Amgad Elansary

Debris flows affecting highways and plugging a storm culverts always cause overtopping of the road by sliding debris causing increase of the total head losses. The experimental study in this research aims to examine the effect of the cross sectional plugging percentage on the total energy (total head) loss. A storm pipe culvert was tested for five different discharges (Q=8.5 to 38.8 lit. /sec), different submergence ratios (Y2/d = 1.0, 1.5, and 2.0), fixed longitudinal plugging length ((Lr) = 50%), and different cross sectional plugging percentage (Ar = (0%, 10%, 30%, 50%). Results of the study estimate the risk of road failure, predict implications of relatively high flows, and identify culverts that need to be replaced. Increasing the cross sectional plugging (Ar) from 10% to 50% led to rise in the increasing factor of the relative energy head loss by about 103 % at Y2/d=1.0, and by about 136 % at Y2 …

Debris flows affecting highways and plugging a storm culverts always cause overtopping of the road by sliding debris causing increase of the total head losses. The experimental study in this research aims to examine the effect of the cross sectional plugging percentage on the total energy (total head) loss. A storm pipe culvert was tested for five different discharges (Q=8.5 to 38.8 lit. /sec), different submergence ratios (Y2/d = 1.0, 1.5, and 2.0), fixed longitudinal plugging length ((Lr) = 50%), and different cross sectional plugging percentage (Ar = (0%, 10%, 30%, 50%). Results of the study estimate the risk of road failure, predict implications of relatively high flows, and identify culverts that need to be replaced. Increasing the cross sectional plugging (Ar) from 10% to 50% led to rise in the increasing factor of the relative energy head loss by about 103 % at Y2/d=1.0, and by about 136 % at Y2 …

The Egyptian government is replacing the existing Naga Hammadi barrage, located across the Nile River some 450 km south of Cairo, with the New Naga Hammadi barrage (NNHB) to incorporate a hydropower plant and to improve conditions for river traffic. The new structure will lead to an increase in river water levels, both locally near the new barrage and upstream. The rise in river water levels will in turn result in changes in groundwater levels in the aquifer system up and downstream of the barrages. In this paper, an area is chosen, which is expected to suffer from a high groundwater table after the construction of the NNHB, to investigate the problem and propose alternatives for lowering the groundwater levels. The study area is a village called Bakhaness, with an area of 588 ha. It is located some 1.5 km upstream of the NNHB. A computer model (MicroFEM) has been used to simulate the groundwater …