Filters: Tags: Sediment Accumulation (X)
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Sediment accumulation in playa wetlands, such as those in the Rainwater Basin in south-central Nebraska, reduces the hydrologic functionality and alters the vegetative composition of the wetlands reducing their ability to provide forage and resting habitat for migratory birds. Most Rainwater Basin wetlands have intense agricultural production occuring within their watersheds that accelerate sediment accumulation within the wetland. This sediment accumulation reduced the abilty of the wetland to hold water which, in turn, allows invasive and upland plants to proliferate with the wetland footprint. Planting upland grassland buffers around wetlands reduces the sediment load entering the wetland reducing the need...
ESRI file geodatabase containing LiDAR derived watershed boundaries for Rainwater Basin Wetalnds.
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Data,
Federal resource managers,
GPLCC,
GPLCC,
Great Plains,
Summary of project, results, and discussion for the study completed by Mark W. Bowen and William C. Johnson. Summary written by the Great Plains Landscape Conservation Cooperative (GP LCC).
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Colorado,
Colorado,
Federal resource managers,
GPLCC,
GPLCC,
With extraordinary resolution and accuracy, Light Detection and Ranging (LiDAR)-derived digital elevation models (DEMs) have been increasingly used for watershed analyses and modeling by hydrologists, planners and engineers. Such high-accuracy DEMs have demonstrated their effectiveness in delineating watershed and drainage patterns at fine scales in low-relief terrains. However, these high-resolution datasets are usually only available as topographic DEMs rather than hydrologic DEMs, presenting greater land roughness that can affect natural flow accumulation. Specifically, locations of drainage structures such as road culverts and bridges were simulated as barriers to the passage of drainage. This paper proposed...
Categories: Data,
Publication;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Federal resource managers,
GPLCC,
GPLCC,
Great Plains,
Great Plains,
Maps depicting the LiDAR derived watersheds, flowlines, and drainages with comparison to previously known watershed extents.
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Federal resource managers,
GPLCC,
GPLCC,
Great Plains,
Great Plains Landscape Conservation Cooperative,
Holocene environmental change is poorly characterized throughout much of the High Plains. Playa wetlands are sites with appreciable potential for reconstructing environmental change because of their environmental sensitivity. Radiocarbon, litho- and magneto-stratigraphic, and stable carbon isotope (δ13C) data for four playas on the Kansas High Plains indicate significant change occurred throughout the Holocene, which had profound impacts on playa ecosystem functions (e.g. groundwater recharge, surface water storage, and habitat). Minimum δ13C values and buried soils observed during the Pleistocene–Holocene transition suggest sufficient moisture to support vegetative cover and promote pedogenesis. Low magnetic susceptibility,...
Categories: Data,
Publication;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Colorado,
Colorado,
Federal resource managers,
GPLCC,
GPLCC,
The Rainwater Basin in south-central Nebraska includes a complex of seasonally shallow playa wetlands that attract millions of migratory waterfowl as well as other waterbirds, including the federally and state listed endangered whooping crane. The Light Detection And Ranging (LiDAR) data provide the robust capability of capturing small variations in low-relief playa wetlands. The main objective of this project is to build LiDAR-derived 3-D geospatial models to statistically assess the effectiveness of grass plantings and buffers on playa natural inundation and sedimentation control at watershed scales in the Rainwater Basin. The anticipated products include: (1) A set of statistical models to correlate grass plantings/buffers...
Categories: Data,
Project;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 2013,
Conservation NGOs,
Datasets/Database,
FY 2013,
FY2013,
Playa wetlands are critical resources of the Great Plains, providing a range of ecological functions such as groundwater recharge, surface water storage, wetland habitat, and sediment filtering. As land cover has been converted from native grassland to cropland, playa ecological functions appear to have been dramatically impacted due to increased sediment delivery. This project will incorporate historical data to establish long-term trends in climate (primarily precipitation), watershed and playa land cover, buffer conditions, and playa sedimentation patterns. Previous studies have relied on relatively low-resolution spatial data and have focused primarily on contemporary land cover to establish spatial patterns...
Categories: Data,
Project;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 2013,
CO-01,
CO-02,
CO-03,
CO-04,
Maps depicting the LiDAR derived watersheds, flowlines, and drainages with comparison to previously known watershed extents.
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Federal resource managers,
GPLCC,
GPLCC,
Great Plains,
Great Plains Landscape Conservation Cooperative,
Maps depicting the soil erosion potential modeled for Rainwater Basin Wetland Watersheds using the Revised Universal Soil Loss Equation 2.
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Federal resource managers,
GPLCC,
GPLCC,
Great Plains,
Great Plains Landscape Conservation Cooperative,
Inundation is a critical parameter of wetland hydrologic performance. This study uses Annual Habitat Survey data from 2004 to 2012 in the Rainwater Basin in south-central Nebraska to examine differences between the actual inundation conditions and three datasets: the National Wetland Inventory (NWI), the Soil Survey Geographic database (SSURGO), and LiDAR-derived depressions. The results show that current wetland inundated areas were well overlaid with these datasets (99.9% in SSURGO data, 67.9% in NWI data, and 87.3;% in LiDAR-derived depressions). However, the hydrologic degradation of playa wetlands was not reflected in these datasets. In SSURGO data, only 13.3% of hydric soil footprint areas were inundated and...
Categories: Data,
Publication;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Federal resource managers,
GPLCC,
GPLCC,
Great Plains,
Great Plains Landscape Conservation Cooperative,
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