Runoff Calculator Help

General Help

  • To change fields such as parcel size or impervious surface, hover over the field until a curser appears and then input your desired numbers
  • To zoom in or out on the map, click +/- buttons on the upper left hand side of the map
  • To navigate between pages, click the" continue" button or the "skip button" to move on to the next page or the "back" button to move to the previous page
     

Impervious Surface Input

This field will automatically populate with the information associated with Anne Arundel County's GIS database. If you feel this data is inaccurate or you have since added or taken out impervious surface since the data collection, you can adjust the input field.

  • To adjust the input field, hover over the field until a curser appears and then input your desired numbers

In order to measure the existing impervious surface on your property:

  • You can measure the existing areas using online mapping software such as Google Earth, Bing Maps, or Anne Arundel County's Mapping Tool
  • You can measure the area using the traditional method of measuring by hand using a tape measure
  • Informally, you can also pace off your steps keeping in mind that the "average" strip is about 5ft (2.5ft per step)