Source Contribution Tools & Methodologies

CASQA conducted a comprehensive review of existing approaches and tools for use in evaluating source contributions (outcome level 4) from key source categories and target audiences. This work effort was coordinated amongst three CASQA subcommittees (Effectiveness Assessment, Best Management Practices, and Watershed and Impaired Waters) and produced the following:

Source Contribution Tools and Methodologies Online Database

(March 2018)

As a part of the comprehensive review of existing approaches and tools for use in evaluating source contributions (outcome level 4), CASQA developed a searchable database identifying the tools that may be used to estimate or calculate the source contributions, based on the pollutants of concern / conditions of concern (POC / COC), the potential sources, and/or best management practices (BMPs) that may be implemented. This user-friendly, web-based interface allows the user to access the database through the CASQA Stormwater Effectiveness Assessment web page and obtain the desired information by entering in key input parameters. It is anticipated that the database will be updated as new information and tools are developed.

View the Online Database

Summary of the CASQA Source Contribution Tools and Methodologies Survey

(November 2017)

As a part of the comprehensive review of existing approaches and tools for use in evaluating source contributions (outcome level 4) from key source categories and target audiences, CASQA conducted a survey / literature review in Summer 2017. The survey was distributed to the CASQA membership and requested information related to the participants, sources, source controls for load reduction, pollutants of concern, source contribution determination or assessment tools, and challenges encountered when performing source assessments and estimating load reductions. A total of 85 surveys were received and evaluated. This document summarizes the results of the survey / literature review, which were used to guide the development of the Source Contribution Tools and Methodologies online database. 

View or download the survey