Skip common site navigation and headers
United States Environmental Protection Agency
Exposure Research
Begin Hierarchical Links EPA Home > Research & Development > Exposure Research > Publications/Presentations > End Hierarchical Links

 

Integrating Landscape and Hydrologic Analysis for Watershed Assessment in An American Semi-Arid Bioregion

spacer
spacer
Abstract:The objective of this study is to demonstrate the application of operational hydrologic modeling and landscape assessment tools to investigate the temporal and spatial effects of varying levels of anthropogenic disturbance in a semi-arid catchment and examine the consequences of landscape change on runoff volume and soil erosion.

We integrated landscape metrics generated from readily available spatial data with a hydrologic model to examine the temporal and spatial effects of varying levels of anthropogenic disturbance between 1973 and 1997 in the Upper San Pedro River in southeastern Arizona. Landscape pattern analysis was conducted on a sub-catchment basis with emphasis on different levels of human use. Landscape metrics were associated with landscape characteristics, human stressors, and physical characteristics at each sub- catchment and for four temporal land use layers (1973, 1986, 1992, and 1997). Chronological changes were then examined relative to catchment condition variables using two hydrological models to perform multi-scale watershed assessment for a variety of outputs such as runoff depth, runoff discharge, and erosion rates at the sub-catchment scale. The results were particularly useful for assessing the effects of anthropogenic disturbance in the catchment area over a period of 25 years and for identifying sub- catchments that require critical management attention.
spacer
Citation:Kepner, W. G., M. Hernandez, D. J. Semmens, D. W. Ebert, D. C. Goodrich, and S. N. Miller. Integrating Landscape and Hydrologic Analysis for Watershed Assessment in An American Semi-Arid Bioregion. Presented at 6th International Association for Landscape Ecology World Congress, Darwin, Australia, July 13-17, 2003.
spacer
spacer
Contact: Chris Siebert - (702) 798-2234 or siebert.christopher@epa.gov
spacer
Division: Environmental Sciences Division
spacer
Branch: Landscape Ecology Branch
spacer
Product Type: Abstrct/Oral
spacer
Presented: 07/13/2003
spacer
Related Entries:
spacer
Bullet Item Development of Landscape Indicators for Use in Regional Ecological Risk Assessments
spacer Relationship Reason:   A Project of the Product
spacer
spacer
spacer

 

ORD Home | Search EPA | Search NERL | Search EIMS | Contacts | Help

 
Begin Site Footer

EPA Home | Privacy and Security Notice | Contact Us

Last Updated on Monday, October 22, 2007
URL: http://cfpub.epa.gov