GEOL 102 Lecture Notes - Lecture 14: Hydraulic Head, Hydraulic Conductivity, Elevator Pitch
8 Mar 2018
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- memo due 3/7, elevator pitch due 3/14. Moves from high to low elevation-- discharges in different surface water bodies. Darcy"s law to find flow rate= hydraulic conductivity (velocity) x hydraulic gradient (slope/area) (ease with which a fluid can move through x slope of the water table) Cone of depression, depletion, land subsidence (collapse), reverse flow directions (quality contamination), saltwater intrusion. Surface water is unprotected/contaminated move to using groundwater (improved source) Because of how groundwater moves, filters as it moves through pores. Microbial pathogens can die or stick to soil particles, limiting their movement (filtered water-- safer) Chemicals can react, degrade (more safe versions), and stick to soil particles. Ground/well water is a primary source of drinking water. Groundwater contamination is frequent: sources of contamination: Arsenic in well water, derived from aquifer sediments. We apply a lot of waste to the ground: gas stations, dry cleaners, chemicals migrate down. Chemicals and pathogens applied to or stored in the ground.
