Environmental Science 1021F/G Lecture Notes - Lecture 15: Surface Runoff, Aeration, Evapotranspiration
24 Mar 2016
School
Department
Professor
Document Summary
In ltration ---> movement of water from top of soil, into the soil. Movement through soil, pools in open body of water. Evaporates and returns to atmosphere as water vapour. Water may not in ltrate, could just run off. End up again in open bodies of water. 71% of the entire planet is ocean about 2. 5% is fresh water-->hard to approximate. Very little of this is accessible, most as ice and glaciers. We can use ground water and surface water. Water is renewable, only if used below its sustainable yield. Will focus on surface water and ground water b/c its readily accessible. Surface runoff water that does not in ltrate into soil or taken up by plants. Simply runs off, drains into a watershed or drainage basin. Not all is reliable runoff, we consider it reliable if it falls within climate averages. Climatically normal, we depend on it for resource.
