Subsurface flow through a sideslope of a hillslope

Subsurface flow through a sideslope of a hillslope

I'm looking for advice on how to consider flow through an element of a sideslope which drains into a hillslope channel.

The general conceptual model is a layered soil of varying hydraulic conductivities overlying a bedrock layer, which I'm assuming to be impermeable boundary. I'm trying to calculate the flow through an element of this layer towards the channel as a result of infiltration from rainfall directly onto the sideslope and also flow from the main hillslope into this sideslope.

I've attempted to consider saturated conditions to allow Darcy's Law to be used but the results are not satisfactory and I believe I need to consider unsaturated conditions (Richard's Eq?)

I have considered solving it iteratively using excel under different moisture contents and associated 'K' values but if someone has a better solution or knows of a 'free' software that will let me set up a simple hydro model, that would be appreciated.

Submitted August 07, 2017 at 07:42AM by JD-Cooper
via reddit http://ift.tt/2vxcOG6

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Subsurface flow through a sideslope of a hillslope

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