scholarly journals Optimum Groundwater Pumping Rate in Safwan-Zubair Area, Basrah Province, Using Simulated Annealing Technique

2018 ◽  
Vol 1 (4) ◽  
Author(s):  
Ali H. Al-Aboodi
Keyword(s):  
Simulated Annealing ◽  
Optimization Model ◽  
Western Desert ◽  
Specific Yield ◽  
The South ◽  
Pumping Rate ◽  
West Part ◽  
South Of Iraq ◽  
Sand And Gravel ◽  
Percentage Ratio

Safwan-Zubair area is located in the south –west part of Basrah Province in the south of Iraq, this area is involved within the Dibdibba plain which is considered as a part of Iraqi Western Desert. Dibdibba formation consists mainly from sand and gravel with some cementing materials like silt and clay, especially in the west of Zubair area. A linked simulation-optimization model for obtaining the optimum pumping rate of groundwater is presented in this paper. Processing Modflow for Windows (PMWIN v.5) is selected to simulate the aquifer behavior being studied. This model is integrated with an optimization model which is based on the simulated annealing (SA) technique. The calibrated values of hydraulic conductivity vary over the range (15-150) m/day; while, the calibrated values of specific yield vary over the range (0.125-0.45). The objective function converges to a maximum value of (0.636925E+8 m3/year). The percentage ratio of inactive wells is 10.9 %, many wells in the study area that occupy incorrect positions, these wells must be turn off for obtaining optimum pumping rate in the study area.

Trajectory Optimization Applied to Space Rendezvous

2013 ◽  
Vol 756-759 ◽  
pp. 3466-3470
Author(s):  
Xu Min Song ◽  
Qi Lin
Keyword(s):  
Simulated Annealing ◽  
Optimization Model ◽  
Trajectory Optimization ◽  
Optimization Problem ◽  
Optimization Method ◽  
Nonlinear Constraints ◽  
Design Variables ◽  
Adaptive Simulated Annealing ◽  
Simulation Results

The trajcetory plan problem of spece reandezvous mission was studied in this paper using nolinear optimization method. The optimization model was built based on the Hills equations. And by analysis property of the design variables, a transform was put forward , which eliminated the equation and nonlinear constraints as well as decreaseing the problem dimensions. The optimization problem was solved using Adaptive Simulated Annealing (ASA) method, and the rendezvous trajectory was designed.The method was validated by simulation results.

On the Occurrence of “Sand-Pipes” in the Magnesian Limestone of Durham

The Geologist ◽  
1860 ◽  
Vol 3 (8) ◽  
pp. 293-298
Author(s):  
J. W. Kirkby
Keyword(s):  
General Structure ◽  
The South ◽  
The Past ◽  
Sand And Gravel

During the past year my attention has been directed to some ourious tube-like cavities in the magnesian limestone near Sunderland, which I believe to be perfectly analogous to the sand- and gravel-pipes of the chalk districts of the south of England and France. And as our knowledge of such pipes has hitherto been almost confined to their occurrence in the chalk, I deem it advisable to describe these in the magnesian limestone; not that they add much to what we already know, or that they afford grounds for a new theory of the origin of sand-pipes, but because it is well that the occurrence of such as are found in other calcareous rocks than chalk should be recorded, and especially when in rocks which differ from the latter in general structure and greater hardness.

scholarly journals Contribution to the hydrogeology of Six Hills sandstone aquifer in East El-Oweinat area, south Western desert, Egypt

2019 ◽  
Vol 8 (3) ◽  
Author(s):  
Saad Younes Ghoubachi
Keyword(s):  
Cross Sections ◽  
Land Reclamation ◽  
Groundwater Resources ◽  
Western Desert ◽  
Pumping Rate ◽  
Groundwater Levels ◽  
Monitoring Wells ◽  
Sandstone Aquifer ◽  
Domestic Livestock ◽  
The Impact

El-Oweinat area is located in southwestern Egypt and is considered to be one of the new land reclamation projects in the Western Desert. The Nubian Sandstone aquifer has high potentiality and good groundwater quality. The results of geologic and hydrogeologic studies reveal that the Six Hills sandstone aquifer represents the sole groundwater resource used for all purposes (agriculture, drinking, domestic, livestock and poultry) in East El-Oweinat area. The Six Hills sandstone aquifer overlies directly the Precambrian basement rocks. The concerned aquifer exists under unconfined conditions as it is exposed on the surface. The hydrogeological cross sections show that the fully saturated thickness of the Six Hills sandstone aquifer ranges between 150.2 m and 651 m and increases towards the west. The groundwater generally flows towards the northeast direction with an average hydraulic gradient of 0.6 ‰. The calculated groundwater volume of the Six Hills sandstone aquifer in East El-Oweinat area (4,340 km2) reaches 350 bcm of fresh water. The comparison of the depth to water in the same monitoring wells during 14 years (2003 and 2016) reveals that the head decline rate in groundwater depths were ranging between 5 cm/year and 80 cm/year. The pumping rate increased from 600,000 m3/day in year 2003 to 3,600,000 m3/day in 2016. The average transmissivity attains 2,060 m2/day reflecting the high potential of the Six Hills sandstone aquifer in East El-Oweinat area. The groundwater flow model (MODFLOW) has been used to investigate the impact of groundwater withdrawal on groundwater levels for sustainable groundwater management. Four scenarios were applied to predict the probable head changes in the Six Hills sandstone aquifer and their impact on the availability of groundwater. The fourth scenario is recommended in order to sustain the groundwater resources in the study area and keep the drawdown rates in the range of 0.66 m/year through reducing the present discharging rates (10,000 m3/day/well) by about 40%.

Sign in / Sign up

Export Citation Format

Share Document