Maryland Rivers Shown on the Map: Chester River, Choptank River, Monocacy River, Nanticoke River, Patuxent River, Pocomoke River, Potomac River and Youghiogheny River.
Maryland Lakes Shown on the Map: Deep Creek Lake, Liberty Lake, Loch Raven Reservoir, Prettyboy Reservoir and Triadelphia Reservoir.
Maryland Stream and River Levels
The United States Geological Survey has a number of stream gages located throughout Maryland. These estimate stream levels, discharges and record them over time. This data is published on the web and many stations allow users to plot custom graphs. Get updated Maryland river and stream levels from USGS here.
Maryland Stream and River Level Alerts
The United States Geological Survey has a system that will send you an email message when flood levels are reached on any steam with USGS gaging equipment that you have selected. Sign up here to recieve Maryland stream and river level alerts.
Maryland Drought Map
The United States Geological Survey publishes updated drought maps on their website. There you can view a map that shows where below normal 7-day average stream flow conditions were recently recorded. The maps are updated daily. Get a current Maryland drought map here.
Maryland Water Publications
The United States Geological Survey has a number of publications related to water use and water resources in Maryland. Visit the Maryland-Delaware-D.C. Water Science Center here.
Maryland Elevation Map
The topography of an area determines the direction of stream flow and often is a primary influence on the geographic distribution of precipitation. View a detailed Maryland elevation map.