Tucson Basin - Pima County, Arizona
Maps providing an overview of the relationship between physiography, drainage, and precipitation:
Shaded Relief Map - Shaded relief map with major drainages.
Annual Precipitation Map - Average annual precipitation (1971-2000). 
1-year, 2-hour Precipitation Map - Total precipitation for 2-hour duration storm event, recurring on average once every year.
2-year, 12-hour Precipitation Map - Total precipitation for a 12-hour duration storm event, recurring on average once every 2 years.   
Major Drainages and Bank Protection - Major drainages by flow rate and areas with channelized flow ("bank protection")
Neighborhood Resource & Planning Maps
Storm water Runoff - Mountain/1st Neighborhood - Simple use of a topographic contour map to understand general urban runoff patterns.
Pedestrian & Bike Routes - Mountain/1st Neighborhood - Includes sidewalks, bike routes, bus stops, and traffic calming.