Paper No. JAWRA-13-0060-P of the Journal of the American Water Resources Association (JAWRA).
Featured Collection: Contaminants of Emerging Concern II William Battaglin and Alan Kolok - Guest Editors
The Hourglass: A Conceptual Framework for the Transport of Biologically Active Compounds from Agricultural Landscapes†
Article first published online: 1 APR 2014
© 2014 American Water Resources Association
JAWRA Journal of the American Water Resources Association
Volume 50, Issue 2, pages 266–274, April 2014
How to Cite
2014. The Hourglass: A Conceptual Framework for the Transport of Biologically Active Compounds from Agricultural Landscapes. Journal of the American Water Resources Association (JAWRA) 50(2): 266-274. DOI: 10.1111/jawr.12158, , , , and ,
Discussions are open until six months from print publication.
- Issue published online: 1 APR 2014
- Article first published online: 1 APR 2014
- Manuscript Accepted: 10 JUN 2013
- Manuscript Received: 5 MAR 2013
- National Science Foundation. Grant Number: 0966858, 0966850
- biologically active compounds;
- endocrine disruptive activity;
Recent research has suggested that the fate of biologically active compounds (BACs) originating from point sources such as wastewater treatment plants is fundamentally different from that of similar compounds released from nonpoint sources through runoff from agricultural landscapes. Downstream from wastewater treatment plants, BACs will degrade via a variety of mechanisms; however, their concentration in the water adjacent to the point of discharge may not decrease over time, as the compounds are continually released. In contrast, in agricultural systems, BACs are episodically introduced to surface water during snowmelt and rainstorm events, and under these circumstances, may be found in water for only hours or days after a storm event. Recent research in our laboratories as well as others, has suggested that sediments play an important role in the persistence of herbicides and steroids in watersheds after nonpoint source loading events. Conceptually, the sediment serves as both a sink and a source, equilibrating with BACs during storm events then slowly releasing them back into the water over time, long after the initial pulse of chemicals has moved downstream.