Filters: Tags: Subsidence (X)
145 results (128ms)
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Categories: Publication;
Types: Citation;
Tags: ASW, USA, Louisiana,
Accretion,
Biodegradation,
Coastal Marshes,
Decomposition,
Categories: Publication;
Types: Citation;
Tags: SW 0810 General,
USA, Nevada,
Water Resources Abstracts,
computer models,
hydrologic models,
This project resulted in an extensive mapping of coastal change along the entire coastline of the Western Alaska Landscape Conservation Cooperative (LCC). The work provides important baseline information on the distribution and magnitude of landscape changes over the past 41 years. The extent of change to the coastline and to coastal features, such as spits, barrier islands, estuaries, tidal guts and lagoons, was known to be substantial in some areas along the coast (e.g., portions of the Yukon–Kuskokwim Delta), although the extent of change along the full Bering Sea coast was not well documented. With this analysis, changes can be summarized for different land ownerships or other units to assess the extent of recent...
Categories: Data;
Tags: BARRIER ISLANDS,
BARRIER ISLANDS,
BARRIER ISLANDS,
BARRIER ISLANDS,
COASTAL AREAS,
This project resulted in an extensive mapping of coastal change along the entire coastline of the Western Alaska Landscape Conservation Cooperative (LCC). The work provides important baseline information on the distribution and magnitude of landscape changes over the past 41 years. The extent of change to the coastline and to coastal features, such as spits, barrier islands, estuaries, tidal guts and lagoons, was known to be substantial in some areas along the coast (e.g., portions of the Yukon–Kuskokwim Delta), although the extent of change along the full Bering Sea coast was not well documented. With this analysis, changes can be summarized for different land ownerships or other units to assess the extent of recent...
Categories: Data;
Tags: BARRIER ISLANDS,
BARRIER ISLANDS,
BARRIER ISLANDS,
BARRIER ISLANDS,
COASTAL AREAS,
Categories: Publication;
Types: Citation;
Tags: ASFA 2: Ocean Technology Policy & Non-Living Resources; Ocea,
Carbon cycle,
Coral reefs,
Ecosystems,
ISEW, South China Sea, Nansha,
Categories: Publication;
Types: Citation;
Tags: *RAINFALL-RUNOFF RELATIONSHIPS,
*URBANIZATION,
*WATER POLLUTION SOURCES,
CITIES,
EROSION,
Categories: Publication;
Types: Citation;
Tags: Buildings,
Clay,
Climate change,
Cracks,
Digital calipers,
Categories: Publication;
Types: Citation;
Tags: Barriers,
Civil engineering,
Clay,
Clay Linings,
Clays,
Categories: Publication;
Types: Citation;
Tags: SW 0840 Groundwater,
USA, Santa Cruz Basin,
Water Resources Abstracts,
aquifer systems,
groundwater level,
Categories: Publication;
Types: Citation;
Tags: Coal,
Dams,
E2 20 Land Use,
EIS: Digests of Environmental Impact Statements,
Federal Land Policy and Management Act of 1976, Compliance,
The U.S. Geological Survey (USGS) in cooperation with the Harris‐Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, and Lone Star Groundwater Conservation District has produced this dataset of groundwater‐level altitudes and groundwater‐level altitude changes in the Chicot, Evangeline, and Jasper aquifers in the Houston‐Galveston region, Texas. This dataset shows current‐year (2018) groundwater‐level altitudes for each aquifer, 5‐year (2013‐18) groundwater‐level changes for each aquifer, long‐term (1990‐2018 and 1977‐2018) groundwater‐level changes for the Chicot and Evangeline aquifers, and long‐term (2000‐2018) groundwater‐level change for the Jasper aquifer. The groundwater‐level measurements...
The U.S. Geological Survey (USGS), in cooperation with the Harris-Galveston Subsidence District and Fort Bend Subsidence District, constructed a finite-difference numerical groundwater-flow model of the northern Gulf Coast aquifer region for 1897 through 2018 using MODFLOW 6 with the Newton formulation solver to simulate groundwater flow and land-surface subsidence. Model parameter estimation and uncertainty analysis were conducted with PEST++ Iterative Ensemble Smoother software. The simulated results are described in the associated U.S. Geological Survey Professional Paper 1877. The model archive includes all the necessary files to run the MODFLOW 6 model and process the results for the posterior base realization...
Changes to the coastline and to coastal features, such as spits, barrier islands, estuaries, tidal guts and lagoons were mapped for over 22,000 km of coastline along the Bering Sea and Gulf of Alaska coasts in western Alaska. Changes to rivers and lakes near the coast were also captured. The analysis was based on time-series analysis of Landsat imagery, 1972–2013. An annual imeseries of suitable Landsat imagery was compiled and analyzed for changes in near-infrared reflectance to identify areas that transitioned from land to water, or vice-versa, over the study period. The timing of changes was also identified. Thousands of coastal changes over the 42-year study period exceeded the 60-m pixel resolution of the Multispectral...
Categories: Data;
Tags: BARRIER ISLANDS,
BARRIER ISLANDS,
BARRIER ISLANDS,
BARRIER ISLANDS,
COASTAL AREAS,
Categories: Publication;
Types: Citation;
Tags: Biologic Assessments,
Canals,
Cultural Resources Surveys,
Dams,
Diversion Structures,
Categories: Publication;
Types: Citation;
Tags: Coal,
Cultural Resources,
Drainage,
E2 20 Land Use,
EIS: Digests of Environmental Impact Statements,
Categories: Publication;
Types: Citation;
Tags: Air Quality,
Air Quality Assessments,
Archaeological Sites,
Birds,
Colorado,
Categories: Publication;
Types: Citation;
Tags: Coal,
Cultural Resources,
Drainage,
E2 20 Land Use,
EIS: Digests of Environmental Impact Statements,
Categories: Publication;
Types: Citation;
Tags: ASFA 2: Ocean Technology Policy & Non-Living Resources; Ocea,
Facies,
Mineralogy,
Palaeo studies,
Palaeozoic,
Categories: Publication;
Types: Citation;
Tags: ASFA 2: Ocean Technology Policy & Non-Living Resources; Ocea,
Channels,
Deep-sea fans,
Glaciation,
PSW, Weddell Sea,
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