Implemented a new snow interception module and fixed segfault issue when running crhm-cli

[acebulsk]

A new snow interception module CanopyVectorBased has been added which is described in detail in the manuscript which has been submitted to the Hydrological Processes journal (Cebulski & Pomeroy) available here.

General Description of CanopyVectorBased

• Calculates initial interception before unloading as a function of snow-leaf contact area
• Snow-leaf contact area is calculated as a function of hydrometeor fall velocity and horizontal wind speed and the canopy closure from nadir
• The parameters in this module were derrived from observations at Fortress Mountain around the Powerline and Forest Tower stations

A switch parameter set in the prj file controls the ablation parameterization used in the CanopyVectorBased module:

• SublimationSwitch == 1 turns on canopy snow sublimation using Pomeroy et al., (1998)
• SublimationSwitch == 0 turns off sublimation of canopy snow for testing
• MassUnloadingSwitch == 0 is the mass unloading portion of the latest iteration of the Hedstrom & Pomeroy 1998 unloading with modifications by Ellis et al. (2010) and Floyd (2012)
• MassUnloadingSwitch == 1 are the new ablation parameterisations developed at fortress mountain based on wind speed, duration, and air temperature.

TODO

• Still need to partition drip from mass unloading here in the air temp function
• Implement melt of canopy snow adapted from CLASS or the existing CRHM module PSPnew which currently does not work

Other Important Changes

#460 appears to be resolved for now.