Abstract

Knotweed Survey, Control, and Monitoring Using Python and Network Analyst
Track: Environmental Management
Authors: Jason Taylor

Knotweed is identified as a class B noxious weed and a threat to important ecosystem integrity. In accordance with the Action Agenda outlined by the Puget Sound Partnership to improve water quality and habitat, this project works to identify areas and implement control procedures within the Samish River watershed that are inhabited by Knotweed species. Accurate plant survey techniques are performed using Network Analyst, controlled through Python scripting, on drainage line data, produced from Arc Hydro. Knotweed patch size, location, and density are processed in a similar way.

Using Python simplifies the daily data processing and ensures repeatability. It also enables the data processing to be performed by non-GIS users through terminal prompts or as an imported script to Arc Toolbox.