Assessment of continuous flow application in Nekla Canal command area

Abstract EN

This study summarizes the results of application of continuous flow at Nekla branch canal level, in Mahmodia District Egypt.

These results constituted a part of an integrated Management Plan that was prepared and conducted by Enhanced Water Resources Management Project, Ministry of Water Resources and Irrigation (MWRI) to complete the technical evaluation of the Irrigation Improvement Project (IIIMP).

Part of the evaluation study is built on measuring specific indicators like ; Uniformity of water levels along the canal, Adequacy of flow rates , reliability of applying CF at the head gate, Compare abstracted volumes, No.

of violations and complaints, and crop production change per fed.

The evaluation also is conducted on Mesqa level to assess the targets of the improvement project, which might be affected due to inappropriate operation of the system.

The monitoring results showed that there is a reasonable equity, in water distribution among mesqas along the canal all over the monitored period.

Although the first reach of the canal always enjoyed higher water pumping(in m3/fed/day) during most of the weeks, the average weekly difference in pumped water was about 10% between head and both middle & tail reaches.

Also the water equity in terms of actual availability of head and water depths (with respect to the design ones), the analysis revealed reasonable equity in water level variations for most of the monitored period.

However, water depths at tail end were not fully satisfied during the period of peak water requirements.

But at the end of the season, when water demands are less than that at peak period, water depth at the tail end had improved significantly.

Moreover the study concluded that the adequacy of pumped water for the whole canal is about 99%.

This explains why the district did not receive complaints.

The average adequacy ratio of water supplied to the head reach equals 106.7% (meaning excessive water supplies), and was less than 100% during 9 weeks.

The average adequacy ratio of water supplied to the middle and tail reaches is almost the same and equals 96%.