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GROUNDWATER HYDROLOGY AND CONTAMINANT TRANSPORT CEVE 518 P.C. de Blanc C.J. Newell

GROUNDWATER HYDROLOGY AND CONTAMINANT TRANSPORT CEVE 518 P.C. de Blanc C.J. Newell. Test 1 Review. Administrative. Test 1 Next lecture (Thursday, October 6). Covers material through steady-state flow (Theim equation).

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GROUNDWATER HYDROLOGY AND CONTAMINANT TRANSPORT CEVE 518 P.C. de Blanc C.J. Newell

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  1. GROUNDWATER HYDROLOGY AND CONTAMINANT TRANSPORTCEVE 518P.C. de BlancC.J. Newell Test 1 Review

  2. Administrative • Test 1 • Next lecture (Thursday, October 6). • Covers material through steady-state flow (Theim equation). • Can bring in one 8.5 x 11 sheet of notes and page issued by instructor at exam. • Review lecture hand-out will be made available for cutting/pasting. • Homework No. 4 • Will be issued Thursday, October 6. • Well be due Tuesday, October 18. • Transient flow problems, pump test analysis. • Papers for critical review available Thursday, October 13. • Reviews due last day of class. • Guidance on reviews will be issued next week. • Field Exercise and Project No. 1 • Thursday, October 13.

  3. Basin Hydrologic Cycle Charbeneau, 2000.

  4. Basin Hydrologic Cycle – Quantitative Representation Basin I Surface/ Soil Aquifer Domenico and Schwartz, 1990.

  5. Charbeneau, 2000.

  6. Example Layered Aquifer System Bedient et al., 1999.

  7. Bedient et al., 1999.

  8. REV – Scale Effect Freeze and Cherry, 1979.

  9. Moisture Content in Capillary Zone Charbeneau, 2000.

  10. Pressure and Elevation Heads - Laboratory  = pressure head z = elevation head h = total head Freeze and Cherry, 1979.

  11. Pressure and Elevation Heads - Field  = pressure head z = elevation head h = total head Freeze and Cherry, 1979.

  12. Capillary Rise in a Tube Domenico and Schwartz, 1992.

  13. Soil Water Characteristic Curve is a Function of pore size Capillary forces hold water tightly in small clay pores. Larger sand pores produce lower capillary pressures. r,and r,lay 0 nsand nclay Charbeneau, 2000.

  14. Soil Water Characteristic Curve is a Function of Sorting (Pore Size Distribution) Relatively wide range of pore sizes from small to large results in widely varying capillary pressures. Narrow range of particle sizes results in relatively small range of capillary pressures. Fetter, 1999.

  15. Who Was Darcy? • Henry Philibert Gaspard Darcy was born June 10, 1803 in Dijon, France. • Admitted to the French School of Bridges and Roads in Paris, part of the Corps of Bridges and Roads. After graduation, he was eventually assigned by the Corps to a position in Dijon. • In 1828, Darcy designed a 12.7 km system of aqueducts to supply the city of Dijon with surface water. The system included 28,000 m of pressurized surface lines and required no pumps or filters. • Made important contributions to flow and friction loss in pipes, created an improved pitot tube design, and was the first to postulate the existance of a boundary layer in fluid flow. • In 1856, carried out experiments while researching sand filters that lead to Darcy’s Law. • Died unexpectedly January 3, 1858 from pneumonia during a trip to Paris.

  16. Dupuit Flow in Unconfined Aquifers Ux

  17. Unconfined Aquifer with Recharge xdivide

  18. Radial Flow to a Well

  19. Radial Flow to a Well s sw (“cone of depression”) S = Drawdown Ur = Radial flow per unit width Todd, 1980.

  20. Principle of Superposition – Multiple Wells

  21. Example – Use of Theim Equation to Calculate T P1 P2 Todd, 1980.

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