EARTHSC 2GG3 Chapter Notes - Chapter 2: Rat Flea, Aquifer
15 Apr 2018
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Of all hazards, large scale diseases affect human populations most directly. These hazards are different than others studied since they only impact people rather than property. Communicable diseases are the leading cause of mortality in less developed countries. Water generally can be pumped from a well faster than the aquifer can recharge. Before pumping the table is reasonably flat, but as pumping proceeds the water table is reasonably flat but as pumping proceeds, the water table drops. A cone of depression forms at each well. Very fine sediments like clay, typically have low permeability. Very coarse sediments typically have excellent permeability. Aquifer body of sediment that is both porous and permeable, can also be in fractured rocks if the fractures are well-connected. This event began in hong kong in 1894 and rapidly spread around the world. Within 10 years, it entered 77 ports on 5 continents and caused over 13 million deaths.
