Geol 1040 1st Edition Lecture 36Outline of Last Lecture X. Porositya. Definitionb. High Porosityc. Low porosity XI. Permeabilitya. Definitionb. High permeabilityc. Low permeabilityOutline of Current Lecture XII. Ground water flowa. Where and howb. Controllers of GW flowc. MovementCurrent LectureXII. Ground water flowa. Where and howi. Downhill because of gravityii. Can create a ground water map with elevation and terrain lines to show water tableThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.iii. Steeper gradient, higher rate of flow b. Controllers of GW flowi. Rate controlled by permeability of sediments of rockc. Movementi. Hydraulic head1. The vertical difference between the recharge and discharge point2. Hydraulic gradienta. The water table slopeb. Calculating hydraulic gradienti. Hy. G = (h1 –h2)/dii. Factors influencing the storage and movement1. Aquitard: An impermeable layer that hinders or prevents water movement a. Clay/shale2. Aquifer: permeable rock layer or sediment that transmits ground water freelya. Sand and gravel iii. Confined: separated water flowiv. Unconfined: free moving water
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