01424naa a2200205 a 450000100080000000500110000800800410001910000190006024500610007926000090014052008950014965000090104465000150105365000110106865000100107965300160108965300150110570000180112077300800113817871752017-04-04       1992    bl ---       0--  u    #d1 aCARROLL, C. S.  aDefining biophysical land units for resource management.  c1992  aEl Malpais National Conservation Area in New Mexico has been selected by the Rio Puerco Resource Area of the Bureau of Land Management as a prototype for new methodologies of resource management on public lands. The landscapes are being described by delineating biophysical land units (BLUs) using an image-based geographic information system (GIS). One strenght of the BLU approach is that the GIS data for each unit can include unique themes, as well as those generic to the entire Conservation Area. This is an important to managers because there are several types of administrative units within El Mapais, each having different management criteria, while occupying or oberlapping some of the same BLU. The aiom of this paper is to present conceptual arguments for adopting the BLU as a management tool and to illustrate and describe the results of its adoption in the Conservation Area.  aland  aBiofísica  aManejo  aTerra  aBiophysical  aManagement1 aMORAIN, S. A.  tPhotogrammetric Engineering & Remote Sensinggv.58, n.8, p.1239-1244, 1992.