The author will examine the effect of channel depth on the contribution of nitrogen by streams and rivers to coastal ecosystems. River boats aren't the only thing the Mississippi River transports effectively. In this study covering a 2,250-km reach, relatively little nitrate was lost from the water column. The Impact of Sustained Drought on Chesapeake Bay, Session H22C-06. Renaissance Hotel Grand N. Thomas Cronin, USGS Reston.
Drought affects the salinity, clarity, and nutrient influx of estuaries.
By analyzing major droughts in the 16th century, the author will describe the effect these changes might have on hydrologic conditions and biological communities in the Chesapeake Bay during a possible modern prolonged drought in the mid-Atlantic region. Lisa Osterman, USGS Reston. The author will describe how sediments sampled from Palmer Deep, Antarctica, document cooling of ocean waters and expansion of persistent sea ice from early to late Holocene. Judson Harvey, USGS Reston. This study describes how controls on surface-water flows in the Northern Florida Everglades by water managers seeking to reduce flooding and maintain adequate water supply have affected the movement of mercury between surface water and shallow ground water.