The aquatic-integrity layer was created as part of the New Jersey Pinelands Commission ecological-integrity assessment (Zampella et al. 2008). Aquatic integrity, which was defined as the percentage of land in a watershed that is neither developed land nor upland agriculture based on 2002 land-use/land-cover data (NJDEP 2007) and as defined in Zampella et al. (2008), was determined for each drainage unit. The term drainage unit refers to a section of the watershed. This raster layer contains the aquatic-integrity scores for each drainage unit in the Pinelands Area. NJDEP. 2007. NJDEP land use/land cover update, watershed management areas 13-20. New Jersey Department of Environmental Protection, Office of Information Resource Management, Bureau of Geographic Information Systems, Trenton, New Jersey, USA. Zampella, R. A., N. A. Procopio, M. U. Du Brul, J. F. Bunnell. 2008. An ecological-integrity assessment of the New Jersey Pinelands: A comprehensive assessment of the landscape and aquatic and wetland systems of the region. Pinelands Commission. New Lisbon, New Jersey, USA.
Aquatic-integrity scores were used in the calculation of overall ecological-integrity scores.
April 2008
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To determine aquatic integrity, watersheds were created using NJDEP (1996) stream data, a digital-elevation model (NJDEP 2002), and Arc Hydro (ESRI 2007). Arc Hydro is a water resources tool designed to work within ArcGIS (ESRI 1999-2006). Points, referred to as pour points, were placed immediately above the confluence of streams or stream segments and the DEM was used to delineate the total area contributing stream flow to each pour point. To reduce variations in scale, streams or segments of streams that were two or more times as long as the median length of all first-order Pinelands streams were divided until they were less than twice the length of the median value. The total upstream area draining to a pour point represents the watershed. The term drainage unit refers to the portion of the watershed between pour points. Using rasterized 2002 land-use/land-cover data (NJDEP 2007), the percentage of land in a watershed that is neither developed land nor upland agriculture, as defined in Zampella et al. (2008), was determined for each watershed and assigned to the associated stream segment defined by the lower and upper pour points for that segment. The resulting aquatic-integrity score was assigned to every 10×10-m habitat and non-habitat cell in that drainage unit. ESRI. 1999-2006. ArcGIS 9.2. Environmental Systems Research Institute, Redlands, California, USA. ESRI. 2007. Arc Hydro for ArcGIS 9 Version 1.2 Beta. Environmental Systems Research Institute, Redlands, California, USA. NJDEP. 1996. New Jersey geographic information system CD-ROM, Series 1, Volumes 1-4. New Jersey Department of Environmental Protection, Office of Information Resource Management, Bureau of Geographic Information Systems, Trenton, New Jersey, USA. NJDEP. 2002. NJDEP 10-meter digital elevation grid, watershed management areas 13-20. New Jersey Department of Environmental Protection, Office of Information Resource Management, Bureau of Geographic Information Systems, Trenton, New Jersey, USA. NJDEP. 2007. NJDEP land use/land cover update, watershed management areas 13-20. New Jersey Department of Environmental Protection, Office of Information Resource Management, Bureau of Geographic Information Systems, Trenton, New Jersey, USA. Zampella, R. A., N. A. Procopio, M. U. Du Brul, J. F. Bunnell. 2008. An ecological-integrity assessment of the New Jersey Pinelands: A comprehensive assessment of the landscape and aquatic and wetland systems of the region. Pinelands Commission. New Lisbon, New Jersey, USA.
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Aquatic-integrity scores were classified into ten integrity classes, including less than or equal to 10%, 10.1-20%, 20.1-30%, 30.1-40%, 40.1-50%, 50.1-60%, 60.1-70%, 70.1-80%, 80.1-90%, 90.1-100%. Each class is identified in the raster layer by the upper limit of the class. Aquatic integrity increases from the lowest to highest integrity class.
15 Springfield Rd.
15 Springfield Road