Papers by Ahmed Abozaid
There are three main parameters affecting on seawall crest level determination: tidal range, wave... more There are three main parameters affecting on seawall crest level determination: tidal range, wave run-up and sea level rising. In this paper, the hydrodynamic efficiency of a new type porous seawall is experimentally studied. This is by using physical models to minimize the run-up at the front of the wall. The seawall consists of front screen (steel screen suspended on nearly spaced piles), back solid wall and filled rock-core in between the two walls. The hydrodynamic efficiency of the seawall is presented as a function of the wave run-up, reflection, and energy dissipation coefficients. Different wave and structural parameters affecting the seawall efficiency are investigated. The results indicate that; the run-up and reflection coefficients decrease with increasing of relative wave length (h/L), wave steepness (Hi/L), relative porous media width (B/L) and porous media width-water depth ratio (B/h). The energy dissipation coefficient takes the opposite trend. The efficiency of the proposed porous seawall in reducing wave run-up and reflection coefficient is better than the impermeable type by about 10 to 25% and 20 to 40% respectively. In addition, it is better than the impermeable one in dissipating the incident wave energy by about 30 to 60%. The increasing of the porous media width helps in reducing the wave run-up and reflection coefficient and increasing the dissipated wave energy by about 5 to 10%, 10 to 20% and 5 to 20% respectively. The empirical equations are developed to estimate the run-up and reflection coefficients. The results of these equations compared with the experimental results and it give a reasonable agreement by about 80 to 90%.
The global mean surface temperature is projected to increase about 1-3.5 C by the year 2100 cause... more The global mean surface temperature is projected to increase about 1-3.5 C by the year 2100 caused in sea level rising by about 15-95 cm.
M. Sc. thesis by Ahmed Abozaid
Climate change is considered one of the hottest global environmental problems
facing the world c... more Climate change is considered one of the hottest global environmental problems
facing the world community. The sea level rising (SLR) is a associated phenomena to
this climate change. This phenomenon has directly affected on many sectors such as
water resources, coastal zones, agriculture, rangeland and livestock, human health,
human settlements, energy, forest and bio-diversity. Without serious adaptation
measures, millions of peoples will be displaced from their homes. In addition to the
loss of productive land will have serious implications on job opportunities, food
availability and population movement.
In this study, the hydrodynamic efficiency of a porous seawall, may be used in
protecting coasts from probable SLR, is experimentally studied using physical
models. The seawall consists of front steel screen, back solid wall and filled with
rock-core. A submerged breakwater with different parameters is installed in front of
the seawall to decrease the wave action on the seawall. The wave run-up, the wave
reflection and the wave transmission due to the seawall with or without the
submerged breakwater are investigated.
The main results are: the run-up and reflection coefficients due to the seawall
only decrease with increasing of the relative water depth (h/L), the wave steepness
(Hi
/L), the relative seawall width (b/h) and the seawall porosity (n). The submerged
breakwater decreases the run-up on the seawall and the wave reflection coefficients
by about 20-60% and 40-70% respectively. This means that the proposed system
significantly helps in reducing the wave run up on the seawall which facing the
probable sea level rise. In addition, the submerged breakwater is achieving low
transmission coefficients with increasing of the relative breakwater height (D/h) and
the relative breakwater width (B/h).
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Papers by Ahmed Abozaid
M. Sc. thesis by Ahmed Abozaid
facing the world community. The sea level rising (SLR) is a associated phenomena to
this climate change. This phenomenon has directly affected on many sectors such as
water resources, coastal zones, agriculture, rangeland and livestock, human health,
human settlements, energy, forest and bio-diversity. Without serious adaptation
measures, millions of peoples will be displaced from their homes. In addition to the
loss of productive land will have serious implications on job opportunities, food
availability and population movement.
In this study, the hydrodynamic efficiency of a porous seawall, may be used in
protecting coasts from probable SLR, is experimentally studied using physical
models. The seawall consists of front steel screen, back solid wall and filled with
rock-core. A submerged breakwater with different parameters is installed in front of
the seawall to decrease the wave action on the seawall. The wave run-up, the wave
reflection and the wave transmission due to the seawall with or without the
submerged breakwater are investigated.
The main results are: the run-up and reflection coefficients due to the seawall
only decrease with increasing of the relative water depth (h/L), the wave steepness
(Hi
/L), the relative seawall width (b/h) and the seawall porosity (n). The submerged
breakwater decreases the run-up on the seawall and the wave reflection coefficients
by about 20-60% and 40-70% respectively. This means that the proposed system
significantly helps in reducing the wave run up on the seawall which facing the
probable sea level rise. In addition, the submerged breakwater is achieving low
transmission coefficients with increasing of the relative breakwater height (D/h) and
the relative breakwater width (B/h).
facing the world community. The sea level rising (SLR) is a associated phenomena to
this climate change. This phenomenon has directly affected on many sectors such as
water resources, coastal zones, agriculture, rangeland and livestock, human health,
human settlements, energy, forest and bio-diversity. Without serious adaptation
measures, millions of peoples will be displaced from their homes. In addition to the
loss of productive land will have serious implications on job opportunities, food
availability and population movement.
In this study, the hydrodynamic efficiency of a porous seawall, may be used in
protecting coasts from probable SLR, is experimentally studied using physical
models. The seawall consists of front steel screen, back solid wall and filled with
rock-core. A submerged breakwater with different parameters is installed in front of
the seawall to decrease the wave action on the seawall. The wave run-up, the wave
reflection and the wave transmission due to the seawall with or without the
submerged breakwater are investigated.
The main results are: the run-up and reflection coefficients due to the seawall
only decrease with increasing of the relative water depth (h/L), the wave steepness
(Hi
/L), the relative seawall width (b/h) and the seawall porosity (n). The submerged
breakwater decreases the run-up on the seawall and the wave reflection coefficients
by about 20-60% and 40-70% respectively. This means that the proposed system
significantly helps in reducing the wave run up on the seawall which facing the
probable sea level rise. In addition, the submerged breakwater is achieving low
transmission coefficients with increasing of the relative breakwater height (D/h) and
the relative breakwater width (B/h).