She was heavy on having to deal with sedimentation.. it would have been interesting to hear if she’s using any of Stanford’s sedimentation routines on these projects..
I have definitely run into many environmental restoration/habitat suitability problems where down river losses or gains to groundwater played a significant role in available flows and habitat suitability. Unfortunately, RAS doesn't allow for groundwater loss modeling in this way (it only subtracts groundwater loss from rainfall rather than calculating losses from the river bed to groundwater as flows move downstream). This certainly limits the use of RAS for environmental restoration problems, at least in California.
Thanks for the comment Bathany. There are ways remove volume from a RAS model to account for groundwater losses by using an internal boundary condition with a negative inflow hydrograph. Its not perfect but it works.
She was heavy on having to deal with sedimentation.. it would have been interesting to hear if she’s using any of Stanford’s sedimentation routines on these projects..
Good question- I will try and ask her!
I have definitely run into many environmental restoration/habitat suitability problems where down river losses or gains to groundwater played a significant role in available flows and habitat suitability. Unfortunately, RAS doesn't allow for groundwater loss modeling in this way (it only subtracts groundwater loss from rainfall rather than calculating losses from the river bed to groundwater as flows move downstream). This certainly limits the use of RAS for environmental restoration problems, at least in California.
Thanks for the comment Bathany. There are ways remove volume from a RAS model to account for groundwater losses by using an internal boundary condition with a negative inflow hydrograph. Its not perfect but it works.