The Effect of Hydraulic Structure on Aeration Performance Case Study: Stepped Cascade with End Sill

Abstract

Cascade aeration has been utilized as a hydraulic structure for years which  has proven to be the least costly aeration system in replenishing dissolved oxygen. The aeration performance of the cascade structure with end sill has been investigated in a large laboratory cascade structure  which has been  designed and constructed at Al- Mustansiriya university in environmental hydraulic  .An empirical equation to  predicting the oxygen transfer efficiency   for different models of cascade structure with end sill was correlated. The results indicated that l/h and s/h were a significant effect on the aeration efficiency of cascade structure.

Keywords: Hydraulic structure, Stepped cascade , End sill ,Aeration, Oxygen transfer