Design of canals in alluvial soils

Conclusions

• 1. The morphometric method of estimating the geometry of stable canal channels, as based on a deeper physical nature and using the fluvial process theory principle, has become most popular in solving the problem of designing canals in alluvial soil. It can be considered that sufficiently reliable relations have presently been obtained which can be used in practice with consideration of the particular canal operating conditions.

• 2. More detailed investigations of the separate consideration of the transport of bottom and suspended sediments on stability for providing channel stability of canals when v≥v_ne are needed for refining the morphometric relations.

• 3. It is necessary to continue investigations of the effect of the sediment concentration of a flow on the velocity structure of the flow and noneroding velocity.

• 4. It is necessary to consider as one of the most important problems of open-channel hydraulics the activation of experimental and theoretical investigations of the three-dimensional turbulent structure of a flow for the purpose of estimating the distributon of local velocities in the flow cross section as a function of the size of the channel and roughness of its walls.

• 5. For dynamically stable canal channels investigations are needed for estimating the roughness coefficient as a function of the channel size β, shape, sediment concentration of the flow, and bed-load transport.

• 6. It is necessary to prepare the relevant materials for compiling standard data on the design of dynamically stable canals.