Confecção das curvas características hidrodinâmicas para poços de grandes diâmetros ( tipo Amazonas) em três áreas do sertão paraibano.

Abstract

The necessity of this thesis arose because of the fact that Large Diameter Wells - otherwise called Amazons Wells - are becoming more and more popular in all over the semi-arid world. This work was realized using the realistic field data on large diameter and tubular wells, located in the interior of Paraiba State namely at Ibiara, Jerico and Santa Cruz in order to construct "Hydrodynamic Characteristic Curves" that involve: Discharge (Q), Drawdown (S,), Diameter ( ) and Efficiency of Wells (E %) and Filter Factor (ff). With this in view, simulation models were developed and utilized for Large Diameter Wells and Tubular wells, in the calibration and simulation of the data. In the Large Diameter Wells mathematical simulation model is inserted the Concept of Filter Factor(ff) which is a function of the construction material of Amazons Wells, namely bricks and cement mortar. From then onwards, tables were prepared which serve for constructing such curves. Further, the equipotential (curves were plotted with the hydraulic heads obtained at the respective nodes of the simulated network) (PHl(tp)), to serve as na example. Once such characteristic curves were obtained, the interpolation was used to obtain the regression equation for the points in question, in such a form as to result in not only obtaining curves but also in the respective equations that describe these curves to facilitate exploration of Large Diameter Wells in the study areas. This information may be utilized by agronomers or agriculturists of the respective areas of study, to arrive at the the correct diameter to be adopted for the Amazons wells in the given locality, as per the well discharge needed in the given locality, without causing prejudice, neither for the aquifer, nor to the production well, thus restricting the drawdown in the well within the acceptable limits.