Maryland's Green Infrastructure Assessment:
A Comprehensive Strategy for Land Conservation and Restoration
Like many parts of the U.S., Maryland is urbanizing rapidly. The scattered pattern of modern low-density development consumes an excessive amount of land, fragments the landscape, displaces many native species, and disrupts ecosystem functions. Maryland's Green Infrastructure Assessment is a tool developed to help identify and prioritize those areas of greatest statewide ecological importance, as well as those at greatest risk of loss to development. It identifies large contiguous blocks of natural land (hubs), interconnected by corridors to allow animal and plant propagule dispersal and migration. Hubs and corridors were ranked within their physiographic region for a variety of ecological parameters and for development risk factors, as well as combinations of these. Prioritization was also done on a finer scale (approximately a third of an acre) for ecological importance and vulnerability to development, allowing a more detailed analysis for site prioritization within the network. Model output was reviewed by field ecologists and county planners, and compared to other habitat delineations and reserve systems. Also, human-disturbed areas (e.g., gaps) within hubs and corridors were prioritized for restoration efforts, according to the relative ecological benefits and reclamation ease. In 2001, the State of Maryland established the GreenPrint program, which earmarked funds specifically to protect land in the Green Infrastructure network, where willing sellers existed. To prioritize for this or other funding initiatives, individual parcels are evaluated for their relative conservation value, using a four-tiered combination of GIS, aerial, and field assessment. A parallel effort is being developed for restoration projects.
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Maryland's Green Infrastructure Assessment (16,950 KB PDF file)
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a Pages File Size Cover Page and Table of Contents 415 KB Chapter 1 General Overview 1 - 8 123 KB Chapter 2 Background 9 - 46 790 KB Chapter 3 Study Area and Methodology Overview 47 - 49 122 KB Chapter 4 Identification of the Network 50 - 67 1,589 KB Chapter 5 Ecological Ranking of Hubs and Corridors 68 - 91 602 KB Ranking Threats to Maintaining Green Infrastructure Part 1 92 - 103 1,286 KB Part 2 104 - 112 1,511 KB Chapter 7 Coordinating Land Use and Conservation Efforts 113 - 118 415 KB Chapter 8 Fine Scale Ecological Ranking 119 - 131 1,582 KB Chapter 9 Fine Scale Evaluation of Development Risk 132 - 136 932 KB Chapter 10 Desktop Parcel Evaluation 137 - 148 908 KB Field Evaluation of Parcels Part 1 149 - 158 1,848 KB Part 2 159 - 160 1,660 KB Part 3 161 - 162 1,329 KB Part 4 163 - 184 1,009 KB Restoration and Management Part 1 185 - 202 1,922 KB Part 2 203 - 225 920 KB Chapter 13 Future Directions 226 - 228 108 KB Literature Cited 229 - 246 104 KB
a File Size Appendix A GIS Data Sources Used in the Green Infrastructure 82 KB Appendix B Maryland's Green Infrastructure Assessment: Detailed GIS Methods 661 KB Appendix C List of Plot Sites Used to Create Initial Field Assessment Protocol 122 KB Appendix D Original Data Sheets Used to Create Field Assessment Protocol 469 KB Appendix E Amended Data Sheets for Greenprint Evaluation 948 KB Appendix F Distribution of Overall Community Scores and Categories After Analyzing Data Collected During Summer-Fall 2001 119 KB Appendix G Ankeney Property (parcel on the Neck only) 771 KB Appendix H Avilton Woods (for boundaries submitted 8 July 2002) 566 KB Appendix I Donnelly Property 50 KB Appendix J Jacoby Property 732 KB Appendix K Miller Property (Wolf Swamp) 389 KB
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© 2003 Maryland Department of Natural Resources