Streaming Potentials Associated with Well-Pumping – Analogical and in Situ Results

B002 STREAMING POTENTIALS ASSOCIATED WITH WELL-PUMPING – ANALOGICAL AND IN SITU RESULTS Summary 1 Water flowing in a porous media causes natural electrical currents called streaming potentials. Thus during pumping the inflow of water to the well causes a positive potential anomaly above the well. Analogical experiments in a tank during well-pumping show that the piezometric surface acts as a dipolar electrical source. Furthermore measurements of the streaming potentials before during and after pumping show that they are linearly dependent of the variation of the water level thus allowing calculation of the coupling coefficient around the well. This opens some