CE En 547 - Final Exam KEY

Fall Semester 2017

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1. (1 pt each) True or False:

a. T F  (concmod) Most aquifer systems are transient by nature.

b. T F  (gw-concepts) Parsimony is defined as always using the most sophisticated and comprehensive model that your time and budget allow.

c. T F  (modflow) A time step in a transient MODFLOW simulation can consist of either one stress period or many stress periods, depending on how much the corresponding model stress varies with time.

d. T F  (bc) A ground water divide is a type of no-flow boundary condition.

e. T F  (goveq) Specific storage is a function of both the soil stiffness and the compressibility of water.

f. T F  (gms) The midpoints of arcs are called nodes and the endpoints are called vertices.

g. T F  (transient) In general, the smaller the cell size, the smaller the time step size in order to achieve sufficient accuracy for a transient simulation.

h. T F  (calibration) In general, the number of parameters should be greater than the number of observations when performing model calibration.

i. T F  (calibration) The Mean Absolute Error is generally smaller than the Mean Error.

j. T F  (head-darcy) Water will always flow from a point of highhigh pressure to a zone of low pressure.