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 Watershed 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.

Nitrogen, phosphorus, and suspended-sediment loads are showing measurable improvement at many locations across the bay watershed from 2005 to 2014. Trends in nitrogen loads are improving at 44 of 81 (54 percent) NTN stations analyzed. The median reduction in nitrogen load, for these 44 NTN stations, is 0.68 pounds per acre or 10 percent. Trends in phosphorus loads are improving at 41 of 60 (68 percent) NTN stations analyzed. The median reduction in phosphorus load, for these 41 NTN stations, is 0.11 pounds per acre or 24.7 percent. Trends in suspended-sediment loads are improving at 29 of 59 (49 percent) NTN stations analyzed. The medina reduction in suspended-sediment load, for these 29 NTN stations, is 221 pounds per acre or 29.4 percent.

Doug Moyer
USGS
dlmoyer@usgs.gov
USGS Watershed 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.

Nitrogen, phosphorus, and suspended-sediment loads are showing measurable improvement at many locations across the bay watershed from 2005 to 2014. Trends in nitrogen loads are improving at 44 of 81 (54 percent) NTN stations analyzed. The median reduction in nitrogen load, for these 44 NTN stations, is 0.68 pounds per acre or 10 percent. Trends in phosphorus loads are improving at 41 of 60 (68 percent) NTN stations analyzed. The median reduction in phosphorus load, for these 41 NTN stations, is 0.11 pounds per acre or 24.7 percent. Trends in suspended-sediment loads are improving at 29 of 59 (49 percent) NTN stations analyzed. The medina reduction in suspended-sediment load, for these 29 NTN stations, is 221 pounds per acre or 29.4 percent.



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 ()