Modeling of solid sediment transport in mountain rivers

Abstract

In Algeria, the problems of erosion and sediment transport are critical, since they have the most dramatic consequences of the degradation of agricultural soils on the one hand and the siltation of the dam on the other .The sediment transport in the Algerian basins is very important especially during the periods of floods, It is in this sense that this study, which consists of estimating the sediment transport in suspension and determining the models of relation linking the liquid discharge and the sediment discharge in order to estimate the solid transport in the absence of suspended sediments concentration data at the Sidi Akkacha station at the outlet of the basin of Oued Allala which is subject to a high water erosion, it degrades from one year to the other under the effect of this phenomenon especially during the floods which drain high amounts of fine particles exceeding in general, the concentration of 150 g/l, the results obtained from the application of the models are very encouraging since the correlation between liquid and solid discharge exceeds 80 %.

Innovative technologies and equipment from “Amazone” company for fertilizer application

“…Although developed and serially produced for the agroindustrial complex of Russia, special equipment and equipment for it for the introduction of liquid fertilizers ensures the effective use of liquid fertilizers according to various technologies, taking into account the biological characteristics of agricultural cultivation, the type of fertilizers, advanced methods of application both superficially and locally-subsoil. [15][16][17][18] In this connection, systematizing the machines and equipment for the introduction of liquid fertilizers, the following technologies can be distinguished ( Fig. 4): Iwith sprayers with multi-jet nozzles: 1onto the soil surface; 2onto the plant from plants and on the soil surface; IIwith sprayers with extension hoses to the soil surface; IIIwith sprayers with extension hoses to the soil surface and plants; IVwith universal unit FDC (JSC "Eurotechnika") for the working bodies of the cultivator Cenius during the main and pre-sowing soil cultivation; Vwith universal unit FDC when sowing grain crops under the anchor openers of the Primera DMC seeder and chisel openers of the Condor seeder, as well as when sowing row crops under the disc coulters of the precision seeder -EDX (all machines are produced in Russia -Samara, JSC "Eurotechnika").…”

Analysis of Impact of Urbanization Development on the Deterioration of Ecological State of Rivers

“…1) elimination of the consequences of degradation of rivers and reservoirs -their siltation or erosion; 2) reduction of the flow load by sediments; 3) prevention of secondary siltation of riverbeds, reducing the intensity of siltation of ponds and reservoirs; 4) formation of stable regimes (stabilization of the riverbed process) for economic use. These tasks are solved by reclamation measures "Regulation of the alluvial regime" and "Regulation of morphometric parameters" [23].…”