EARTHSC 2WW3 Final: 2ww3 exam review every lecture
21 Jan 2014
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Document Summary
80% in bangladesh have high amounts of arsenic in their water source region drainage divide tributaries mouth. Arch dams: displace the load of water onto the rock walls that it is built into, holds more water whilst using less concrete, can only be built where the walls of the canyon are unquestionably stable, must be impervious to seepage as this could be a source of dam failure in the future, can only be built in very limited locations, but use less materials than gravity dams, but more expensive to construct. Began a long term clean up in 2001: 2001, 2002, 2003, 2004, 2005, 2006. Environmental affects: leachate, eutrophication, soil nutrient imbalance, methane release, n&p are major concerns to water, kangaroos don"t release methane. Surface flow: sheet flow = little to no clogging, less operational demand, simpler construction, limited management, greater capacity for p retention, more biologically diverse.
