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1.061

Transport Processes in the Environment

3-1-8 units · Undergraduate

Introduction to mass transport in environmental flows, with emphasis on river and lake systems. Covers derivation and solutions to the differential form of mass conservation equations, hydraulic models for environmental systems, residence time distribution, molecular and turbulent diffusion for continuous and point sources, boundary layers, dissolution, bed-water exchange, air-water exchange, and particle transport. Meets with 1.061A first half of term. Students taking graduate version complete additional assignments.

Fall 2008

Topics

  • Introduction to transport, control volumes, and time-scales
  • Flow profiles and turbulence
  • Logarithmic profile
  • Reactor models Residence time distribution
  • Wetland circulation
  • Introduction to diffusion Differential form of transport equation
  • Instantaneous point source
  • Accounting for boundaries; Peclet number
  • Turbulence and diffusion
  • Continuous release 1-D: steady and unsteady
  • Dispersion
  • Dispersion (cont.) Continuous release two and three dimensions
  • Diffusivity in rivers
  • Control volume with reactions; dissolution
  • Constant concentration boundary condition
  • Air-water exchange
  • Air-water exchange (cont.)
  • Air-Water exchange (cont.)
  • Partitioning
  • Retardation factor
  • Retardation factor (cont.)
  • Particle transport
  • Colloidal transport
  • Lake physics

Readings

  • Fischer, Hugo, John List, C. Robert Koh, Jorg Imberger, and Norman Brooks. Mixing in Inland and Coastal Waters . San Diego, CA: Academic Press, 1979. ISBN: 9780122581502.
    Listed reading

Prerequisites & course information

Subject meets with 1.61 Prereq: 1.060 Acad Year 2027-2028: U (Fall) Acad Year 2028-2029: Not offered 3-1-8 units Credit cannot also be received for 1.061A

Sources