quiz 6 Flashcards
What is a hydrograph of a stream?
A time record of the discharge of the stream
Define runoff coefficient.
Rate of water that runs off a surface divided by the rate of precipitation
What is a hydraulic gradient of an unconfined aquifer?
slope of the water table
What is NOT true for an artesian well?
Water is at atmospheric pressure.
What is the definition of porosity of a soil material?
The ratio of the volume of voids to the total volume of material
Which material has the highest hydraulic conductivity?
fractured rock
What is diffusion in terms of contaminant transport
movement of contaminant from regions of high concentration to regions of low concentration
How is “retardation factor” defined in the context of contaminant movement in groundwater?
velocity of water divided by velocity of contaminant
What does NAPLs stand for?
Non-aqueous phase liquids
What are LNAPLSs
NAPLs that are ligther than water
Which technology is NOT used for aquifer/soil remediation
distillation
Soil-vapor extraction technology is used for remediation of what?
unsaturated zone
What is involved in the pump-and-treat technology for ground water remediation
Groundwater is extracted and treated above ground
List three in-situ bio-remediation strategies.
natural attenuation, bio-stimulation, cometabolism
What is involved in bio-stimulation technologies
addition of nutrients, oxygen, methane, or microorganisms
