Skip to Main Content
A GIS-derived integrated moisture indexAuthor(s): Louis R. Iverson; Anantha M. Prasad
Source: In: Sutherland, Elaine K.; Hutchinson, Todd F., eds. Characteristics of mixed oak forest ecosystems in southern Ohio prior to the reintroduction of fire. Gen. Tech. Rep. NE-299. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 29-41
Publication Series: General Technical Report (GTR)
Station: Northeastern Research Station
PDF: View PDF (122.05 KB)
DescriptionA geographic information system (GIS) approach was used in conjunction with forest-plot data to develop an integrated moisture index (IMI) that is being used to stratify and help explain landscape-level phenomena in the four study areas. Several landscape features (a slope-aspect shading index, cumulative flow of water downslope, curvature of the landscape, and water-holding capacity of the soil) were used to create the IMI in the GIS. The IMI can be used to better manage forest resources where moisture is limiting and to predict how the resource will change under different forms of ecosystem management. In this study, the IMI was used to stratify the study areas into three moisture regimes: xeric, intermediate, and mesic. Of the 108 plots established across the four study areas (27 per study area), roughly a third fell into each of the three moisture classes. The proportion of land in each IMI class was similar among study areas. The Watch Rock site had the highest proportion area in the mesic class, while Bluegrass Ridge had the highest proportion of land in the xeric class. Among treatment areas within each study area, the distribution of IMI classes was similar, so that treatment effects can be attributed to the treatments rather than a priori landscape variation. Analysis of IMI by vegetation plot revealed that these plots well represent the entire treatment areas.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationIverson, Louis R.; Prasad, Anantha M. 2003. A GIS-derived integrated moisture index. In: Sutherland, Elaine K.; Hutchinson, Todd F., eds. Characteristics of mixed oak forest ecosystems in southern Ohio prior to the reintroduction of fire. Gen. Tech. Rep. NE-299. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 29-41
- Soil and forest floor characteristics
- Vegetation Change in Blue Oak Woodlands in California
- Bromus tectorum expansion and biodiversity loss on the Snake River Plain, southern Idaho, USA
XML: View XML