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Dear Jirka, I have problem how should i do ? when i want to set slope of tank model(hydraulic gradient). I mean i create tank model (unsaturated-saturated model) for studying movement of heavy metal when it leak from the containment from topsoil to groundwater and i want to set groundwater flow have a slope 0.001. How can i set in this sloope of groundwater flow(hydraulic gradient) in this model? This set up model similar as example 7 in manual but in this example has constant water level but in my set up model i want to change it have slope of groundwater flow (hydraulic gradient) I 'm new users pls. advice me. And I have another 1 question that is Kd is the same value in unsaturated and saturated zone ? I 'm not sure in theory . And any suggestion, you can advice me. Regards, Srilert
In the boundary module you need to specify initial condition (pressure heads) at a slope of 0.001. Then you need to fix the pressure head (constant head boundary condition) at both sides. Kd should be the same in the unsaturated and saturated zone (I think). This is because the wetted surface area is the same in the unsaturated and saturated zone (there is always some small film of water at soil surface). J.