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Scenarios for design floods computing in Miletin River Basin equipped with hydrotechnical facilities

The paper presents few scenarios for determining the design floods in Miletin River Basin equipped with hydraulic structures, using the mathematical model RAZVAN. This model allows automatic tracing the shape of design floods produced on tributaries (components), their composition and routing on different river reaches (branched hydrological network), resulting in the analysed section of the river basin the design flood with maximum discharge having a given probability of exceeding. Also, the model allows determining the flood waves changed due to the influence of the hydro-technical facilities from the analysed river basin. Determination of the components is made by the following composing scenarios: depth of runoff evenly distributed on the basin, depth of runoff unevenly distributed on the basin, concentrated depth of runoff upstream and downstream of the reservoir. The model was applied in the confluence section of the river Miletin with the river Jijia, considering reservoirs Câmpeni and Hălceni, both situated on the river Miletin. The results concerning the composition, routing and attenuation by reservoirs of the components corresponding to design floods having 1% probability of exceeding, in the four composing scenarios considered, are presented both numerically and graphically.