Neveen Yousif

Ain Shams University · Irrigation& Hydraulic

This study evaluates the effect of the piano key weir’s (PKW) shape and type on the flow efficiency for different inlet and outlet keys width ratios (Wi/Wo). The study is performed experimentally and numerically using a CFD model. Three PKW shapes are studied (rectangular, trapezoidal, and triangular). First, three Type-A shapes were studied experi...

Local scour is the most significant cause of bridge failure. Providing a short abutment with a straight slot has proved to be an effective method for reducing scour at this abutment. In this study, laboratory experiments have been conducted to investigate the effectiveness of using L-shaped slots in comparison to the commonly used straight slot, on...

This research investigates the effect of downstream drain's geometry on seepage through homogeneous earth dams founded on an impervious foundation. A permeability tank experimental model and SEEP2D numerical model are used in the study. The dam's failure in the case of no drain is experimentally observed to point out the drain's importance. The eff...

Designing a curved corner trapezoidal channel section with a minimal cost, which is the study's objective function, encloses minimizing the channel lining and excavation costs. The discharge, as the prime constraint, and the permissible velocities, as subsidiary constraints were considered to solve the problem. Mathematical optimization was used to...

The construction of the High Aswan Dam in Egypt led to reducing the solid suspension in water from more than 3,500 p.p.m. to less than 100 p.p.m. As the regime of Egyptian canals has been changed completely after the construction of the High Aswan Dam, the previous derived equations are not applicable anymore, and using them leads to a shortage in...

There is a big shortage of drinking water in the western Suez Gulf in Egypt. Fortunately, wind energy is available to cope with the required power for desalination. In previous works the area was subjected to Multi-Criteria Analysis process using a DEM implemented into a GIS environment. For each watershed, a Weighted Standardized Risk Factor (WSRF...

In this paper a 2D finite element model (SEEP 2D) is implemented to study the actual head loss along the sheet piles fixed at the ends of an apron of a heading up structure. Different scenarios for the thickness of the pervious layer under the apron, the length of the apron and the depths of the upstream and downstream sheet piles are studied. Resu...

Weirs may be used to control the discharge, decrease the water slope in canals and to distribute water between canals for irrigation, etc. The objective of this research was to investigate the influence of using one opening or more in weirs on discharge coefficient (Cd), the hydraulic jump characteristics and velocity distribution downstream of the...

Appurtenances are used downstream of hydraulic structures to reduce the length of the stilling basin which should be long enough for the flow pattern to regain its normal behavior and prevent the scour and erosion downstream those structures. Experimental study was carried out for testing a new shape of roughness elements (U-shape) and finding out...

The stilling basins are commonly used to dissipate the energy and protect the downstream floor from erosion. The aim of the present experimental work is to improve the roughened stilling basin using T-shape roughness instead of the regular cubic one and design this new shape. As a result of the present work the best intensity and the best roughness...

In this research, an electrolytic tank is used to study the effect of using a perforated blanket downstream the aprons of heading-up structures on the safety against piping through making different scenarios for length of blanket, intensity of perforations and presence of cutoffs. The study lead to conclude that when a blanket is added downstream t...