The Juksan weir, installed in the Yeongsan river South Korea from 2010 to 2012, has secured sustainable water resources and helped control flooding. However, low flow velocities due weir have deteriorated quality of water. For natural restoration, gate was opened 2017. In this study, three-dimensional finite difference model Visual MODFLOW used analyze effects opening on stream–aquifer interact...

Labyrinth weirs have not a straight crest in the perpendicular direction to the flow. The plan view of the weir consists of multiple and broken linear crests that cause the increase of its effective length. The advantages of this type of weirs are higher discharge capacity, easy aeration as well as low fluctuations of water surface at the weir upstream. This paper deals with the simulation of t...

We investigate the x log x condition for a general (Crump–Mode– Jagers) multi-type branching process with arbitrary type space by constructing a size-biased population measure that relates to the ordinary population measure via the intrinsic martingale Wt. Sufficiency of the x log x condition for a non-degenerate limit of Wt is proved and conditions for necessity are investigated. GENERAL BRANC...

As a type of dam with long history and wide range in the construction water conservancy projects my country, weir dams have functions flood control, irrigation diversion. Due to limitation conditions environment at that time, treatment is not standardized enough, which leads different degrees problems dam. Based on example Shangmaji weir, article focuses analysis leakage damage mechanism propos...