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Abstract

Guarapiranga reservoir is one of most important raw water reservoir for the city of São Paulo locate in an area of high population density in SE Brazil. It is responsible for 20% of potable distribution water. During the last decades the reservoir is experiencing a growing eutrophication process due to untreated sewage discharge. Preliminaries Ground Penetrating Radar (GPR) investigations were carried out in area of Guarapiranga reservoir by determine water depth and perform sub-bottom sediment profiling. Accurate periodic information on the elevations the top of sediment and top of original reservoir bottom is important to calculate the volume of sediment to be removed and to establish the reference elevations for the proposed dredging activities. The measurements are non-intrusive and non-destructive, and were conducted along survey lines. Compared with other geophysical methods, GPR profiles have a very high resolution. The selection of the optimum radar frequency is essential to obtain a good resolution and sufficient depth penetration. The obtained results are very interesting.

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/content/papers/10.3997/2214-4609-pdb.160.SBGF135
2005-09-11
2024-03-29
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.160.SBGF135
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