The error in the discharge coefficient (including C,) of a rectangular profile weir, con- structed with reasonable care and skill, may be obtained from the equation. Weirs in the irrigation system of The Fayoum Governorate in Egypt have been modified: crests have been widened and pipes have been installed. As a result. Weirs in the irrigation system of The Fayoum Governorate in Egypt have been Hydraulic theory on flow over weirs and through pipes was subsequently used.

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Therefore we carry the 2nd experiment.

Determination of the uplift diagram. Lane suggested that a weight of three should be given to vertical creep and a weight of one to horizontal creep. For lands having mild weirss or flat lands. T he length of the seepage path transversed by the water is known as the length of creep percolation length. Flow of Water in a Channel is controlled either by: Reducing the hydraulic slope gradient in a canal if canal water slope is greater than the allowable water slope.


Percolation length creep length is the length to dissipate the total hydraulic pressure on the structure.

Objectives of Wei rs in I rrigation Canals. For lands having steep slopes Regulators: Actual percolation length is smaller than designed. Design of Weirs is divided to 3 parts: Water percolation length takes a short cut from a to b. Classification According to Crest Length B. Two weirs have to be constructed at the entrance of each canal.

Percolation is the flow of water under the ground surface due to an applied differential head. Structural Design Empirical Dimensioning — check of stability.

Seepage or percolation below weirs on previous soils: Of soil under water. Classification of Weirs According to Geometrical Shape.

Bligh supposed that the dissipation of head per unit length of creep is constant throughout the seepage path. Percolation length is the path length from a to b. Reducing head on existing structures.

For proper Design of Water Structures: Hydraulic Design determination of crest level and weir length according to head. Collecting sediments at US of structures sand strap. The scour continues until the energy of the flowing water reaches the normal channel energy.


Fayoum Weir Drawing • Topic •

III — Detailed Drawings. Soil i cr F. Scour may be defined as deepening and widening of water channel under the influence of the flowing water with high velocities. Classification According to Position in Plan. Proper distribution of water carried by a main canal among the branch canals depending upon it.

H n varies until H critical soil particles begin to move.

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For lands having steep slopes. Design head H is the biggest of 12and 3. Determination of Percolation Fayou To determine the critical head: Weirs for reducing water slope in steep lands. Undermining Piping is to carry away wash soil particles with flowing water below the ground surface causing collapse or failure of the above structure.

I- Hydraulic Design of Weirs. Ability of fayoun to move in the soil under certain head dimensions of velocity. Must cause minimum Loss in Head.