Skip to main content
Advanced Search

Filters: Tags: mississippi river basin (X)

165 results (25ms)   

Filters
Date Range
Extensions
Types
Contacts
Categories
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
This data release includes estimates of annual and monthly mean concentrations and fluxes for nitrate plus nitrite, orthophosphate and suspended sediment for nine sites in the Mississippi River Basin (MRB) produced using the Weighted Regressions on Time, Discharge, and Season (WRTDS) model (Hirsch and De Cicco, 2015). It also includes a model archive (R scripts and readMe file) used to retrieve and format the model input data and run the model. Input data, including discrete concentrations and daily mean streamflow, were retrieved from the National Water Quality Network (https://doi.org/10.5066/P9AEWTB9). Annual and monthly estimates range from water year 1975 through water year 2019 (i.e. October 1, 1974 through...
Nitrogen from the Mississippi River Basin is believed to be at least partly responsible for the large zone of oxygen-depleted water that develops in the Gulf of Mexico each summer. Historical data show that concentrations of nitrate in the Mississippi River and some of its tributaries have increased by factors of 2 to more than 5 since the early 1900s. We have used the historical streamflow and concentration data in regression models to estimate the annual flux of nitrogen (N) to the Gulf of Mexico and to determine where the nitrogen originates within the Mississippi Basin. Results show that for 1980–1996 the mean annual total N flux to the Gulf of Mexico was 1 568 000 t/year. The flux was approximately 61% nitrate...
thumbnail
Hardware to collect infrared digital imagery during periods of peak vegetative growth to develop a cover map for the Mississippi River floodplain from Minneapolis, Minn. to the Ohio River confluence. This information is being used to identify changes within the basin over the past 10 years, strategically guide biological programs in support of natural resource conservation, and assist decision makers from federal, state, and non-governmental organizations in making science-based decisions within the Mississippi River basin. Images are currently being processed by U.S. Geological Survey. This information will be used to identify changes within the basin over the past 10 years (time since the last systemic imagery...
thumbnail
Improved Gulf Hypoxia Planning Tool: Landscape scale planning tools focus conservation priorities through a series of region-specific lenses. These tools include: CHAT; SECAS; Gulf Hypoxia Initiative - Precision Conservation Blueprint v1.5; and landscape designs developed by the Great Plains LCC and Gulf Coast Prairie LCC. Discussions with industry, agency and organizational leaders across the mid-continent suggest that the time is ripe for opening a dialogue about how to bridge the planning between the west and east to find the appropriate stakeholder-driven set of mid-continent connections for a network of lands and waters. The recipient will assist staff from multiple LCCs and other interested entities in setting...
thumbnail
Estimated number of breeding pairs of Dickcissel based on the amount of grass, trees, and/or hay in the landscape. Landscape scale varied from 1/4- to 2-mile radius depending on the species. Pair estimates were calculated for grass patches >=1 ha, extrapolated to 40-ac cells, then smoothed by averaging over a 1-mile radius. Models were based on point count surveys conducted in 2003-2005 throughout the Tallgrass Prairie Pothole Region. Point count locations were stratified by cover type, the amount of grass in the landscape, and USFWS Wetland Management District boundaries. Landcover data were derived from 2000 Thematic Mapper imagery. Grid values = number of breeding pairs per 30-m pixel.
thumbnail
The Virginia Natural Landscape Assessment (VaNLA) was a landscape-scale GIS analysis that identified, prioritized, and linked important lands to form natural land networks throughout Virginia. Using land cover data derived from satellite imagery, the VaNLA identified large, unfragmented cores, patches of natural land with at least 100 acres of interior cover. Cores provide habitat for a wide range of species, from interior-dependent forest species to habitat generalists, as well as for species that utilize marsh and maritime habitats. The most ecologically significant cores were linked by landscape corridors. Lower-ranked cores and fragments of natural land that intersected landscape corridors were added as corridor...
thumbnail
Estimated number of breeding pairs of Savannah sparrow based on the amount of grass, trees, and/or hay in the landscape. Landscape scale varied from 1/4- to 2-mile radius depending on the species. Pair estimates were calculated for grass patches >=1 ha, extrapolated to 40-ac cells, then smoothed by averaging over a 1-mile radius. Models were based on point count surveys conducted in 2003-2005 throughout the Tallgrass Prairie Pothole Region. Point count locations were stratified by cover type, the amount of grass in the landscape, and USFWS Wetland Management District boundaries. Landcover data were derived from 2000 Thematic Mapper imagery. Grid values = number of breeding pairs per 30-m pixel.
thumbnail
Reaches on the USEPA 303d list of impaired waterways where causes and sources are from agriculture nutrients within the Mississippi River Basin. Source: http://www.epa.gov/waters/data/rad_303d_20140804_fgdb.zip. Downloaded May 2015.
thumbnail
The purpose of this map is to provide a georeferenced characterization of vegetation in the early stages of Euro-American settlement. One of the research uses for the surveys nationally is for presettlement vegetation. This data can be used to analyze presettlement vegetation patterns for the purpose of determining natural community potential, productivity indexes, and patterns of natural disturbance. The area of the original plat maps were townships; use of the data at a larger scale would not be appropriate.In Illinois, the surveys began in 1804 and were largely completed by 1843. The surveyors moved across the state laying out a rectangular grid system, known as the Public Land Survey System (PLS or PLSS). They...
