Chapter 3 Multiple choice questions

.
Figure ch03q01.jpg
The saturated hydraulic conductivity K can be determined by placing a soil core sample in a permeameter (see the above figure).
A = surface area of the soil core sample (m2) Δh = h1 - h2 (m)
L = length of the soil core sample (m)
Q = discharge (volume flux) of water (m3 day-1)
All variables have positive values.
Which one of the following alternatives is correct?

.
Figure ch03q02.jpg
The volume flux Q' in m2 day-1 =

. Groundwater is pumped from a confined aquifer. The aquifer's intergranular pressure

. K = saturated hydraulic conductivity
D = saturated depth of an aquifer
S = storage coefficient
The transmissivity of a homogeneous, confined aquifer equals

. Which of the following set of equations hold for vertical steady groundwater flow through two horizontal sediment layers (q = vertical volume flux density; d = depth or thickness of a layer; K = saturated hydraulic conductivity; 1 = layer 1; 2 = layer 2)?

. In a polder the hydraulic head is measured both above and below a semi-permeable layer. The hydraulic head below the semi-permeable layer is one metre higher than the hydraulic head above the semi-permeable layer. The semi-permeable layer has a hydraulic resistance of 2000 days. The upward seepage into the polder in mm day-1 equals

. Figure ch03q07.jpg
The substitute hydraulic conductivity K in m day-1 =

. Remark 1: There are no confined aquifers in The Netherlands.
Remark 2: There are no local groundwater flow systems in The Netherlands.

. A flat soil at field capacity receives 5 cm of rain, which causes the water table to rise 20 cm; water loss by evaporation is negligible. The storage coefficient equals

.
Figure ch03q10.jpg
The volume flux Q' (m2 day-1) of groundwater in this flow net (top view) with equipotentials h and streamlines S for an element with width W and length L equals

Back to top