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Ability to Produce Clean and Abundant Water - version 2 2016

Authors: Abigail Weinberg, Open Space Institute, Director of Research
Owners: Delaware River Watershed Initiative
Resource type:Composite Resource
Created:Nov 17, 2018 at 6:23 p.m.
Last updated: Nov 17, 2018 at 6:23 p.m. by Delaware River Watershed Initiative


In the original APCAW (v2) the Open Space Institute (OSI) sought to develop a metric to measure the relative capacity of small scale (HUC12) watersheds to produce clean surface and ground water. In 2014, two different HUC12-based metrics (i.e., “Ability to Produce Good Quality Surface Water” and “Ability to Produce Good Quality Ground Water”) were calculated and used by OSI to evaluate land protection projects. In 2015, OSI combined these two metrics into one metric that considers watershed conditions (e.g. land cover, terrain, and hydrology) and their effects on the abundance and quality of surface and ground water within a reasonably-sized watershed (i.e., HUC12 boundary). The revised index the APCAWv2 makes a number of changes to the original work, notably watershed boundaries are now based on the National Hydrography Dataset Plus version 2 Horizon Systems and EPA. The NHDplusv2 lateral drainage areas were originally defined by the USGS 1:100 k watershed boundaries. For more information on the spatial boundaries used in this analysis .

This data is hosted at, and may be downloaded or accessed from PASDA, the Pennsylvania Spatial Data Access Geospatial Data Clearinghouse http://www.pasda.psu.edu/uci/DataSummary.aspx?dataset=1613

Subject Keywords

geoscientificinformation,delaware river watershed initiative,ability to produce clean and abundant water,planningcadastre,inlandwaters,environment,drexel university,academy of natural sciences,penn state university,modified nested set index.,open space institute

How to cite

Abigail Weinberg, Open Space Institute, Director of Research (2018). Ability to Produce Clean and Abundant Water - version 2 2016, HydroShare, http://www.hydroshare.org/resource/3c03599302be4ce6a8ab83829f765504

This resource is shared under the Creative Commons Attribution CC BY.


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  • Public Resource  Public
  • Sharable Resource  Shareable



 Coordinate System/Geographic Projection:  WGS 84 EPSG:4326
 Coordinate Units:  Decimal degrees
North Latitude
East Longitude
South Latitude
West Longitude


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Name Organization Address Phone Author Identifiers
Abigail Weinberg, Open Space Institute, Director of Research


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