Submitted to: NRCS Design Guide
Publication Type: Government Publication
Publication Acceptance Date: December 1, 1996
Publication Date: N/A
Interpretive Summary: Material included in this appendix to NRCS design guide has previously been published in scientific media; no new research information is reported; no interpretive summary is required.
Technical Abstract: The earth spillway erosion model incorporated into the NRCS Water Resource Site Analysis software combines basic physical principles with data gathered from field spillways to predict the extent of erosion expected from a given hydrograph through the spillway. The intended use of the model is to evaluate the potential for a given flow to breach the spillway and release stored water. The model utilizes a three-phase iterative approach to spillway erosion computations. Different relations are required to describe each of these phases. The relations for each phase are summarized and the implication of their application in the model are briefly discussed.