Boundary Conditions Exercise Key

In some cases, more than one response is correct and the assumptions made about information that is not given in the description will influence the nature of the conceptual model. If your answers differ from mine, please include this in an email message to me.

1a. Theis non-equilibrium formula, cross-sectional (xsec) view:



1b. Dupuit formula for radial flow under water-table conditions:



1c. Thiem equation for flow to a well in a confined aquifer written in terms of head (h):



2a. An oceanic island in a humid climate; permeable materials are underlain by relatively
impermeable bedrock;



2b. An alluvial aquifer associated with a medium-sized river in a humid climate; the aquifer
is underlain and bounded laterally by bedrock of low hydraulic conductivity;



and in plan view:



2c. An alluvial aquifer associated with an intermittent stream in an arid climate; the aquifer
is underlain and bounded laterally by bedrock of low to intermediate hydraulic
conductivity;



the plan view is similar to that of 2b



2d. A western valley with internal drainage in an arid region; intermittent streams flow from
surrounding mountains towards a valley floor; a part of valley floor is playa;



and in plan view:



2e. A confined aquifer bounded above and below by leaky confining beds.



Include your questions and comments in an email to me on this topic.