thumbnail
Areas identified in the Minnesota Pheasant Action Plan to target habitat enhancement and protection in complexes at least 9 square miles in size where a goal of 40 percent permanent protection can be met within the timeframe of the plan. The complexes identify the best places for pheasant production and focused protection efforts on those areas to create permanent habitat complexes. Ranking of the complexes was based on current conditions. For instance, if a complex is at 38% permanent protection, it scores very high since with only a little effort 40% protection can be achieved, conversely. A place that was 20% scored low. The complexes identify the best places for pheasant production and focused protection efforts...
thumbnail
This dataset is made up of features aggregated from Ecoregional Assessments as well as other planning methodologies used across The Nature Conservancy to identify areas of biodiversity significance and prioritize conservation action. More information about ecoregional assesments and other conservation planning methodologies is available at The Nature Conservancy's Conservation Gateway, the Ecoregional Assessment Status Tool (EAST), and at http://maps.tnc.org. This dataset provides a vision for conservation success for ecological systems, natural communities and species representative of an ecoregion by showing the boundaries of areas that The Nature Conservancy has prioritized for conservation within the Mississippi...
thumbnail
Conservation priorities have been identified for each river basin at the cataloging unit or stream reach scale and were categorized using two tiers to indicate relative importance when considering the limited resources available for conservation initiatives. The recommendations were developed by Commission biologists through review of their field data as well as data from several agencies and research organizations. The review considered a combination of factors such as the presence of federal- or state-listed species; distribution of priority species; high species diversity; unique habitats, or high-quality habitats in the subbasin; and the importance of the watershed to downstream populations. Priority areas identified...
thumbnail
Mississippi River Basin Gridded SSURGO mapunits where "pwsl1pomu" (wetland potential) is at least 60 or at least 50 and "drclassdcd" (Drainage Class - Dominant Condition) is poorly or very poorly drained. These mapunits represent those with the highest wetland potential based on these criteria.
thumbnail
Potential yields and harvested area, by county, within the Mississippi River Basin, of switchgrass planted for biofuel in the year 2030 from the USDOE Billion Ton Update baseline scenario at a farmgate price of $60/dry ton or less. Source: USDOE Billion Ton Update, Scenario: BLY+EC1_BLT (Baseline Yield with 1% Increase in Energy Crops); Year: 2030.
thumbnail
These datasets represent model results from Rabotyagov et. al. 2014. Cost-effective targeting of conservation investments to reduce the northern Gulf of Mexico hypoxic zone. Proceedings of the National Academy of Sciences. 111 (52): 18530-18535. The authors developed an integrated assessment model linking the water quality effects of cropland conservation investment decisions on the more than 550 agricultural subwatersheds that deliver nutrients into the Gulf of Mexico with a hypoxic zone model. The model was used to identify the most cost-effective subwatersheds to target for cropland conservation investments. The 60% reduction [60PCT] model could cost-effectively reduce the area of the hypoxic zone to 5,000 km2,...
map background search result map search result map Mississippi River Remote Sensing Acquisition HU-8 Percent Cropland (CDL 2013) Reaches Impaired by Agricultural Nutrient Sources (2010) UMRGL JV Grassland Bird Habitat Data UMRGLR JV - Woodland Breeding Bird Habitat Priorities Illinois - Presettlement Vegetation Gridded SSURGO - Highest Potential for Wet Soil HAPET Breeding Pairs - Dickcissel HAPET Breeding Pairs - Savannah sparrow Gulf Hypoxia Solution Maps Gulf Hypoxia Project Area with Participating LCC's Biofuel Switchgrass Potential - 2030 (MRB) American Bird Conservancy - ESA Critical Bird Habitat (MRB) Minnesota Pheasant Action Plan - Habitat Complexes North Carolina SWAP Priority Watersheds (MRB HUC-12) Nature Conservancy - Ecoregional Rollup (MRB) Virginia Natural Land Network Des Moines River Basin (HU4-0710) - Riparian Implementation Opportunities (2017) Data to Incorporate Water Quality Analysis into Navigation Assessments as Demonstrated in the Mississippi River Basin North Carolina SWAP Priority Watersheds (MRB HUC-12) Minnesota Pheasant Action Plan - Habitat Complexes Illinois - Presettlement Vegetation Mississippi River Remote Sensing Acquisition Virginia Natural Land Network HAPET Breeding Pairs - Dickcissel HAPET Breeding Pairs - Savannah sparrow Data to Incorporate Water Quality Analysis into Navigation Assessments as Demonstrated in the Mississippi River Basin UMRGLR JV - Woodland Breeding Bird Habitat Priorities UMRGL JV Grassland Bird Habitat Data American Bird Conservancy - ESA Critical Bird Habitat (MRB) Gulf Hypoxia Project Area with Participating LCC's Reaches Impaired by Agricultural Nutrient Sources (2010) Gulf Hypoxia Solution Maps HU-8 Percent Cropland (CDL 2013) Gridded SSURGO - Highest Potential for Wet Soil Des Moines River Basin (HU4-0710) - Riparian Implementation Opportunities (2017) Biofuel Switchgrass Potential - 2030 (MRB) Nature Conservancy - Ecoregional Rollup (MRB)