Author: Geological Survey (U.S.)Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 76
Book Description
New Publications of the Geological Survey
Author: Geological Survey (U.S.)Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 76
Book Description
New Publications of the U.S. Geological Survey
Author: Publications of the Geological Survey
Author: Geological Survey (U.S.)Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 296
Book Description
U.S. Geological Survey Professional Paper
Author: Ecological Zones in the Southern Appalachians
Author: Publisher:
ISBN:
Category : Ecological zones
Languages : en
Pages : 52
Book Description
n weathering would result in soils of low or high availability of base cations. The presence or absence of ecological zones (large areas of similar environmental conditions consisting of temperature, moisture, and fertility, which are manifested by characteristic vegetative communities) were modeled as multivariate logistic functions of climatic, topographic, and geologic variables. Accuracy of ecozone models ranged from 69- to 95-percent correct classification of sample plots; accuracy of most models was > 80 percent. The most important model variables were elevation, precipitation amount, and lithologic group. A regional map of ecological zones was developed by using a geographic information system to apply the models to a 30-m digital elevation dataset. Overall map accuracy was refined by adjusting the best probability cut levels of the logistic models based on expert knowledge and familiarity of the authors with known ecological zone boundaries throughout the study area. Prelimin
Geochemistry
Author: Geological Survey of Finland, Special Paper
Author: Geological Survey of Finland, Current Research 1997-1998
Author: Geologian tutkimuskeskus (Finland)Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 208
Book Description
Publications in Engineering
Author: Index of Conference Proceedings
Author: British Library. Document Supply CentrePublisher:
ISBN:
Category : Conference proceedings
Languages : en
Pages : 696
Book Description