GEO 330 Lecture 8: Geo 330-Water as a Resource
Document Summary
Water as a resource: hydrography, study, mapping and description of freshwater supplies, surface stream flow averages 71 million acre-feet annually from within california b. i. Import 6. 2 million acre feet from oregon (natural) b. v. 4. 8 million acre feet from colorado river (artificial: consumption, california ranks high among states in per capita consumption a. i. No statewide deficit: surface flows provide about 60% of usage, groundwater supplies about 40% of usage, 75% of water falls in northern half of state and 75% of demand is in southern half of the state g. Inter-basin transfer: moving excess water from basins to areas of high demand: supplying water, dry summers encouraged water supply schemes even before large population b. Irrigation practiced by native americans: missions and pueblos constructed canals, gold miners built dams and canal networks, beginning in 1880"s commercial agricultural and industrial technology promoted large-scale developments, role of irrigation a. Irrigated farms either directly or indirectly produce most of state"s farm income.
