AGRON 160 Lecture 3: Water Lecture 3
13 Feb 2017
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Document Summary
Precipitation: movement of water from atmosphere to earth as rain or snow. Evaporation: vaporization of water from lakes, rivers, land, and oceans transferred back to the atmosphere transpiration: occurs through plants which take up infiltrated water (and/or groundwater) and return a portion of this to the atmosphere through leaf stomata. Runoff: water that runs over land during and after a storm. Infiltration: pre(cid:272)ipitated (cid:449)ater e(cid:374)teri(cid:374)g the soil zo(cid:374)e water (cid:373)a(cid:455) (cid:271)e stored or per(cid:272)olate to groundwater percolation: Groundwater flow: (cid:449)ater i(cid:374) the saturated zo(cid:374)e (cid:449)ater dis(cid:272)harges i(cid:374)to ri(cid:448)ers (cid:894)a. k. a. (cid:271)aseflo(cid:449)(cid:895), o(cid:272)ea(cid:374)s, springs. Dams and distribution systems: scientific understanding (genesis of runoff; water cycle) First concepts of the hydrologic cycle date back to 1000bc from hindu scripture. The reason water flowed from the mountain is that cold air converted air into water: aristotle. Water was held in great underground sea and flowed against gravity into the mountains, then back to the oceans: marcus vitruvis.
