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Welcome to the NRCS Wetland Science Institute (WLI) web site.

Using a Regional Index of Biotic Integrity (IBI) to Characterize the Condition of Northern Virginia Streams, With Emphasis on the Occoquan Watershed: A Case Study

Using a Regional Index of Biotic Integrity (IBI) to Characterize the Condition of Northern Virginia Streams, With Emphasis on the Occoquan Watershed: A Case Study

In his 1998 State of the Union Address, President Clinton announced a major new Clean Water Initiative to speed the restoration of the Nation's waterways (EPA 1998). This new initiative aims to achieve clean water by strengthening public health protections, targeting community-based watershed protection efforts at high priority areas, and providing communities with new resources to control polluted runoff.
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Cover of Field Indicators of Hydric Soils in the United States

Field Indicators of Hydric Soils in the United States 

This guide will help identify and delineate hydric soils in the field.  Indicators are not intended to replace or relieve the requirements contained in the definition of a hydric soil.  The list of Indicators is considered to be dynamic; changes and additions are anticipated annually.
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