Side weirs are used in open channels to control flood and the flow passing through it. Discharge capacity is one of the crucial hydraulic parameters of side weirs. The aim of this study is to determine the effect of the intended dimensionless parameters on predicting the discharge coefficient of triangular labyrinth side weir. MAPE, RMSE, and R2 statistic indexes have been used to assess the ac...

Stepped spillways have become a popular method for handling flood releases. The steps increase significantly the rate of energy dissipation taking place on the spillway face and reduce the size of the required downstream energy dissipation basin. The compatibility of stepped spillways with roller compacted concrete (RCC) and gabion construction techniques results in low additional cost for the ...

Coal mine backfilling can effectively prevent large-scale movement of rock formations, not only improving the overall production capacity but also protecting surface from destruction and maintaining original ecological environment. Backfilling extent backfills compactness are two factors determining supporting effect on overburdens in underground coal mines. To make full use aeolian sand as bac...

The stability of roadbed in seismic prone areas is vital for the sustainable economic development regions. gabion structures are one methods road strengthening. Gabion used to avoid damage under loads natural ground slope due earthquake or other reasons. This approach most economical and efficient solutions stabilization slopes, it as a drainage system. Field tests give precise results about ef...

In the present paper an almost-sure renewal theorem for branching random walks (BRWs) on the real line is formulated and established. The theorem constitutes a generalization of Nerman’s theorem on the almost-sure convergence of Malthus normed supercritical Crump–Mode–Jagers branching processes counted with general characteristic and Gatouras’ almost-sure renewal theorem for BRWs on a lattice.

abstract the groines are structures which are use to protected the river bank and to form the water way .the most important problem of groynes is scour at around it that makes breaking and overturning the groynes. because of the less researches at about l-head groynes and open groynes ,this article considers the amount of scour in this type of groynes. so because of this have been used the lace...

Additive Manufacturing (AM) offers a range of possibilities in fluid flow research. An existing 2.5 m open channel experiment contains set standard weirs which are limited design. This research will compare experimental AM (e.g. labyrinth, piano, catenary), that would not be possible on some laser-cut polymer or machined aluminium weirs. Due to the bespoke complex nature weirs’ design other man...

Enhancing wetland characteristics in agricultural drainage ditches with the use of low-grade weirs, has been identified as a best management practice (BMP) to mitigate nutrient runoff from agriculture landscapes. A major objective of utilizing low-grade weirs as a BMP includes fostering environments suitable for the biogeochemical removal of nitrogen via denitrification. This study examined the...

Crump et al. provide eight criteria for evaluating sentience in decapods, with scope application to other taxa. Their work has attracted the interest of policymakers. This commentary discusses limitations conceptual and legal acknowledgement chainging practice public attitudes. More is needed. Social science may be able help.