Maryland-Delaware-D.C. Water Science Center

Data and Tools

Filter Total Items: 203
Date published: January 1, 2018

Attributes for NHDPlus Version 2.1 Reach Catchments and Modified Routed Upstream Watersheds for the Conterminous United States: Mean Infiltration-Excess Overland Flow as a Percent of StreamFlow

This tabular data set represents mean infiltration-excess overland flow as a percent of streamflow, compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to the NHDPlus version 2 data suite b

Date published: January 1, 2018

Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: Crop Land Data Layer 2013

This tabular data set represents the percent of land cover classes from the 2013 Crop land Data Layer compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to the NHDPlus version 2 data suite b

Date published: January 1, 2018

Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: NLCD 2006 Percent Imperviousness

This tabular data set represents NLCD 2006 percent imperviousness compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to the NHDPlus version 2 data suite by the unique identifier COMID. The

Date published: January 1, 2018

Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: Estimated 30 Year, 1971-2000, Mean Annual Watershed Rainfall and Runoff factor ("R factor" of Universal Soil Loss Equation)

This data set represents the mean annual average for the Rainfall and Runoff factor ("R factor" of Universal Soil Loss Equation) for the period 1971-2000 compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This

Date published: January 1, 2018

Attributes for NHDPlus Version 2.1 Reach Catchments and Modified Routed Upstream Watersheds for the Conterminous United States: Estimated Mean Annual Snow as a Percent of Total Precipitation

This tabular data set represents estimated mean annual snow as a percent of total precipitation, 1905-2002 compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to the NHDPlus version 2 data

Date published: January 1, 2018

Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: Percent NLCD 2011 in 50 Meter Riparian Buffer

This tabular data set represents the percent of NLCD 2011 land cover classes in the 50 meter riparian buffer zones compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to the NHDPlus version 2

Date published: January 1, 2018

Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: NLCD 2011 Percent Imperviousness

This tabular data set represents NLCD 2011 percent imperviousness compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to the NHDPlus version 2 data suite by the unique identifier COMID. The

Date published: January 1, 2018

Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: 30 Year (1971 - 2000) Mean Annual Temperature (Celsius)

This tabular data set represents 30 year (1971 - 2000) mean annual temperature (Celsius) compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to the NHDPlus version 2 data suite by the

Date published: January 1, 2018

Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: National Land Cover Database 2011 (NLCD 2011)

This tabular data set represents the percent of land cover classes from the 2011 National Land Cover Dataset compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to the NHDPlus version 2 data

Date published: January 1, 2018

Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: NAWQA Wall-to-Wall Anthropogenic Land Use Trends (NWALT) Timber 1999-2012

This tabular data set contains annual information on forestry activity, compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to the NHDPlus version 2 data suite by the unique identifier COMI

Date published: January 1, 2018

Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: 30 Year Average (1961-1990) of Minimum Monthly Number of Days of Measurable Precipitation

This tabular data set represents 30 year average (1961-1990) of minimum monthly number of days of measurable precipitation per month compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to

Date published: January 1, 2018

Attributes for NHDPlus Version 2.1 Flowlines for the Conterminous United States: 2012 Source Sector Deposition from Community Multiscale Air Quality modeling system (CMAQ)

This metadata record describes 4 tabular data sets that estimate fraction of the total dry or wet deposition due to emissions from fertilizer and animal manure based on output from the Community Multiscale Air Quality modeling system (CMAQ, Zhang and others, 2019) compiled for two spatial components of the NHDPlus version 2.1 data suite (hereto referred as NHDPlusv2) for the contermin