Location: Southwest Watershed Research2013 Annual Report
1a. Objectives (from AD-416):
Establish a scientifically defensible means of representing and modeling the effects of Clean Water Act-related stream-channel and stormwater management actions at a basin scale, and then to evaluate the cumulative basin-wide sensitivity to alternative management practices resulting from multiple permit applications and/or future landscape scenarios.
1b. Approach (from AD-416):
Approach: (1) Incorporate the ability to emulate different growth scenarios, (2) incorporate tools and parameter sets that will support the modeling of different best management practices, (3) provide a complete spatial database for the entire San Pedro River basin and (4) provide training to EPA Regional and ORD personnel on use of the modified AGWA tool.
3. Progress Report:
This project contributes to objective 3 of the in-house project, "Develop improved watershed model components and decision support systems that more fully utilize and assimilate economic and remotely sensed data for parameterization, calibration and model state adjustment". In FY13, a final report on methodology developed to incorporate projected land cover change projections from 2010 to 2100 on ten-year increments derived from several growth and immigration scenarios developed by the Environmental Protection Agency (EPA), Integrated Climate and Land Use Scenarios (ICLUS) project was completed. The procedure was demonstrated on the San Pedro River Basin in southeast Arizona and the projected growth and associated land use change impacts on watershed response were demonstrated with the Automated Geospatial Watershed Assessment (AGWA) tool for a number of model output (runoff, erosion, sediment yield, etc.) from the current (2010) condition to each of the decadal projected land covers for one of the growth scenarios. The final report was reviewed by both the EPA and ARS and was issued as an EPA technical report. In addition, version 3.0 of AGWA was also reviewed according to ARS and EPA procedures and formally released on ARS and EPA web sites. A literature review, Low-Impact Development (LID) methods was completed, and the KINEROS2 watershed model within AGWA was modified to represent: 1) Pervious or infiltration pavement, 2) Rain water harvesting; and, 3) green or infiltrating drainage channels.