CEE 370 Lecture #21 10/28/2019 Print version Updated: 28 October 2019 CEE 370 Environmental Engineering Principles Lecture #21 Water Resources & Hydrology I: Groundwater Reading: Mihelcic & Zimmerman, Chapter 7 David Reckhow CEE 370 L#21 1 http://www.ec.gc.ca/water/images/nature/grdwtr/a5f2e.htm 2 CEE 370 L#23 David Reckhow Lecture #21 Dave Reckhow 1
CEE 370 Lecture #21 10/28/2019 D&M: Fig 6-19 Subsurface Hydrology Aquifers Confined, unconfined, perched, artesian Saturated & unsaturated zone Capillary fringe 3 CEE 370 L#23 David Reckhow 4 CEE 370 L#23 David Reckhow Lecture #21 Dave Reckhow 2
CEE 370 Lecture #21 10/28/2019 Artesian vs unconfined 5 CEE 370 L#23 David Reckhow Example 6 CEE 370 L#23 David Reckhow Lecture #21 Dave Reckhow 3
CEE 370 Lecture #21 10/28/2019 Example A 7 CEE 370 L#23 David Reckhow Hydraulic Gradient Example B 8 CEE 370 L#23 David Reckhow Lecture #21 Dave Reckhow 4
CEE 370 Lecture #21 10/28/2019 9 CEE 370 L#23 David Reckhow More Definitions Aquiclude – impermeable layer Aquitard – less permeable than aquifer Isotropic – aquifer conditions same in all directions Anisotropic – properties differ in different directions Homogeneous – characteristics uniform at different spatial locations Heterogeneous – characteristics non-uniform Springs – areas where water table intersects ground surface 10 CEE 370 L#21 David Reckhow Lecture #21 Dave Reckhow 5
CEE 370 Lecture #21 10/28/2019 Question All else being equal, groundwater flows fastest in an aquifer composed of: A. Sand B. Loam C. Silt D. Clay E. Granite 11 CEE 370 L#21 David Reckhow Hydraulic Conductivity 12 CEE 370 L#23 David Reckhow Lecture #21 Dave Reckhow 6
CEE 370 Lecture #21 10/28/2019 Hydraulic Conductivity 7-25 13 CEE 370 L#23 David Reckhow To next lecture 14 CEE 370 L#21 David Reckhow Lecture #21 Dave Reckhow 7
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