Accomack-Northampton Planning District Commission
Seaside SAMP: Buildout analysis using Community Viz
Project Description as Proposed:
Two years ago the Delaware, Maryland and Virginia CZM Programs and their Atlantic coast County members formed an organization called DAWN - the Delmarva Atlantic Watershed Network. A few workshops were held and the group agreed that to move forward with a regional plan, each county would need a build-out analysis that would show how each county would look if it fully built out based on current zoning allowances.
Recently the Maryland CZM Program, through its "Coastal Bays Program" hired a consultant, Donley & Associates in Colorado Springs, to do such an analysis for DAWN. Each county, with the help of its CZM Program is pulling together relevant data layers for blue and green infrastructure, grey infrastructure (roads, sewer services, impervious surfaces, etc.) as well as zoning, so that the consultant can feed it into the CommunityViz software (see http://communityviz.com/ ). Each county will have its own copy of CommunityViz on a dedicated computer within the county offices. After the build-out analyses are completed, DAWN will conduct a Technical Workshop (date to be determined) at which the analyses are reviewed at the regional level.
Donley & Associates Inc. will use CommunityViz to complete the following:
1. Generate a numeric Build-out analysis from the original data. Build-out uses zoning densities and development constraints to calculate the supply of dwelling units and non-residential space.
2. Run Common Indicators based on the results of the build-out
3. Calculate site impacts based on acres of overlapping land by county
4. Use land use multipliers to estimate water quality impacts by sub watershed
5. Summarize downstream impacts using hierarchical watershed
6. Create one alternative scenario for each county
7. Present projects using WebEx and incorporate revisions
8. Document the model - including web reports, basic presentation techniques and guidance on revising inputs. Present the models at the workshop.
Donley & Associates Inc. will use CommunityViz GIS-driven software for estimating build-out and the associated water resource impacts for Worcester (MD), Accomack (VA), Sussex (DE) and Northampton (VA) counties. The project will support the Delmarva Atlantic Watershed Network (DAWN) of the Maryland Coastal Bays Program.
Scope of Work
1) Generate a numeric Build-out analysis from the original data. Build-out uses zoning densities and development constraints to calculate the supply of dwelling units and non-residential space.
a) Utilize local zoning density rules
b) Remove unbuildable areas (simplified as needed for processing)
c) Account for existing development (from attributed parcels or structures)
d) Assign development to septic or central sewage systems or spray irrigation
e) Summarize by sub watershed
2) Run Common Indicators based on the results of the build-out.
a) Demographic, (population, labor force)
b) Environmental (auto emissions, energy usage)
c) Infrastructure (students, vehicle trips, residential water demand)
3) Calculate site impacts based acres of overlapping land by county (for 6 layers)
a) Prime Agricultural soils
b) Rare/threatened and endangered species
c) Green infrastructure
d) Nature tourism sites/canoe-bike-birding trails/public access
4) Use land use multipliers to estimate water quality impacts by sub watershed. Client will provide density/acreage multipliers.
a) Impervious Surface
5) Summarize downstream impacts using hierarchical watershed
a) Aquaculture operations
b) Blue infrastructure
6) Create one alternative scenario for each county with the one of the following or other adjustments
a) Density reductions
b) TDR (Transfer of Development Rights)
c) Conservation land acquisition
d) Sea level rise
7) Present projects using WebEx and incorporate revisions
8) Document the model. This includes producing web reports, basic presentation techniques and guidance on revising the inputs. Provide 8 hours of technical support (e.g. 2 hour/ county) after the workshop (Task 9).
9) Present the models at the summer workshop. Conduct one day training on presenting the model.
Matt Cook, (757) 787-2936; email@example.com
10/01/07 - 9/30/07; Project Completed
Final Product Received:
Accomack-Northampton Planning District Commission Coastal Technical Assistance Program 2007 (PDF)
Project Summary Provided by Grantee:
The A-NPDC hosted a public forum highlighting planning tools that allowed the community to envision current and future growth and land use decisions. The A-NPDC also assisted with the cost to provide 25 hours of Community Viz training to Northampton County staff and an Accomack County planning employee. The forum was held at the Eastern Shore of Virginia Community College on June 11, 2008 in their large auditorium. Staff from both counties as well as local institutions and citizens were present for the forum. Mr. Chuck Donley, who completed the build-out model for the two counties, presented information as well as Paige G. Ross from VIMS. Mr. Ross presented research funded by another CZM grant (FY 2005 Task 92.07) concerning the impacts of land use and development on Eastern Shore of Virginia water quality and marine resources. Mr. Donley demonstrated live build-out scenarios with Community Viz software and received positive feedback from the audience. There was a tremendous amount of questions regarding future build-out and the rezoning of Northampton county. Though Mr. Donley did not discuss the politics involved in rezoning, many of the questions focused on the political implications.
Disclaimer: This project summary provides the federal dollars initially awarded to the grantee. Due to underexpenditure or reprogramming of grant funds, this figure may change. For more information on the allocation of coastal grant funds, please contact Laura McKay, Virginia Coastal Program Manager, at 804.698.4323 or email: Laura.McKay@deq.virginia.gov
A more detailed Scope of Work for this project is available. Please direct your request for a copy to Virginia.Witmer@deq.virginia.gov