IMPROVING EFFICIENCY OF OPEN CHANNEL BY REHABILITATING THE MOST EFFECTIVE REACHES

Abstract

The irrigation network in Egypt suffers from several hydraulic issues such as changing in canal geometry (scouring and siltation) which may have occurred due to faulty design or insufficient maintenance programs. That is why Al-Rayah Al-Tawfiky is selected for this research. A hydraulic surveying was conduct; using a high technology instrument to simulate the actual hydraulic efficiency for the area of study. Furthermore, identifying the main objectives of the research as determining the reaches of the canal, which need rehabilitation, based on the analysis of actual collected data, to deduce an empirical equation relating the hydraulic parameters, and to state the hydraulic effects of rehabilitating the most effective reaches on the hydraulic performance of Al-Rayah Al-Tawfiky. For this purpose, different rehabilitation scenarios were simulated using SOBEK1D model. The results for each scenario take into consideration water levels, velocities, and discharge at different locations along Al-Rayah Al-Tawfiky. An economic study is conducted to clarify the benefit from implementing the suggested rehabilitation works, besides comparing the economic income, and the rehabilitation costs. Chapter One:- This chapter includes a general introduction about the problem of the current research, and the influence of the cross section’s morphological changes on the hydraulic efficiency of the open channel. This chapter also involves the research objectives, besides the contents of the thesis. Chapter Two:- This chapter contains the literature review that deals with the research point “the hydraulic efficiency of open channel”, and the major hydraulic problems that affect on the performance of irrigation canals. In additional it reviews the impact of implementing the unsuitable maintenance programs on the irrigation network’s efficiency. This chapter also includes a chronology for the scientific researches, papers, theses, and previous studies that deals with the current research topic.