Regionalization with hydraulic geometry and fractal: case study with geomorphologic instantaneous unit hydrograph

ABSTRACT

The Geomorphological Instantaneous Unit Hydrograph (GIUH) is generated from two components, one in relation to the geomorphology of the watershed and the other in to relation the hydraulic conditions of drop water moment along the channel. From this observation, the objective of the present study is to determine relationship between water flow velocity and length of channels for each basin, using velocity values measured in the field, and effective rainfall of seven distinct events, it was generated calibrated GIUH. With the v values for each basin were related linearly and potential, multivariate regression, the annual rainfall (Pma) parameters, Hydraulic Geometry (HG) and Fractal Geometry (FG) determining a regionalized equation v. The GIUHs determined from Pma, GH and GF performed well when compared to the observed hydrograph, which proves that this methodology is suitable to represent and estimate flows.

Keywords:
GIUH; Average Annual Rainfall; Hydraulic Geometry; Fractal Geometry