AGRON 160 Lecture 2: Water Lecture 2
12 Feb 2017
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Document Summary
Water is central to human civilizations: needed for life, agriculture, and navigation. Early humans lived closed to sources of water: drinking source, wild game congregation. Or migrated from water source to water source: nomadic tribes of eastern africa, seri indians sw usa. Tigris and euphrates river: mesopotamia, urban societies date to 5000 bc. Be(cid:272)ause of hu(cid:373)a(cid:374)"s depe(cid:374)de(cid:374)(cid:272)e o(cid:374) (cid:449)ater: humans are subject to water related catastrophes. Drought, flood: leads to the desire to (cid:862)(cid:272)o(cid:374)trol(cid:863) (cid:449)ater. Historical look at water management: drinking water and municipal supply. Semi-arid: regions that receive low annual rainfall (10-20 inches/year) * sw usa. London: built aqueduct to bring in clean water, still used today, b(cid:455) the e(cid:374)d of the (cid:1005)8(cid:1004)(cid:1004)"s (cid:373)ost to(cid:449)(cid:374)s i(cid:374) gb had (cid:373)u(cid:374)i(cid:272)ipal (cid:449)ater supplies. State of water supply worldwide: ~700 million people in 43 countries suffer from water scarcity. Grow food during dry periods and in dry places.
