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Vegetation_LTDS Vegetation_LTDS
Line-transect distance sampling (LTDS) surveys are commonly used to estimate abundance of animals or objects. In terrestrial LTDS surveys of gopher tortoise (Gopherus polyphemus) burrows, the presence of ground-level vegetation significantly decreases detection of burrows of all sizes, but no field or analytical methods exist to control for spatially heterogeneous vegetation obstruction...
Updated CONUS river network attributes based on the E2NHDPlusV2 and NWMv2.1 networks Updated CONUS river network attributes based on the E2NHDPlusV2 and NWMv2.1 networks
The comid field of these data can be used to join to the NHDPlus version 2 flowline comid or catchment featureid attributes. The included attributes follow the same data model as the NHDPlusV2 but include numerous updates and improvements to network connectivity. All attributes that depend on network connectivity have been recalculated. These attributes are based on the National...
Great Basin predicted potential cheatgrass abundance, with model estimation and validation data from 2011-2019 Great Basin predicted potential cheatgrass abundance, with model estimation and validation data from 2011-2019
This data release includes data and metadata describing 1) the rule set used to create vegetation type categories for the Great Basin; 2) estimation and validation data used to fit models of cheatgrass (Bromus tectorum) cover; and 3) mapped predictions of potential cheatgrass abundance.
Hawaii Volcanoes National Park, Puhimau Geothermal Area vegetation and abiotic data, 2011-2021 Hawaii Volcanoes National Park, Puhimau Geothermal Area vegetation and abiotic data, 2011-2021
This data release includes metadata and tabular data that documents survival of endangered Portulaca sclerocarpa, percent cover of vegetation surrounding Portulaca sclerocarpa, as well as soil depth and soil temperature. All data were taken between 2011-2021 in the Puhimau Geothermal Area in Hawaiʻi Volcanoes National Park.
Spatial data set of mapped water-level changes in the High Plains aquifer, predevelopment (about 1950) to 2017 and 2015 to 2017 Spatial data set of mapped water-level changes in the High Plains aquifer, predevelopment (about 1950) to 2017 and 2015 to 2017
The High Plains aquifer underlies 111.8 million acres (about 175,000 square miles) in parts of eight States—Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. Water-level declines began in parts of the High Plains aquifer soon after the beginning of substantial irrigation with groundwater in the aquifer area (about 1950). This data release contains the...
Thickness of the Chicot aquifer system of southwestern Louisiana's surficial confining unit and shallow sand lenses Thickness of the Chicot aquifer system of southwestern Louisiana's surficial confining unit and shallow sand lenses
The Chicot aquifer system is a vital water resource for Southwestern Louisiana, providing nearly half of the fresh groundwater the region consumes (Sargent, 2011). The aquifer’s surficial confining unit consists of a wedge-shaped thickening sequence of south to southeastern dipping, interbedded clays and coarser material (primarily sand and gravel). In collaboration with the Louisiana...