05-08-10 Road and Salt Tracer

Introduced new preliminary submodel for Roads

In SaltTracer module a new emission model was introduced that estimate the salt emission from the road by 3 different main mechanisms. (1) By particle transport driven by wind and turbulence, (2) by snow ploughing and (3) by surface water flow. The three emissions are represented by the variables:

Salt AirEmission, Salt PloughEmission and

Salt RunoffEmission. New parameters introduced are

SaltRunOffEffCoef and SaltPloughEffCoef.

In Snow module a new ploughing model was introduced to make export of snow by ploughing when the total snow mass exceeds a certain threshold that is set by the parameter PloughSnowMass. The efficiency of ploughing is controlled by a corresponding parameter PloughEffSnow. The exported amount of Snow is represented by the Flow variable SnowExport.      PEJ