RESERVOIR SEDIMENTATION ASSESSMENT GUIDELINE - Aneel

Reservoir Sedimentation Assessment GuidelineDescarga sólida total media mensal = Total monthly average sediment discharge7.5.3 Data regionalizationIf there are data for at least two gaging stations along the stream, average valuesfor each gaging station shall be computed, a line concerning the drainage area is drawnand the runoff value is obtained by using the gaging station drainage area (see Figure7.13 of the example for São Francisco River and Rio das Velhas, according to Carvalho,1994).Figure 7.13 –São Francisco Basin – Sediments yield lines (Carvalho, 1994)Produção de sedimento = sediment yieldÁrea = areaThe regionalization for data concerning the same basin may also be performedthrough the analysis of local features in relation to the basin features (see Figure 7.14where the sediment discharge value in UHE Mascarenhas, at the Rio Doce wassearched). The regionalization of sedimentometric data is tricky, and must be carefullyperformed; therefore, it is not recommended.Scientific works like global curves shall not be used for studies, rather, they areused just for curiosity purposes.ANEEL – Brazilian Electricity Regulatory Agency / SIH – Hydrologic Studies and Information Department37