Nile Water Science & Engineering Journal

VOLUMES

Volume: Special Editi Volume 12, 2019

Issue: Special Issue , 2019, October

Development River Channel Bathymetry at the Basin Scale for Hydraulic Modeling

On Monday, 25th of November, 2019. 07:21:52 PM
By heba elsersawy

Topic: River morphology
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Downloaded: 15

Abstract

Hydraulic modeling of rivers is important for estimating floods and assessing geomorphologic processes including sediment transport and riparian zone read more

Groundwater Management towards Increasing the Capabilities of Power Plant

On Thursday, 21st of November, 2019. 09:30:59 AM
By wedad saad morsy ahmed saleh

Topic: Hydropower Development
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Abstract Al-Shabab Power Plant located at Ismailiya Governorate, is fully dependent on desalinated groundwater for cooling as well as other utili read more

Abstract Al-Shabab Power Plant located at Ismailiya Governorate, is fully dependent on desalinated groundwater for cooling as well as other utilizations within the plant. Groundwater is pumped from eight wells distributed around the desalination tank. These wells are located in improper sites, the safe distance between these wells are not considered which affects the water potentiality and may affect negatively on the soil under the tank. Groundwater role will increase at future phase for converting existing simple cycle to combined cycle plant. Accordingly, there was a need to increase groundwater extraction rate, considering the safe distances between the recommended wells, to avoid interference, and safe suitable yield of groundwater for more than 40 years. The impacts on groundwater quantity and quality have been predicated due to increasing the amount of extraction for 40 years, considering five proposed scenarios. These scenarios were tested numerically, simulating for the process of different aquifer extraction with different proposed number of wells, and their locations. The evaluation of the scenarios is based on relative change in both drawdown, and salinity to test predictions about a ground-water system’s response to a stress and proposed the optimum wells distribution. The simulations were conducted using the numerical groundwater model package of Visual MODFLOW 4.2. The results showed that scenario No. 3, which was identified as two folds of the current groundwater extraction, was the optimum one, as it will provide minimum drawdown and minimum change in groundwater salinity. In this scenario a total of 17pump stations have been recommended to be used for water extraction with each station contains two wells. Stations were sited carefully, with a minimum distance of 30 meters between stations, and were designed to pump 1186 m3/ day. Field monitoring program for evaluating the proposed system was recommended to be carried out both qualitative and quantitative. less

Predicting and Improving Hydraulic Performance of Pumping Suction Intakes By Computational Fluid Dynamics (CFD).

On Monday, 11th of November, 2019. 10:14:47 AM
By Ashraf Ghanem

Topic:
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Downloaded: 7

Abstract

The disturbance in velocity distribution generates hydraulic instability of pumping units, which leads to failure, damage and other operation and mai read more

The disturbance in velocity distribution generates hydraulic instability of pumping units, which leads to failure, damage and other operation and maintenance difficulties. The objective of this research is to predict and enhance the hydraulic problems in the sump intake of FARASKOUR drainage pumping station on faraskour drain Damietta governorate. The first and fifth units of the operating, water were not analyzed, study of the hydraulic problems of the suction basin of the new pump station due to the sharp rotation in the suction guide from the sharp rotation to the quay station and the continuous discontinuation of the first and fifth units due to the lack of regular water entering the unit, and recommend the suitable modifications to eliminate the operations and maintenance costs. A numerical simulation was done to investigate the hydraulic stability of the station. There are four cases were done. The first case, when all units “five units” operates at the same time, the second case when three units operate “1, 2 and 3”, the third case when other three units “3, 4 and 5” operates, and the last case when three units operate “1, 3 and 5”. The ANSYS R18.1 flow simulation software, Computational Fluid Dynamics (CFD) is used to simulate the flow conditions at different working pumping units and different water levels to predict the hydraulic problem at the suction side. The results indicated that the problem of flow is due to the sharp bending of the suction channel at the entrance of the units to the station, leading to two negative phenomena, the first one not to distribute well to the incoming lines of the units, and the second is appearance of places of relatively low speeds. The internal bending of the stream just before the entry of units directly to this area negatively affects the work of units (4, 5) and the problem becomes more specific with the formation of depositions. In general, the results indicated that with five pumping units’ scenarios in operation appear dead zones in the inner curvature of the intake. From simulation results, the geometry of the intake is proper for running four parallel flow pumps with the designed flow rate and reduces the distance from both sides of the canal (make Protection basin). less

Python Based-Application for Predicting Nile River Morphology

On Thursday, 17th of October, 2019. 05:44:33 PM
By noha kamal

Topic: River morphology
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Downloaded: 8

Abstract

Morphological analysis is extremely important in the planning of Nile River sustainable development. It is necessary for navigation safety, intake str read more

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