Umpqua Watersheds
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Glossary
Glossary Abbreviations

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  Glossary   D
DBH (diameter at breast height)
The diameter of a tree 4 and 1/2 feet above the ground on the uphill side of the tree.
DEIS (Draft Environmental Impact Statement)
The draft version of the Environmental Impact Statement that is released to the public and other agencies for review and comment.
DEMO (Demonstration of Ecosystem Management)
The DEMO project is a forest service study to determine the effects of logging on the old-growth characteristics of a forest. 4 areas were chosen in the Gifford-Pinchot and 4 in the Umpqua National Forest. Of the areas in the Umpqua, two are in Diamond Lake, one in Cottage Grove, and one in N. Umpqua. The one in N. Umpqua has been withdrawn by the Forest Service, Little River DEMO. Each area has 6 timber sale units, each with a different kind of logging prescription. At least two out of the six will have 85% of the trees removed. That makes a virtual clearcut on 16 units in DEMO. Our main objection to DEMO is, do they really need to do deforestation to test the effects on old-growth characteristics?
Density Management
The cutting of trees for the purpose of widening their spacing so that growth of remaining trees can be accelerated.
Desired future condition
Land or resource conditions that are expected to result if goals and objectives are fully achieved.
Developed recreation
Recreation that requires facilities that, in turn, result in concentrated use of the area. For example, ORVers require, parking lots and trails. Campgrounds require roads, picnic tables, and toilet facilities.
Dispersed recreation
Recreation that does not occur in a developed recreation site, such as hunting, backpacking, and scenic driving.
District Manager
The official responsible for administering BLM lands on entire the district. The District Manger for the Roseburg BLM district is Cary Osterhaus. (See 'Forest Supervisor' for the USFS equivalent.)
Disturbance
Any event, such as forest fire, insect infestations or clear cut that alter the structure, composition, or functions of an ecosystem.

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