Continually improving management by learning from the outcomes of operational programs designed to experimentally compare selected policies or practices, by evaluating alternative hypotheses about the system being managed.
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    AM Cycle 1:
Baseline gravel rehabilitation performed 1990-1998 by EBMUD.
 
       
  AM Cycle 2:
1999 & 2000 sites used “complex structure” design approach. 1999 site design compared against 4 alternatives using physical habitat and sediment erosion criteria implemented in a 2D model.
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Conclusions
1. An off-the-shelf 2D modeling package can effectively compare alternative scenarios and distinguish design features that enhance physical habitat from those that are counterproductive.

2. Ad hoc gravel replenishment yields highly patchy habitat conditions that are less gravel-efficient and more likely to erode than alternatives designed with the aid of the 2D model
 
       
  AM Cycle 3:
2001 site designed using an interdisciplinary rehabilitation design framework drawing from geomorphology, aquatic biology, civil engineering, and physics.
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  AM Cycle 4:
2002 site designed with improved SHIRA framework.
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  AM Cycle 5:
2003-2004 site designed with up-to-date SHIRA framework.
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