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Register a new userCalculating Transmissivity Values by Using Data Related to Water Balance of Aquifer
تحديد الناقلية المائية باستخدام معطيات الموازنة المائية للطبقة الحاملة للمياه
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Damascus University ورقة بحثية
Publication date
2001
fields
Geology
and research's language is
العربية
Authors
أحمد محمد محمد( باحث )
Created by
Shamra Editor
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يتضمن هذا البحث مناقشة طريقة تعيين الناقلية المائية باستخدام معطيات الموازنة المائية للنموذج الطبيعي للطبقة الحاملة للمياه، و ذلك بغية تحديد قيم هذه الناقلية على مساحات شاسعة من أجل رسم خرائط الناقلية المائية الإقليمية. و تقوم هذه الطريقة على أساس استقرار العلاقة بين الناقلية المائية و كمية التغذية الطبيعية في حالة الحركة المستقرة و هذه تجد انعكاسًا لها بالسطح البيزومتري للمياه المضغوطة و عمق توضع مستوى المياه الحرة. و ما من شك في أن تعيين قيم الناقلية و من ثم إنشاء خرائط الناقلية المائية بهذه الطريقة يملك أهمية تطبيقية كبيرة و خاصة عند نمذجة المسائل الهيدروجيولجية المعقدة، حيث تسمح بإيضاح و تدقيق أماكن انتشار التخلعات التكتونية الخفية و تعيين مناطق التغذية و الصرف، و إيضاح تغير الخواص الرشحية للصخور و غيرها. هذا و إن النتائج التي تم الحصول عليها تتوافق توافقًا جيدًا مع الخصائص الجيولوجية – البنيوية و الليتولوجية – السحنية لمنطقة الدراسة.
This research discuss the method followed to specify water transmissivity; using the water balance data related to the natural model of aquifer; in order to pinpoint this transmissivity values on vast areas and; therefore; drawing of the regional water transmissivity This method is based on the steady relation between water transmissivity and the amount of natural charging is case of constant motion that is reflected on the piezometeric surface of the artesian water and the depth of water level with regard to free aquatic. Undoubtfuly, pinpointing transmissivity values and then drawing charts of regional water transmissivity depending on this method have a great significance practically, especially when complicated hydrogeological conditions are modeled. All the places of hidden tectonic dislocations can be clarified and scrutinized, bicides, there is then an ability to specify all charging and discharging areas, and explain the transformation of rock characters. Over, and above, all the results attained correspond with the geological, structural, and lythological characteristics of studied area.
References used
غافيتش،أ. ك ١٩٨٠ – نظرية وتطبيق استخدام النمذجة في الهيدروجيولوجيا(بالروسية)، نيدرا، موسكو.
محمد، أحمد محمد ( ١٩٨٦ ) قوانين تشكل الاحتياطي الطبيعي للمياه الجوفية في اللافات البركانية المتوضعة في الجزء الجنوبي الغربي من سورية وآفاق استخدامه في الاقتصاد الوطني. أطروحة دكتوراه، موسكو.
DOMENICO. P.A. ١٩٧٢ –Concepts and models in ground water hydrology. McGraw-Hill Book company, New York
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This research discusses the way of defining hydogeological parameters by using
monitored data of the ground water system, for defining the values of these coefficients on
large areas, which has a practical significance especially in modeling the hy
drogeological
problems which allows explaining and checking the hydrodynamic and the
hydrogeological structures of the area and the reasons of changing the filteration properties
of the aquifer.
It appears that transmissivity varied from 36 to 570 m2/day, the permeability
from 1 to 53 m/day, and the water yield from low to medium between 0.00004 and 0.2
because of the rising of the coefficient of diffusion.
The filtration recharge approximately from 1 - 40% from the rain falls.
The obtained results are in good conformity with the geological characteristics -
structural and litologic - facies characteristics for the study area.
Many chemical compounds (bases, inorganic acids, salts) have been used to find a suitable
solvent for vanadium oxide And determine optimal conditions for its Dissolution.The best
of them was sodium hydroxide at 2M concentration. The solubility was
100% at 90 °C and
the solubilitys time was 30 min. The number of motor cycles was 800 cycles / min and the
liquid / solid ratio was 200 g / L.
In addition,the best amino protonadted compounds were used to precipitate vanadates from
their solutions (monoethanolamine, diphenylamine, hydrazine, hydroxide amine
hydrochloride, urea) with several inorganic acids (HCl, H2SO4, HNO3) and 1: 1 acid/base
was monoethanolamine protonated with concentrated sulfur acid .
Analysis study was done to explain the effect of the
longitudinal section on the values of pressure of the water
hammer resulting from the trip of pumps, which results a low
pressure wave often lead to get cavitation, has been shown from
the anal
ytical study of several profiles and compare the results,
that the shape of the profile and the level of the pressure line
after the stopping of pumps determines the type of cavitation
formed , the region in which it occurs and the pressure values
resulting from it, when the profile doesn’t contain bends or the
bends are below the level of line pressure a distributed
cavitation is occurred, In the case of the presence of high points
, the effect of the bend is linked to several factors:
1 - the greater the height of the bend above line pressure increases the possibility for column separation and increases the pressure
forces.
2 –the pressure forces increase whenever the bend closer to the pumps.
This research aims to shed a light on the distinctive economic characteristics of water
resources and to identify the reasons that led to increasing interest in studying these
resources and their economics.
depending on descriptive analytical meth
od through characterization of what is and
analyze it, The researcher is addressing the policies necessary to be followed for a
successful allocation of water balances within the time periods, and define whether the
water resources are to be considered as an economical good and whether they are subjected
to market mechanisms, i.e. demand and supply.
the research results pointed out to the fact that the water resource is a strategic vital
resource and an economic good has a special nature which make it not subject to market
mechanisms.
this study is providing a number of proposals that emphasize the need to focus on the
economics of water resources to attain the efficiency of resource exploitation, which, on
the one hand, leads to achieving sustainability of this valuable resource, and on the other
hand fulfill maintain the economic development.
اقتصاديات الحجم
الموارد المائية المتجددة
النّدرة النّسبية للموارد المائية
النّضوب الاقتصادي
الاحتكار الطّبيعي
الطّلب على المياه
مرونة الطّلب السّعرية للماء
Renewable water resources
The relative scarcity of water resources
Economic depletion
Natural monopoly
Economies of scale
The demand for water
Price elasticity of demand for water
المزيد..
Results of this research which had been done by hydrogeological and geoelectrical survey for fresh water resources in the study region (wells and springs) show that the fundamental aquifer of underground water in AL-SIN region belongs to Jurassic. Th
e alimentary basin of AL-SIN spring depend upon filtration of rain water and snow throw Jurassic formation from north and north–east of basin. Direction of underground water circulation on west and south-west where we find flow place of AL-SIN spring and submarine springs near seashore.
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