Class Notes (835,674)
Canada (509,326)
Environment (894)
ENV100Y5 (713)
murk (80)
Lecture

env100 note 33.docx

6 Pages
108 Views
Unlock Document

Department
Environment
Course
ENV100Y5
Professor
murk
Semester
Fall

Description
ENV100 Lecture NotesJan 9 2012 FRESHWATER SYSTEMS AND WATER RESOURCES continued READING Chapter 11Groundwater is Earths largest unfrozen freshwater reservoirAquiferunderground reservoirs of rock and sediment that hold groundwater o Water tableupper surface of water in an aquiferGroundwater may stay for thousands of years in an aquifer o In Canada there is much more water underground than on the surface o 26 of Canadas population depends on groundwater 8 million people o 23 are rural usersAquifers are porous and permeable watersaturated rock or sediment unitsAquifers store and transmit water o Porosity pore space o Permeabilityinterconnectedness of poresAerated zonesome air some waterSaturated zonecompletely filled with water otable top of the saturated zone Groundwater moves down from the surface to the saturated zoneGroundwater flow is controlled by gravityWater table mimics topography o Where water table intersects surfacesurface waterRechargewater flows into an aquifer via precipitationinfiltrationDischargewater flows out of an aquifer via percolationstreamsspringsoceanWater use has increased fourfold over the past 40 yearsPer capita access to clean water has declinedWater supply o Waterstressed10002000 m3personday overuse o Waterscarce 1000 m32700 lpersonday unavailability 42 countries waterscarce o 12 billion without access to clean water o 17 billion without access to sanitation o Most are in developing nationsWater is unequally distributedMany areas with high population density are waterpoor and face serious water shortages Water supplies houses agriculture and industry
More Less

Related notes for ENV100Y5

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit