Manhole cover is an important device of urban drainage infrastructures. The hydraulic characteristics turbine-type manhole covers were studied through numerical simulations and physical experiments. flow field water surface investigated. process divided into two parts: free regime submerged regime. Numerical experimental results are in good agreement. It indicated that the depth constant later ...

Sodic soil is one of the most common problems of limiting agricultural production that related on irrigation. Saturated hydraulic conductivity is one of hydrodynamic characteristics in evaluating transmission flow through underground levels. To investigate the role of increment of exchangeable sodium in hydraulic conductivity changes (as characterized by the mobility of water in soil) an experi...

Sodic soil is one of the most common problems of limiting agricultural production that related on irrigation. Saturated hydraulic conductivity is one of hydrodynamic characteristics in evaluating transmission flow through underground levels. To investigate the role of increment of exchangeable sodium in hydraulic conductivity changes (as characterized by the mobility of water in soil) an experi...