Science Inventory

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StreamCat is a centralized dataset of watershed characteristics built to assist researchers and managers in sustainability of our Nation&rsquo;s waters.&nbsp; StreamCat is a published dataset characterizing the watershed features of ~2.65 million stream segments within the conter...

spsurvey is an R package for design-based statistical inference, with a focus on spatial data. spsurvey provides the generalized random-tessellation stratified (GRTS) algorithm to select spatially balanced samples via the grts() function. The grts() function flexibly accommodates...

Peer review of nutrient assessment approach used in NRSA and other NARS.

StreamCat is a centralized dataset of watershed characteristics built to assist researchers and managers in sustainability of our Nation&rsquo;s waters.&nbsp; StreamCat is a published dataset characterizing the watershed features of ~2.65 million stream segments within the conter...

Natural Capital Accounting is the systematic tracking of ecosystem asset&rsquo;s extent, condition, capacity, and production and use of beneficial services through time. In most cases the goal is to generate national scale accounts on an annual basis so that people can be aware o...

In-stream wood plays important chemical, physical and ecological functions in aquatic systems, benefiting the biota directly and indirectly. However, human activities along river corridors have disrupted wood recruitment and retention leading to reduced in-stream wood amounts. In...

Many organizations now use probability-based surveys for measuring the condition of aquatic resources. These include some states and tribes, as well as EPA&rsquo;s National Aquatic Resource Surveys. The R package &lsquo;spsurvey&rsquo; has long been used to analyze the data produ...

Sediment diatoms are widely used to track environmental histories of lakes and their watersheds, but merging datasets generated by different researchers for further large-scale studies is challenging because of the taxonomic discrepancies caused by rapidly evolving diatom nomencl...

One of the goals of coastal ecological research is to describe, quantify and predict human effects on coastal ecosystems. Broad cross-systems assessments to classify ecosystem status or condition have been developed, but are not updated frequently, likely because a lot of informa...

Rigorous assessments of the ecological condition of water resources and the effect of human activities on those waters require quantitative physical, chemical and biological data. The U.S. Environmental Protection Agency&rsquo;s river and stream surveys quantify river and stream ...

Rigorous assessments of the ecological condition of water resources and the effect of human activities on those waters require quantitative physical, chemical, and biological data.&nbsp; The U.S. Environmental Protection Agency&rsquo;s river and stream surveys quantify river and ...

Lake hydrology is integral to lake ecological condition, but human-related water needs and changing climate conditions may alter hydrology beyond natural ranges. Separating natural and human effects can support lake management and assessment and requires a clear conceptual unders...

The National Lakes Assessment 2017: A Collaborative Survey of Lakes in the United States presents the results of a second evaluation of the lakes in the United States. This report is part of the National Aquatic Resource Surveys, a series of statistically based surveys designed t...

Wetland soils contain some of the densest stores of carbon in the biosphere.&nbsp; However, there is little understanding of the quantity and distribution of carbon stored across US wetlands, or how these stocks change over time. Soil carbon was measured using the same protocol t...

This presentation provides and overview of our Index of Chemical Integrity in use in Rivers and Streams for the EPA/State program NARS.&nbsp; The index aggregates a variety of chemical measures into an overall index to reflect aquatic chemical integrity.

The influence of watershed land use on instream physical, chemical, and biological conditions is well documented. Improved availability of watershed data has allowed for modeling and spatial interpolation of several such features across the conterminous US. While these models pro...

Aquatic resource management faces the challenge of developing ecologically relevant practices while managing diverse water bodies distributed across the landscape. Large-scale monitoring programs provide a wealth of information to assess aquatic ecosystem condition at broad spati...

Many organizations now use probability-based surveys for measuring the condition of aquatic resources. These include some states and tribes, as well as EPA&rsquo;s National Aquatic Resource Surveys. The R package &lsquo;spsurvey&rsquo; has long been used to analyze the data produ...

This presentation provides an overview of the National Aquatic Resource Surveys and their relationship to the Clean Water Act.

The National Aquatic Resource Surveys (NARS) are a critical source of data regarding the health of aquatic ecosystems in the U.S. Interpreting these data require that scientists be able to estimate how each ecosystem would function in the absence of anthropogenic stressors. For m...

This presentation provides an update to the status of an existing tool for the National Aquatic Resource Surveys (NARS). This R Shiny application allows crews that have saved copies of the JSON data files submitted to NARS IM from a mobile iPad app to extract the data from these ...

Nitrogen (N) removal along flowpaths to aquatic ecosystems is an important regulating ecosystem service that can help reduce N pollution in the nation's waterways, but can be challenging to measure at large spatial scales. Measurements that integrate N processing within watershed...

In partnership with states and tribes, EPA assess the condition of the nation&rsquo;s waters through EPA&rsquo;s National Aquatic Resource Surveys (NARS).&nbsp; EPA is interested in using new technologies to gain more information to aid the goals of NARS, and one of those technol...

Restoring degraded rivers requires initial assessment of the fluvial landscape to identify stressors and riverine features that can be enhanced. We associated local-scale river habitat data collected using standardized national monitoring tools with modeled regional water tempera...

The impact of watershed and riparian anthropogenic activities on lake and stream water quality is well established, but has been much less studied in wetlands.&nbsp; Here, we use data from the 2016 National Wetland Condition Assessment &ndash; collected via a U.S. EPA partnership...