الفهرس 
LITERATURE REVIEWOnly 14 pages are availabe for public view
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Abstract
The primary purpose of barrages is to raise the river water level and so
provide additional head to the irrigation canals supplying the cultivated
areas in Upper Egypt.
The Ministry of Water Recourses and Irrigation (MWRI) is constructing
new barrages to replace the existing structures and so ensure the
continued supply of water to the large irrigation areas downstream, and
the new barrages incorporate a hydropower annex utilize the natural
resource of the Nile River for hydropower generation, finally improve the
navigation in the Nile River by constructed new locks.
For any new barrage there are probable negative impacts such as:
Inundation of Agricultural land on river islands and areas adjacent
to the river by overtopping.
Impacts on river morphology by erosion and sedimentation.
This research will focus on studying the environmental hydraulic impacts
such as erosion, sedimentation and overtopping. For studying these
impacts study area on the Nile river is determined between Esna barrage
and Naga Hammadi barrage (192 km), at the period from 1982 to 2005 .
Two main sets of data were used in the analysis, included the contour
maps for the Nile River bed between Esna and Naga Hanmmadi barrages
for the year 1982 and 2005. Cross sections were deducted from these
maps at space of 4 kilometers. These cross sections were used to compare
the 1982 and 2005 cross sections in order to calculate erosion and
sedimentation quantities of 26 cross sections which are selected along the
study reach. On the other hand, cross sections of year 1982 were input to
the numerical model GSTARS .2 in order to predict the flow stage
corresponding to different discharges along the reach and sediment
routing was performed. Finally, 2005 cross sections were used to develop
water surface profile and to map the overtopping areas by future
discharge of 4051m3/s using topographic maps. 16 sectors were affected
by overtopping and it could be noted that the total areas are 792.32
feddans were mapped .