Title : Silting process in dam reservoirs. Case study: Lake on the piumhi river in minas gerais - Brazil
Abstract:
Silting in bodies of water is a worldwide problem and, in reservoirs, it results in the reduction of their partial or total capacity. It is a natural process, but it has been intensified by the action of man through deforestation, land movements, inadequate agricultural techniques and the discharge of effluents. This work evaluates the silting process of the Furnas dam reservoir near the urban area of Capitólio in Minas Gerais, Brazil, using automated single-beam bathymetry techniques. An analysis of the charts showing the Digital Elevation Models and Elevation x Surface Area X Accumulated Volume for the surveys conducted in 2013 and 2019, in addition to physical analyzes of deposited sediments, physical-chemical analyses of water, analyzes of changes in use and occupation of the region of the contribution of the reservoir and the precipitation in the region, the author tried to find a correlation of these factors with the silting in the place. An analysis of silting in the reservoir was also carried out using the HEC-RAS software in the period between the surveys and later a future projection of this process was carried out. Areas to be dredging and preventive measures were suggested so that dredging works do not have to be carried out frequently.
