Developing a Site Selection Tool Using GIS and Grapes As a Model System
Horticultural Crops Research
2011 Annual Report
1a.Objectives (from AD-416)
Compile a GIS database of existing grape production areas in the inland Pacific Northwest (PNW; WA, OR, ID).
2. Evaluate inland PNW production areas for site suitability to different grape species/varietals.
3. Establish GIS for grape site potential selection.
1b.Approach (from AD-416)
This project proposes to utilize Geographic Information System (GIS) technology to evaluate site selection criteria for variety specific grape suitability in inland areas of the three Pacific Northwest states Idaho, Oregon, and Washington. Existing data can be compiled into data layers in the GIS and GIS tools will also be used to calculate additional layers. Once compiled, data in the GIS base will be extensively analyzed and compared with information from existing literature on both species and varieties and their historical site optima – largely temperature and latitude criteria (e.g. Gladstones, 1992; Jackson and Shuster, 2001) and soil texture and depth. This will provide a first iteration of site potential by species and variety. The data will be further refined by gathering data on both successful and unsuccessful variety establishment in existing vineyards in these growing regions using a standardized method of measurement to evaluate varietal success. Upon completion of development of the viticulture site selection GIS database, there is the potential to develop a website will be for public access to this information.
We have spatial representations of American Viticultural Areas in the inland Pacific Northwest and a GIS database of site suitability layers for the region. Validation efforts thus far are limited and very preliminary. A preliminary model will be made available to WSU research and extension personnel in the autumn of 2011 for validation and use. Methods of project monitoring included meetings, e-mail, and phone calls.