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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number D631-2

ARS soil physicist Ali Sadeghi (left) and landowner Bill Collier examine water quality in a ditch under controlled drainage management within the Choptank Watershed. This monitoring information will be used for calibration and modification of watershed models such as SWAT (Soil and Water Assessment Tool) for application to similar watersheds within the Chesapeake Bay region.

Photo by Peggy Greb.

640 pixels wide: (d631-2.jpg)

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Last Modified: 10/31/2006