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Geometric Drawing Model of Shape of Water Sections for the Investigation of Solid Flow Transport in the Basin of Mono River in Republic of Benin

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Open Journal of Modern Hydrology 2022年第3期12卷 95-108页

作者： François de Paule Codo lauris senou Apollinaire Tchikpoto Department of Water and Sanitation Engineering National Water Institute (INE) University of Abomey-Calavi Republic of Benin Laboratory for Water and Environmental Sciences and Technics National Water Institute (INE) University of Abomey-Calavi Republic of Benin

The hydrologic and hydraulic changings on the behavior of Mono river are the result of the stress involved by human activities, on one hand and the construction of the dam of Nangbéto and the exploitation of sand in downstream of the dam by the population, between Athiémé and Agbanankin on other hand. That effect had also affected the shape of the sections of the river in the context of climate variability. It shows consequently that area is also a trapping area of sediments eroded in downstream of the dam and is responsible for the trapping of sediments in the river. The slope and the flow rate are the main factors of the real capacity of transport of a watercourse. They also determine the transport of solid flows from upstream to downstream. This drawing model established by taking into account the bathymetry of a transversal section of the Mono river at Athiémé, is the first step of a global investigation of the solid flow transport in the basin of Mono river and the boundary condition for the characterization of its hydro-sedimentary dynamics study. It aims to take into account sections and the used technique which consist to measure on one located section as the representative section of the river at Athiémé, by moving the boat used for bathymetry.

关键词： Mono River Bathymetry Geometric Drawing Modelling Hydro-Sedimentary Dynamics Trapping

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Quantification of Carried Sediment Charges through the Outflow in the Basin of Mono River in Benin

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Open Journal of Modern Hydrology 2023年第4期13卷 276-291页

作者： lauris senou Raudace Nakou Brice Gbaguidi François de Paule Codo Apollinaire Tchikpoto Laboratory of Sciences and Technology for Water and Environment (LSTEE) Water National Institute (INE) University of Abomey-Calavi (UAC) Cotonou Bénin

The filling of rivers generated by carried solid deposit is a factor for the raising of height of rivers and thus activates the floods and inundations. The quantification of carried solid flow charges through their characterization and the analysis of hydrosedimentary dynamics is the second step of the investigation of the solid flow transport in the Mono river. This study aims to quantify the volume of trapped sediments in function of the variation of the geometry of the shape of sections of the river depending of the slope and the flow rate therefore to evaluate the capacity of transport of eroded solid flows of a watercourse from upstream to downstream. Consequently, the decreasing percentage of deposited alluvium from upstream to downstream is calculated along Mono river. Thus the drawn granulometric curve of sediments and the determinate granulometric characteristics of sediments permit to quantify the carried sediment charges at each chosen section with Engelund-Hansen model in Mono river.

关键词： Basin of Mono River Hydro-Sedimentary Dynamics Solid Flow Transport Engelund-Hansen Model

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