Encompassing the Virtual Watershed

As we get bombarded with news of tragic global warming and climate change in general, it becomes more and more irresponsible to discuss the man-made world without considering the natural. So, I am sold on the idea that any virtual city had better be clearly modeled on the virtual watershed. The EPA provides a Surf Your Watershed application and the USGS provides some lovely GIS Watershed Layers in a KML format (nice for Google Earth presentation). The next step is to generate a complete 3-D model and place our cities within the watershed so we can better appreciate how much we affect the natural world with our building.