conversion mass capacity to volume capacity

[CIH]

Hello,
I use Hec-Ras 4.1.0 for a project about sediment. I work with SI units. I get results for sediment. It is possible to choose mass or volume in Options (sediment output options) of the sediment Transport analysis.
Nevertheless, I don’t understand how Hec-Ras converts volume capacity (I have 1.607093.10^(-3) m^3/day) into mass capacity (I have a mass capacity of 0.2056153 tons/day).
Could someone explain that to me? Which calculation does Hec-Ras compute to convert mass capacity into volume capacity?

[cameron]

It is based on the sediment properties you specify in the Sediment properties window under “Options”.

[CIH]

Thank you for your answer.
Nevertheless, I am still unable to do the conversion between volume and mass. For exemple I have a cumulated mass of 0.4463321 tons and a corresponding cumulted volume of 2.16.10^(-3) m^3. I have chosen a specific gravity of 2.65 and a shape factor of 0.6. The density of sand is 1489kg/m^3. (I only used sand in the simulation). But if I multiply the cumulated volume by a density, I don’t have the cumulated mass I would like to obtain.

[CIH]

I tested the 5.0 version. I didn’t have a problem. It is only with the 4.1.0 version with the SI units that the conversion is stange.

[Anonymous]

Hi, guys!

I can’t find a way to plot mass capacity in my sediment simulation. Where can I find this option?

Thanks

[cameron]

Did you check under View| Sediment Output? You may need to adjust the output level in the Sediment Output Options Window to level 6. page 17-73 of user manual.

[Author]

Posts