western desert to irrigate (150000) ha. Furthermore, the river maintains the Euphrates and Shatt Al - Arab water quality by limiting the Marshes polluted wat : - r with an EC value (6) mmhos I cm which increased water 11 salinity of the river's at Qurna to ( 5.1) mmhos I cm during ( 1990 - 1992 ) COIDJ - 'dred to the previous salinity 0.96 ( 1967 - 1969). The water quality of the rivers has been decreased to (2.3) and (2.6) mmhos I cm ( 1995 - 2000) at Qurna and Maqil respectively, as a result of the implementation of Um Al - Maark, Saddam and Al - Ezz rivers.UM Al - Maark will be used as flood control system. It will be able to convert (508) cumecs from the flood water to the western desert as in 1988 and up to now to be used for irrigation and artificial groundwater recharge.These will maintain environment system. The ri·.'er promotes considerable economic and environmental developments forward by utilizing the desert virgin land with (150000) ha.The present irrigated land is (6250) ha, producing (3525) tons. This will L increase to (580800) tons/year with a net value of (77190) MIDS (38.6) M$Um Al - Maark is an important system for artificial groundwater rech?.rge in the Dibdibba area which has a rapid agriculture development affecting groundwater storage due to increasing demands and low natural recharge with (0.63) and (0.31) bcrn respectively. As a result the groundwater level decrease to (0.25) m I year and salinity increases to ( 0.28) mrnhos I cm I year. Therefore,Um Al - Maark is constructed to feed groundwater with (l.35) hem. This increases the groundwate r level and decreases salinity by (0.8) m/year and (0.4 )mrnhos /cm/ year respectively.Thus the river maintains water efficiency to cope with future development. Finally , to implement the river objectives the following measuresshould be considered : l. It is necessary to construct two regulators on Um Al - Maark and the Euphrates.2. An Authority should be established to be responsible for sand dunes control , lining canals,hydrological , geological , climate , soil and natural vegetation information.3. Effective irrigation methods should be applied. 4. High agriculture intensity should be used.5. Farm management practics regarding training , machinery , irriga.ion , ,drainage , fertilizer... etc should be enhanced.6. Water should be well distributed between the river canals and lining should be adopted7. Studies regarding water and land resources should be enlarged.8. Agricultural facilities such as roads , electricity , machinery , health centers and education should be considered.9. Vegetation cover should be improved.
