Access hundreds of Bay Program publications, from scientific reports to factsheets to memorandums.
2022 Chesapeake Bay Oyster Restoration UpdatePublished in Report
This document includes details on large-scale oyster restoration, including acres of reef constructed and number of spat-on-shell planted, in Maryland and Virginia tributaries for calendar year 2022.View details
2022 Blue Crab Science Workshop ReportPublished in Report
This report summarizes discussions held at the Blue Crab Science Workshop in September 2022. Workshop discussions were focused on blue crab population drivers and stock assessment modeling to better understand the recent population declines and to prepare for the upcoming benchmark stock assessment.View details
2021 Outcome Attainability DocumentsPublished on December 13, 2021 in Report
Over the past year, the Chesapeake Bay Program assessed each outcome in its ability to attain its target. This assessment found that 11 outcomes are fully on track to meet their targets by 2025. On the other hand, several challenges were identified in meeting some outcomes (e.g., forest buffers, wetlands, 2025 Watershed Implementation Plans, tree canopy). These issues are now being discussed to determine the appropriate solutions that will accelerate progress. These documents include the original outcome language, current status, background information in how the outcome came to be included in the Chesapeake Bay Watershed Agreement, the baseline (if available) and data source. Information is updated as of November 18, 2021.View details
Understanding Chesapeake Bay Modeling ToolsPublished in Report
The Chesapeake Bay Program uses state-of-the art science and monitoring data to replicate conditions of the Chesapeake Bay watershed. This information is then used by decision-makers at the federal, state and local levels to determine how best to restore and protect local waterways, and ultimately, the Chesapeake Bay. By combining advanced modeling tools and real-world monitoring data, we gain a comprehensive view of the Chesapeake ecosystem—from the depths of the Bay to the upper reaches of the watershed.View details
Cropland Irrigation BMP Expert Panel ReportPublished on December 12, 2019 in Report
WQGIT approved final report from the Cropland Irrigation Expert Panel.View details
Bay Barometer: Health and Restoration in the Chesapeake Bay Watershed (2018-2019)Published in Report
The data in Bay Barometer reflect the Chesapeake Bay’s health over the course of many years and, in some cases, decades. The publication offers a snapshot of the best available information from 2018 and 2019 on ecological health and our efforts to protect and restore the nation’s largest estuary, as well as our progress toward achieving the goals and outcomes of the Chesapeake Bay Watershed Agreement.View details
Wetland Rehabilitation, Enhancement and Creation BMP expert panel reportPublished on March 18, 2020 in Report
The Wetland Workgroup approved the formation of this expert panel to evaluate the effectiveness of nontidal wetland best management practices (BMPs) to reduce loads of nitrogen, phosphorus and sediment to the Chesapeake Bay. This panel was formed to expand on the CBP-approved report by a previous Wetland Expert Panel that clarified the wetland restoration BMP and established two nontidal wetland land uses in the Phase 6 Chesapeake Bay Watershed Model (WEP, 2016).
The current panel first convened in November 2017 and deliberated its approach and recommendations over the subsequent months. This report describes the panel’s recommendations for review, feedback and approval under the Chesapeake Bay Program’s Protocol for the Development, Review, and Approval of Loading and Effectiveness Estimates for Nutrient and Sediment Controls in the Chesapeake Bay Watershed Model, or “BMP Review Protocol.”
The expert panel worked diligently to articulate BMP efficiencies for wetland creation, rehabilitation and enhancement with respect to the available literature and the CBP-approved wetland restoration BMP. As with wetland restoration, the recommended wetland creation BMP is simulated as a land use change that also reduces upland loads using the above efficiency value. The recommended wetland rehabilitation BMP is not a land use change, but the efficiency is applied to upland land uses. Further details for how the BMPs will be reported for progress runs and simulated in the Watershed Model are provided in Appendix B. As explained in section 5, the panel recommends that wetland enhancement should not be a BMP for purposes of achieving nutrient and sediment reduction targets under the TMDL, as simulated in the Watershed Model.
Bay Barometer: Health and Restoration in the Chesapeake Bay Watershed (2017-2018)Published on April 2, 2019 in Report, Agreement and Outcome
The data in Bay Barometer reflect the Chesapeake Bay’s health over the course of many years and, in some cases, decades. The publication offers a snapshot of the best available information from 2017 and 2018 on ecological health and our efforts to protect and restore the nation’s largest estuary, as well as our progress toward achieving the goals and outcomes of the Chesapeake Bay Watershed Agreement.View details
CBSAC 2018 Blue Crab Advisory ReportPublished in Report
Annual report published by the Chesapeake Bay Stock Assessment Committee on the status of the blue crab population in the Chesapeake Bay and management advice for Bay jurisdictions.View details
Holistically Analyzing the Benefits of Green InfrastructurePublished on October 31, 2017 in Report
Changes in the regulatory landscape, coupled with budget-constrained environments, are driving local governments to search for new or evolving strategies and investments that deliver more value than conventional stormwater management practices.
In light of this challenge, green infrastructure (GI) is getting more attention as a stormwater management strategy. GI is described as a more holistic and multifunctional approach to stormwater management that can deliver benefits across the triple bottom line, mitigate water quality impacts, improve quality of life and enhance climate resiliency (US EPA, 2015).
The list of direct and indirect benefits arising from GI is fairly consistent across sources, but the scale and value of these benefits are not. Careful examination of peer-reviewed published literature, combined with existing guidance documents and studies, provide options for quantifying and monetizing the wide array of GI benefits. The various sources are diverse. They employ different valuation and assessment methodologies. Existing resources do not provide a unifying framework or standardization. Consequently, the methods require multi-disciplinary technical knowledge (engineering, economic and bio-physical) that stormwater managers do not generally have.
This document is intended for smaller local governments with stormwater programs that are responsible for regulatory compliance with municipal separate storm sewer system (MS4) obligations (e.g., Phase 2 communities). It outlines an approach to holistically evaluate the benefits of implementing green infrastructure. The guidance places emphasis on first understanding the goal and scope for assessing benefits. It uses the goal and scope to step the user through: (1) differentiating between direct benefits and co-benefits of GI, and (2) understanding when and how these benefits need to be characterized, quantified or monetized. This document is not intended to be a “how to” measure benefits for conducting benefit-cost analysis, but rather anapproach to tailor benefits and co-benefits identification and description to inform decision making and stakeholder engagement.
The report is organized into three sections with attachments.
- The first section introduces the concept of green infrastructure and describes some of the most common GI practices.
- The second section discusses the range of benefits and co-benefits often attributed to GI.
- The third section outlines an approach to assessing the benefits.
- Finally, the attachments provide case studies that illustrate how this guidance can be used.