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Maryland-Delaware-D.C. Water Science Center

Welcome to the USGS Water Science Center serving Maryland, Delaware, and Washington, D.C. We operate streamgages, observation wells, and monitoring stations that provide the reliable scientific information needed to understand our natural world.

News

Fall 2024 Newsletter - In The Flow

Fall 2024 Newsletter - In The Flow

Spring 2024 Newsletter - In The Flow - Maryland-Delaware-DC Water Science Center

Spring 2024 Newsletter - In The Flow - Maryland-Delaware-DC Water Science Center

Testing New Water Quality Observation Methods In Philadelphia

Testing New Water Quality Observation Methods In Philadelphia

Publications

Seasonally varying contributions of contemporaneous and lagged sources of instream total nitrogen and phosphorus load across the Illinois River basin

Quantifying nutrient sources in streams, their temporal and spatial variability, and drivers of that variability can support effective water resources management. Yet a lack of data and modeling capabilities has previously prevented comprehensive quantification across both space and time. Here a dynamic SPARROW (Spatially Referenced Regressions on Watershed attributes) model that accounts for a la
Authors
Noah Schmadel, Olivia L. Miller, Scott Ator, Matthew P. Miller, Gregory E. Schwarz, Dale M. Robertson, Andrew Sekellick, Kenneth Skinner, David A. Saad

A spatial machine learning model developed from noisy data requires multiscale performance evaluation: Predicting depth to bedrock in the Delaware River Basin, USA

Spatial machine learning models can be developed from observations with substantial unexplainable variability, sometimes called ‘noise’. Traditional point-scale metrics (e.g., R2) alone can be misleading when evaluating these models. We present a multi-scale performance evaluation (MPE) using two additional scales (distributional and geostatistical). We apply the MPE framework to predictions of de
Authors
Phillip J. Goodling, Kenneth Belitz, Paul Stackelberg, Brandon Fleming

Remotely mapping gullying and incision in Maryland Piedmont headwater streams using repeat airborne lidar

Headwater streams can contribute significant amounts of fine sediment to downstream waterways, especially when severely eroded and incised. Potential upstream sediment source identification is crucial for effective management of water quality, aquatic habitat, and sediment loads in a watershed. This study explored topographic openness (TO) derived from 1-m lidar for its ability to predict incision
Authors
Marina Metes, Andrew J. Miller, Matthew E. Baker, Kristina G. Hopkins, Daniel Jones

Science

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New study highlights impact of current and historic land use on stream incision in Maryland Piedmont headwaters

A new method was developed to remotely identify small, eroding streams and measure change over time.
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Monitoring the Effectiveness of Conservation Practices in Small Agricultural Watersheds

Farmers are an important part of the economy and heritage of the Chesapeake Bay. Farmers also act as stewards of the land and water. Across the Chesapeake Bay Watershed, members of the agricultural community are volunteering to adopt conservation practices on their land. The goal of these practices is to protect the health of the soil, local streams and rivers, and the Chesapeake Bay. These...
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Monitoring the Effectiveness of Conservation Practices in Small Agricultural Watersheds

Farmers are an important part of the economy and heritage of the Chesapeake Bay. Farmers also act as stewards of the land and water. Across the Chesapeake Bay Watershed, members of the agricultural community are volunteering to adopt conservation practices on their land. The goal of these practices is to protect the health of the soil, local streams and rivers, and the Chesapeake Bay. These...
Learn More

New study evaluates effects of agricultural conservation practices on nitrogen in streams of the Chesapeake Bay

Issue: Adaptive management in support of Chesapeake Bay restoration is complicated by uncertainty about the effects of agricultural management practices on water quality. Despite increasing investment, effects of agricultural conservation practices on regional water quality remain difficult to quantify due to factors such as groundwater travel times, varying modes-of-action, and the general lack...
link

New study evaluates effects of agricultural conservation practices on nitrogen in streams of the Chesapeake Bay

Issue: Adaptive management in support of Chesapeake Bay restoration is complicated by uncertainty about the effects of agricultural management practices on water quality. Despite increasing investment, effects of agricultural conservation practices on regional water quality remain difficult to quantify due to factors such as groundwater travel times, varying modes-of-action, and the general lack...
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