IAN Seminar Series 2017

The goal of the IAN seminar series is to provide concise, thought-provoking ideas relating to Chesapeake Bay science and management. Short presentations (15 minutes maximum length) are immediately followed by a lunchtime discussion of the topics raised by the presenter. The discussion is summarized and is posted along with a pdf version of the seminar slides. The seminars are captured on video and posted under a Creative Commons license so they can be freely shared.

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DateSpeakerSeminarSeries
Thu 25
Feb
2016
http://ian.umces.edu/seminarseries/
USGS River Input Monitoring Results - Doug Moyer (USGS) - IAN Seminar Series
2016-02-25T12:00:00-05:00 2016-02-25T13:00:00-05:00
Macknis Room, Chesapeake Bay Program Office, 410 Severn Avenue (Suite 109), Annapolis MD

The U.S. Geological Survey (USGS), as a partner of the Chesapeake Bay Program, is responsible for determining the extent to which nitrogen, phosphorus, and suspended-sediment loads delivered to bay from the monitored-nontidal portions of the bay watershed. This is accomplished by analyzing water-quality observations from the nine River-Input Monitoring (RIM) stations to estimate nitrogen, phosphorus, and suspended-sediment annual loads and trends using Weighted Regressions on Time, Discharge, and Season (WRTDS). The resulting trends in nitrogen, phosphorus, and sediment loads are flow normalized to account for the year-to-year variation in river discharge; thus, the remaining trend is a result of changing sources, delays associated with storage or transport of historical inputs, and/or implemented reduction strategies.

Long-term (1985-2014) trends in nitrogen loads indicate improving conditions at the 7 of 9 RIM stations, including the five largest rivers. The Choptank River is the only station whose data indicate degrading conditions. Short-term (2005-2014) trends in total nitrogen loads indicate improving conditions at only 3 stations and degrading conditions at 4 stations. Results from the Susquehanna and James stations indicate no discernable short-term trends. Long-term trends in total phosphorus loads indicate improving conditions at 4 stations and degrading conditions at another 4 stations. Short-term trends in total phosphorus loads indicate improving conditions at only the Potomac and Patuxent stations, degrading conditions at 4 stations, and no discernable change in conditions at the 3 remaining stations.

Doug Moyer
USGS
dlmoyer@usgs.gov
USGS River Input Monitoring Results

Science for Citizens
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Abstract

The U.S. Geological Survey (USGS), as a partner of the Chesapeake Bay Program, is responsible for determining the extent to which nitrogen, phosphorus, and suspended-sediment loads delivered to bay from the monitored-nontidal portions of the bay watershed. This is accomplished by analyzing water-quality observations from the nine River-Input Monitoring (RIM) stations to estimate nitrogen, phosphorus, and suspended-sediment annual loads and trends using Weighted Regressions on Time, Discharge, and Season (WRTDS). The resulting trends in nitrogen, phosphorus, and sediment loads are flow normalized to account for the year-to-year variation in river discharge; thus, the remaining trend is a result of changing sources, delays associated with storage or transport of historical inputs, and/or implemented reduction strategies.

Long-term (1985-2014) trends in nitrogen loads indicate improving conditions at the 7 of 9 RIM stations, including the five largest rivers. The Choptank River is the only station whose data indicate degrading conditions. Short-term (2005-2014) trends in total nitrogen loads indicate improving conditions at only 3 stations and degrading conditions at 4 stations. Results from the Susquehanna and James stations indicate no discernable short-term trends. Long-term trends in total phosphorus loads indicate improving conditions at 4 stations and degrading conditions at another 4 stations. Short-term trends in total phosphorus loads indicate improving conditions at only the Potomac and Patuxent stations, degrading conditions at 4 stations, and no discernable change in conditions at the 3 remaining stations.



Time and Venue

Seminars start at 12 noon, scheduled for 45 mins (15 mins plus 30 min question/discussion time).

Science for Citizens seminars are held in the Joe Macknis Conference Room (Fish Shack) at the Chesapeake Bay Program Office, 410 Severn Avenue, Annapolis MD 21403, immediately following the monthly meetings of the Science Technical Analysis and Reporting (STAR) team meetings.

Citizens for Science seminars are conducted at the UMCES Annapolis Office, 1 Park Place, Suite 325, Annapolis, MD 21401.



Inquiries

If you have any queries or would like to contribute to next year's seminar series, please contact:

Jane Thomas ()
Bill Dennison ()