Re: Channels and Routing
Posted: Mon Mar 25, 2019 6:32 pm
I have a large basin to model that I have partitioned into ten sub-basins. To reduce computational time, I would like to simulate each sub-basin separately and in parallel. In accordance with the suggestions regarding BrianHydro’s issue, I then intend to run a final simulation where the sub-basin to sub-basin connectivity is described and each sub-basin’s “rainfall” is based on its previous simulation’s hydrograph.
As a toy case, I tried to drive a single sub-basin comprised of one hru with precipitation equal to its observed hydrograph (converted into mm/day). Using ROUTE_DUMP as the catchment routing method, I expected the simulated hydrograph to exactly match observations. However, I have slightly mismatched hydrographs. It appears at each time step, half of the precipitation arrives at the outlet while the other half goes to rivulet storage and arrives at the outlet in the next time step.
Is there a way for me to fix this without pre-processing the “rainfall” hydrograph to account for rivulet storage? Is there a better way to simulate sub-basins in parallel?
Many Thanks,
Kai
As a toy case, I tried to drive a single sub-basin comprised of one hru with precipitation equal to its observed hydrograph (converted into mm/day). Using ROUTE_DUMP as the catchment routing method, I expected the simulated hydrograph to exactly match observations. However, I have slightly mismatched hydrographs. It appears at each time step, half of the precipitation arrives at the outlet while the other half goes to rivulet storage and arrives at the outlet in the next time step.
Is there a way for me to fix this without pre-processing the “rainfall” hydrograph to account for rivulet storage? Is there a better way to simulate sub-basins in parallel?
Many Thanks,
Kai