O. Closure of Sediment Budgets

Synopsis of Topic

A morphological sediment budget is a statement of the conservation of mass - a fancy way of saying that the change in storage (i.e. the stuff from our DoD change detection) is equal to what came in to our area of interest minus what left our area of interest. In this lecture, Dr. Erwin will talk to us about the challenges in closing sediment budgets  (i.e. quantifying all three terms and seeing if they add up correctly), and share with us her doctoral research on this topic.

Why we're Covering it

One of the most common applications of geomorphic change detection is quantifying a morphological sediment budget. This is an excellent precursor to interpreting your change detection results.

Learning Outcomes Supported

This topic will help fulfill the following primary learning outcome(s) for the workshop:
  • Methods for interpreting and segregating morphological sediment budgets quantitatively in terms of both geomorphic processes and changes in physical habitat


Slides and/or Handouts

Relevant or Cited Literature

  • In Review. Erwin SO, Wheaton JM and Schmidt JC. Closure of sediment budgets: tractable task or elusive goal?  Water Resources Research. 
  • 2002. Lindsay JB and Ashmore PE. The effects of survey frequency on estimates of scour and fill in a braided river model. Earth Surface Processes and Landforms. 27(1): 27-43. DOI: 10.1002/esp.282.

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