The initial piezometric head in a confined aquifer, which has a thickness of 11.6 m, is 85.7 m above sea level. A well with a radius of 0.5 m pumps at a constant rater 3 of 1,240 m3 /day. After the cone of depression has achieved equilibrium (i.e., steady state), the piezometric heads at two observation wells 40 m (well 2) and 95 m (well 1) from the pumping well are measured as 78.9 m and 83.4 m above sea level, respectively. - determine the total well losses in and around the pumping well if the observed head in the pumping well during equilibrium is 46.6 m. - A tracer was injected into well 1. We find it takes 50 days for the injected dye to travel to the well 2. Estimate the aquifer porosity (n).

The initial piezometric head in a confined aquifer, which has a thickness of 11.6 m, is 85.7 m above sea level. A well with a radius of 0.5 m pumps at a constant rater 3 of 1,240 m3 /day. After the cone of depression has achieved equilibrium (i.e., steady state), the piezometric heads at two observation wells 40 m (well 2) and 95 m (well 1) from the pumping well are measured as 78.9 m and 83.4 m above sea level, respectively. - determine the total well losses in and around the pumping well if the observed head in the pumping well during equilibrium is 46.6 m. - A tracer was injected into well 1. We find it takes 50 days for the injected dye to travel to the well 2. Estimate the aquifer porosity (n).

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.22P: Refer to Figure 7.24. The following data were collected during the field permeability measurement of...

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