Non-Point Source Pollution Model from Urban Area

[mohdnaka]

Hi Grass Users,

I am doing research on non point source pollution from urbanising catchment
which considers pollution loadings from rural and urban area. While there 
are a few models around for modelling erosion and transport of sediment 
from agricultural area that have been integrated with GRASS, I wonder if there
is any NPS pollution model for urban area that have been integrated with
Grass. Any info on models that determine pollutant load from urban area are
also welcomed.

Thanks in advance for any info.

Cheers,
Kamarul