![]() ![]() Landscape of technical, strategic, permitting, and ground-mounted PV site development Professionals, and solar industry representatives. The task force is made up of individuals who representĪ variety of views and stakeholder groups, including water quality experts, stormwater The PV-SMaRT water quality task force works closely with the project team to provideįeedback and guidance on the technical analysis, modeling, validation, and creation Equipment was installed in September 2020 and will operate for 2 years. ![]() It's a flat site with sandyĬlay soil, mowed cover crops, a high-diversity pollinator mix, and 49 in. Georgia's site has a 1.3-MW DC, tracking, one-in-portrait PV array. Was installed in September 2020 and will operate for 2 years. It has clay soilĪnd pollinator-friendly vegetation and receives 16 in. In August 2020 and will operate for 2 years.Ĭolorado's site has a 1-MW DC, tracking, one-in-portrait PV array. It's a flat site with clay soil,Ī diverse pollinator seed mix, and 16 in. Oregon's site has a 9.9-MW DC, tracking, two-in-portrait PV array. Equipment was installed in June 2020 and will operate for Loam soil with a tall grass and clover mix, is ungrazed or grazed by sheep, and receivesĤ9 in. New York's site has an 18-MW DC, fixed-mount, two-in-portrait PV array. Equipment was installed in June 2020 and will operate for 2 years. With a pollinator mix dominated by black-eyed Susan daisies and receives 37 in. Minnesota's site has a 3.4-megawatt (MW) DC, fixed-mount, two-in-portrait PV array. Site vegetation density, speciation and rooting depth, precipitation, and drip edge The unique conditions at each siteĪre being characterized, and measurements are being taken of soil infiltration, runoff, Slopes, soil types, and geographical locations. These sites represent a range of elevations, Study stormwater infiltration and runoff. The PV-SMaRT project is using five ground-mounted PV sites in the United States to To learn how to use the calculator, watch this recording of a webinar hosted by Fresh Energy. Presence or absence of solar arrays, spacing of solar arrays, type of ground cover, In 24-hour design storms, soil textures, crop rooting depth, soil bulk densities, Numerical model for stormwater runoff based on specific combinations of a wide range Solar arrays, and vegetation that included pollinators, grass, or cover crops.Ĭlimatic and hydrologic field measurements at each site were used to develop a two-dimensional On research and hydrologic modeling conducted at a set of research sites featuringĭiverse climatic, topographic, and soil conditions, with either fixed or tracking PV-SMaRT has developed an easy-to-use calculator to estimate stormwater runoff from ground-mounted PV arrays. These factors are drawn from the report Best Practices: Photovoltaic Stormwater Management Research and Testing (PV-SMaRT), published by the Great Plains Institute, a PV-SMaRT partner. Ground cover-installing, establishing, and maintaining appropriate vegetated groundĬover between and under the arrays to facilitate infiltrationĭisconnection-ensuring appropriate distance between arrays for infiltration. Soil depth-including soil depth (rooting depth) in stormwater modeling and design In stormwater management and water quality permitting for PV arrays (in order of greatestĬompaction-managing soil compaction and bulk density across the site PV-SMaRT's research and modeling highlight four factors that should be considered ![]() Through its research and analysis, the PV-SMaRT project aims to address the stormwaterĪnd water quality challenges facing PV facilities in most jurisdictions. When they attempt to evaluate applications for risks and opportunities associated Permitting process also often lacks accuracy and leaves unanswered questions for jurisdictions Leased or purchased for stormwater mitigation measures, such as detention ponds. ![]() Not designed for ground-mounted PV, the stormwater permitting process can impose costlyĪdditional stormwater infrastructure requirements. Than acting like a paved surface, rainwater can generally infiltrate under elevatedīecause current stormwater runoff models used by local and state jurisdictions were Surfaces or surfaces that do not allow water to soak into the ground. Many jurisdictions treat ground-mounted PV facilities as predominantly impervious To achieve PV-SMaRT's goal, NREL is partnering with the University of Minnesota, Great Plains Institute, and Fresh Energy. The Photovoltaic Stormwater Management Research and Testing (PV-SMaRT) project isĭeveloping and disseminating research-based, PV-specific tools and best practicesįor stormwater management and water quality at ground-mounted PV sites. Photo from Scott McArt, Cornell University PV-SMaRT field-testing equipment monitoring underground soil moisture at a New York ![]()
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