Multiple Choice (15 pts) The \"n-value\" reported in a drilling record is most l
ID: 290978 • Letter: M
Question
Multiple Choice (15 pts) The "n-value" reported in a drilling record is most likely related to: a. 1. aquifer porosity b. standard penetration resistance exponent of hydraulic conductivity c. d. number of auger flights used when drilling hole 2. Which of the following boundary conditions is appropriate to account for recharge coming off of a mountain front? a. No-flow b. Constant head c. Specified flux d. (b) or (c). The Cooper-Jacob approximation is generally valid for: a. early time b. late time 3. c. observations close to pumping wll d. observations far from pumping well e. partially penetrating wells f. (a) and (d) . (b) and (c) When the total inflow equals the total outflow in a hydrologic system, the system is considered to be: a. homogeneous b. isotropic c. transient d. steady state 4. Flow nets are NOT an appropriate solution method for which of the following conditions (circle all that apply). a. Steady state b. Transient c. Homogeneous d. Isotropic 5.Explanation / Answer
1. b) Standard penetration resistance.
The 'n-value' reported in a drilling record is most likely related to standard penetration resistance.
2. d) b or c.
Constant head or specific flux boundary conditions are appropriate to account for recharge coming off of a mountain front.
3. g) b and c.
The Cooper-Jacob approximation is generally valid for late time and for observations close to the pumping well.
4. b) Isotropic
When the total inflow = the total outflow the hydrologic system is known as Isotropic system.
5. b and c
Under conditions of transient or homogeneous flow, flow nets are not an appropriate solution.
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