... in which air regulation is achieved through two pipes which dip into the surfaceof the headwater. Oneof these dip pipes admits air to the crown of the siphon passage, and the other admits air at the crest. This form of air admission produces good dispersion of air into the water flowing through the siphon...

...FZ EL SHIBINI; JR RYDZEWSKI Proc. Instn Civ. Engrs, Part 2, 1977, 63,Mar., 35-47 7987 Towards an optimal utilization of the water resources of the Nile Basin F. Z.EL-SHIBINI, BSC, MS, PhD* The Paperconsiders the problemof optimum allocationof water between irrigation and power at themain headwater...