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You are browsing all 24 communication products for Choptank River, Chesapeake Bay

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Nitrogen source tracing in the Choptank River Watershed (Report) Permanent Link

Prepared for: Midshore Riverkeeper Conservancy

This project analyzed existing aquatic sediments, plants, and animals collected throughout the watershed to pinpoint key sources of nitrogen. As submerged aquatic vegetation has disappeared in regions heavily impacted by land-use activities, macroalgae and oysters were deployed and incubated in situ to help trace the origin of nitrogen inputs by identifying, delineating and mapping the relative influence of the varied urban and agricultural land uses in the watershed.



Greenhouse Gas Reduction Plan: Chapter 8 Adaptation (Report) Permanent Link

Climate change will affect Maryland in a variety of ways. More obvious impacts could include an increased risk for extreme events such as drought, storms, flooding, and forest fires; more heat-related stress; the spread of existing or new vector-born disease; and increased erosion and inundation of low-lying areas along the State’s shoreline and coast. Adaptation, together with mitigation, is necessary to address climate change. Climate change adaptation is an extremely complex process and there is no single means of response. This report details the many adaptation strategies taken by the State of Maryland.



Resiliency and water resources management: Water supply in a changing climate (Newsletter) Permanent Link

Publisher: Maryland Department of Natural Resources and the Integration and Application Network

Maryland citizens are blessed with an abundant supply of water. However, many water systems are already stressed during droughts, and infrastructure damage and water contamination occurs during floods. Future population growth will combine with increasingly variable weather patterns to place more communities at risk of property damage, regulatory liabilities and uncertain access to drinking water. Maryland’s Eastern Shore is particularly susceptible to salt water intrusion as water demand increases and sea levels rise. Aquifers in central and western Maryland are being stressed due to population growth; short-term storage capacities and contamination from road salt are two issues of significant concern. A changing climate will mean we all have to plan for more uncertainty. Marylanders should consider the impacts of rising temperatures, more rain in the fall and winter and less in the summer, and more extreme events, on their livelihoods. Some of the changes will be positive, such as more growing days, while others negative, such as more flooding and associated impacts on infrastructure, buildings, and public health.



Best Management Practices: Preserving clean water in a changing climate (Newsletter) Permanent Link

Publisher: Maryland Department of Natural Resources and the Integration and Application Network

Risk management is critical in any restoration project. Risks include those associated with climate patterns, such as more intense storms, as well as those associated with land use change, site selection, and design. Addressing these risks in conjunction with ongoing restoration efforts will prepare communities for greater variability and may result in cost savings and reduced risk. Best Management Practices (BMPs) should be sited and designed with climate change impacts in mind. Incorporating climate change considerations into your project design will not require a wholesale change in implementation in most cases. Evaluating your project for its climate vulnerabilities and developing a range of strategies at the initial planning stage will increase effectiveness, decrease maintenance costs, and help to ensure you are meeting the U.S. Environmental Protection Agency’s Total Maximum Daily Load requirements into the future.



Watershed Management: Conservation in a changing climate (Newsletter) Permanent Link

Publisher: Maryland Department of Natural Resources and the Integration and Application Network

Maryland’s extensive aquatic ecosystems range from freshwater swamps and bogs to freshwater rivers and marshes to coastal bays and salt marshes. These ecosystems are influenced by precipitation, temperature, tropical storms, and human activity. Human development and pollution have degraded their natural resilience, leaving them more vulnerable to climate change and extreme events. One hundred years of data show that Maryland is getting warmer on average by 1.8°F but by as much as 3.6°F in the winter. Warmer air holds more moisture, so we should expect changes in our rainfall. Over the last century, Maryland has become wetter in March and autumn and drier in July and August. For aquatic ecosystems this may alter salinity in the Bay and impact streamflow and stream temperature, all of which could shift where species live and affect watershed restoration projects. A changing climate will mean we all have to plan for more uncertainty.



2012 Chesapeake Bay Report Card (Report card) Permanent Link

This report card provides a transparent, timely, and geographically detailed assessment of Chesapeake Bay. In 2012, the methods for the report card have changed to include five water quality indicators and two biotic indicators. In 2012, the overall grade for Chesapeake Bay is a 47%, a C. This means the Bay is in moderate health. Fisheries indicators as well as trajectories of reporting region health are also presented. For further details, visit the Report Card website.



2013 summer forecast (Report) Permanent Link

Produced by EcoCheck in collaboration Younjoo Lee and Walter Boynton, University of Maryland Center for Environmental Science

Researchers at the University of Maryland Center for Environmental Science have forecasted the hypoxic volume of the mainstem Chesapeake Bay for the seventh year. The average summer 2013 hypoxic (Dissolved Oxygen ≤2.0 mg·L-1) volume forecast is 4.5 km3, with 95% confidence interval that the hypoxic volume will be between 4.1 and 4.8 km3. This is smaller than average for the time period (1985-2012). Loads are the main driver of the forecast model.



Chesapeake Bay: Storm Impacts, Conowingo Dam and Choptank River (Presentation) Permanent Link

Presented at the Nanticoke Watershed Alliance 17 April 2013 Cambridge, MD

The Conowingo Dam reservoir has been losing capacity for sediment trapping since it was constructed in 1928; sediments and phosphorus now largely bypass the dam during high flow events. Scouring will occur more frequently during high flow events. Nitrogen reductions in Chesapeake tributaries have led to SAV resurgences. Susquehanna flats SAV are resilient to storm flows. Conditions of Chesapeake Bay tributaries, like the Choptank River, are affected by their subwatersheds.



2012 Report Card - Eastern Bay, Choptank, Miles, and Wye Rivers (Report card) Permanent Link

Publisher: Midshore Riverkeeper Conservancy

This report card is an assessment of the aquatic health of the Eastern Bay, Choptank, Miles, and Wye Rivers, and is based on data collected by the Midshore Riverkeeper scientists and Midshore Creekwatchers. It is the third annual report card which discusses the status of river health in the midshore during 2012 based on five different indicators.



2012 July hypoxia forecast (Report) Permanent Link

Produced by EcoCheck in collaboration with University of Michigan and USGS

Researchers at the University of Michigan have forecasted the July hypoxic volume of the mainstem Chesapeake Bay for the sixth year. The July 2012 hypoxic volume is forecasted to be 6.4 km3, which is considered slightly below average. Unusual patterns in streamflow meant there were lower than normal total nitrogen loads from the Susquehanna River in the spring. Loads are the main driver of the forecast model.



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