GGR227H5 Lecture Notes - Lecture 8: Water Cycle, List Of Lakes By Volume, Hydroelectricity
Document Summary
Ggr227 lecture 8 water resources and freshwater. Fixed supply like other elements/material resources. Earth"s approxi(cid:373)ate (cid:449)ater (cid:448)olu(cid:373)e is (cid:1005),3(cid:1012)(cid:1010),(cid:1004)(cid:1004)(cid:1004),(cid:1004)(cid:1004)(cid:1004) km3. Water availability per person will drop by 74% before 2050. Some water is renewable other is not renewable on a time scale useful to humans. Most freshwater accessible to humans is found in lakes, rivers. Humans can only live 5 days without water. 62% of our power is from hydroelectricity. Ca(cid:374)ada is the (cid:449)orld"s se(cid:272)o(cid:374)d highest users of (cid:449)ater: flushing toilets, washing clothes, taking showers, running faucets/pipes, wasted from leaks. Hydrologic cycle is powered by solar energy water exists in all 3 forms in the cycle. Most precipitation that falls on land is from the evaporation from the oceans. Residence time of the hydrologic cycle is proportional to the reservoir. Transpiration process by which moisture is carried through the plant from soils/roots to small pores in the leaves, resulting in the loss of water vapor to the atmosphere.
