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National Resources Inventory: Insights into Alabama's Land Use and Erosion Trends

The National Resources Inventory (NRI), overseen by the USDA Natural Resources Conservation Service, utilizes modern aerial photography and remote sensing to collect critical data on land use patterns and erosion trends across Alabama. This statistical survey covers approximately 29 million non-federal rural acres, revealing that 73% is forested and showing significant urban development over recent decades. Key findings include shifts in cropland, pastureland, and forestland, with a focus on sustainable land management and erosion control. The NRI data underpin vital assessments and inform resource management decisions.

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National Resources Inventory: Insights into Alabama's Land Use and Erosion Trends

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  1. National Resources Inventory by Robert N. Jones State Conservationist USDA-Natural Resources Conservation Service

  2. National Erosion Reconnaissance Survey of 1934 Aerial photography is used to collect NRI data in modern surveys. Seven Decades of Resource Inventories

  3. The National Resources Inventory • Statistical survey • Conducted by Natural Resources Conservation Service (NRCS)

  4. About the Inventory Process • NRI data are collected at selected sample sites • Sample sites are located in all counties • Data are collected using photo-interpretation and other remote sensing methods • Results produce estimates

  5. Alabama Land Use29 Million Acres – Non Federal Rural Land • 73% Forest • 12% Pasture • 10% Cropland • 2% CRP • 1% Range land • 2% Other rural

  6. Land Use Change in Alabama in acres • Cropland  1,591,400 • Pastureland  221,000 • Rangeland  16,000 • Developed land  766,200 • CRP  521,900 • Forestland  302,300

  7. Urbanization and Development • Alabama Developed land in 1997– 2,409,000acres (8%) However, from 1992-97 more land was developed (445,300 acres) than during 1982-92 (320,000 acres)

  8. Forest Land • Over 21 million acres • Between 1982 and 1997, increased by 302,300

  9. What to Look for in the Future • To build a database • To increase the breadth of analyses supported by the NRI

  10. 2001 Key Findings In Million Acres 1982 2001 • Cropland 420 370 • Pastureland 131 117 • Rangeland 415 405 • Forestland 48 51 • Developed 73 108

  11. More Key Findings • Control of erosion rates sustained • Erosion on cropland  • Erosion per acre  • HEL 

  12. Summary • Statistical survey • Provides nationally consistent statistical data • Culminates in a variety of databases, assessments, publications • Useful for many purposes and at many levels

  13. Reference • National Resources Inventory website:http://www.nrcs.usda.gov/technical/NRI/

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