GEOG 106 Lecture 11: Human Impact on the Environment - Lect 11
Document Summary
Wetland: bogs: ponds toughly covered with thick mats of vegetation. Lakes and ponds: oligotrophic: low nutrients and high oxygen conditions. It may slowly give way too high-nutrient, low-oxygen conditions of eutrophic ( ) water bodies. Diversions: the routing of the water from its natural channel by means of built structure. It is estimated that dams, canals and diversions affect 60% of the world"s largest 227 rivers. Dams: any obstruction placed in a river or stream to block the flow of water so that water can be stored in a reservoir. Built to prevent floods, provide deinking water, and generate electricity. Water usage: world, canada, 70% agriculture, 20% industrial, 10% domestic, 20% agriculture, 56% industrial, 24% domestic. The gardiner dam largest water holding capacity in can. Largest dam in the world is 3 gorges dam in china. Water pollution categorization: physical (suspended matter and thermal, chemical (toxic chemicals, biological (nutrient pollution and pathogens and waterborne diseases)
