الفهرس 
chapter 1Only 14 pages are availabe for public view
 |  | from | 240 |  |  |
| | | from | 240 | | |
Abstract
The present study covers the area in the North of El-Sharkia
governorate. This area is known to be suffered from irrigation problems
and the farmers always complain about irrigation issues. Irrigation
networks often are seen to perform below the expectation level, requiring
rehabilitation. Unfortunately, rehabilitation works are taken up on a
piece-meal basis. The main object for rehabilitation is to improve
conveyance efficiency, reliability and durability of the system so as to
provide irrigation water to the beneficiaries in a more sustainable and
equitable manner. The objectives of this study are to investigate the
causes for water shortage in canals tails and perform rehabilitation for
sections to improve the hydraulic performance. Questionnaires for both
engineers and beneficiaries approved many reasons including need for
rehabilitation behind the inefficiency of irrigation canals performance. A
computer program is used to choose the best solution to achieve water
balance. The CCHE-GUI 3.29 program is used to in a case study (El-
Bateekh canal), which approved the inefficiency of the canal to deliver
the required discharges. Rehabilitation and remodeling of the canal both
improved conveyance efficiency for the same discharge. The velocity
magnitudes and sedimentation (bed changes) for the sections at (0 km,
2km, 4 km. 6 km, 8 km and 8.3 km) of El-Bateekh canal are obtained
numerically using the program for six cases. The rehabilitation cost of El-
Bateekh canal to achieve the best cross section is done.