On Mon, Jul 31, 2023 at 11:42 PM bonushenricus <bonushenricu...@gmail.com> wrote:
> Hi Anna > I too immediately thought it was enough to compute it for the final step > of the simulation, > but I noticed that the same slope, same ditches, same rainfall, for two > reservoirs at the same location, same length along a contour, but different > width and depth, at the final step of the simulation the water depth was > always 30 cm, I went to read the article > Mitasova, Helena, Chris Thaxton, Jaroslav Hofierka, Richard McLaughlin, > Amber Moore, e Lubos Mitas. «Path Sampling Method for Modeling Overland > Water Flow, Sediment Transport, and Short Term Terrain Evolution in Open > Source GIS». In *Developments in Water Science*, 55:1479–90. Elsevier, > 2004. https://doi.org/10.1016/S0167-5648(04)80159-X > where I read the Saint-Venant equation. I am an agricultural technician > and geographer unfortunately ignorant of hydrological calculations and > serious mathematics, and I understood, looking at the equation, that the > water depth is the depth of overland flow = rainfall exces - water flow. > So the final 30 cm should not be understood as accumulated water, but as > the blade of water that was added at that precise moment. > Isn't my interpretation right? > No, it should be actual water depth. I didn't understand the discrepancy you are describing? > -- > > -- > Perito agrario Enrico Gabrielli > progetto F.A.R.M. www.farm-agroecologia.it > Tessera n. 633 Collegio Periti agrari prov. Di Modena > Biblioteca agricoltura: > https://www.zotero.org/groups/aplomb/https://www.inaturalist.org/observations/bonushenricus > > > > Il giorno lun, 31/07/2023 alle 14.34 -0400, Anna Petrášová ha scritto: > > > > On Sun, Jul 30, 2023 at 6:01 AM bonushenricus <bonushenricu...@gmail.com> > wrote: > > Hi > From r.sim.water, how can I calculate the volume of water stored in > small water storages placed along a relief and connected to ditches? > In this article https://doi.org/10.1016/j.agwat.2023.108398 these > Italian researchers with r.sim.water manage did this calculation, but I > do not understand how. With a calculation at different times on > discharge at the entrance to the water storage? > I tried to contact them, but they did not reply. > Thanks! > > > Hi, > > volume would be simple depth times cell size squared for a certain > selected area. I would compute it for the final step of the simulation, I > am not sure what is the purpose of summing it for different time steps. > Perhaps you could clarify a little bit? > > Anna > > > -- > >
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