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Studies On Hydraulic Jump In Prismatic And Non-Prismatic Channels hydraulic knockout tool hydraulic hole macking tool hydraulic punch tool syk 15 with the die range from 63mm to 114mm
Hydraulic jump is most frequently encountered features of RVF in open channels as the supercritical flow changes to subcritical flow; during this phenomenon air is entrained because of the breaking of number of wavelets on the surface and get released in the form of air bubbles. Compared to prismatic, non-prismatic channels with appurtenances not only modify the hydraulic jump characteristics but also affect significantly the formation of symmetric flows downstream of the channel. Moreover, non-prismatic channels with baffle blocks & sill arrangements are useful to control the hydraulic jump in stilling basins when there is deficiency of tail water depth and the places where there is design constraints in order to reduce the basin length. It is also useful in the situations where it is impossible to depress the basin floor because of difficulties in excavation; a lateral expansion remains the only option for the required dissipation of energy through formation of hydraulic jump. For safe and economical design of stilling basin in the downstream of dams the characteristics of hydraulic jumps, such as length, toe position and symmetry should be predicted as accurately as possible.
7204 RUR
Agricultural Impacts on Soil Hydraulic Properties hydraulic knockout tool hydraulic hole macking tool hydraulic punch tool syk 15 with the die range from 63mm to 114mm
Agricultural operations affect the soil’s capability for water infiltration and storage. In this doctoral thesis, agricultural impacts in terms of soil compaction and different tillage techniques on the soil hydraulic properties and the water-conducting pores were analyzed. In the first part, infiltration measurements in differently compacted subsoil treatments of an arable field in Lincoln/New Zealand were used to characterize the effects on the soil’s porosity and its associated water-conducting properties. In the second part, the impact of different tillage techniques – conventional (CT), reduced (RT), and no-tillage (NT) – on the hydraulic properties of an arable field in Raasdorf/Austria and its temporal dynamics were captured by repeated measurements. In the third part, data from the tillage study was used to parameterize a soil water simulation with constant and time-variable hydraulic parameters. The results of this thesis give evidence that soil hydraulic properties are strongly altered by soil compaction and different tillage operations. The thesis also shows the importance of temporal variations of soil hydraulic properties and its incorporation in hydrological models.
5481 RUR