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Flood inundation depth for a flow of 2,578 cfs (stage 15) at gage 14211500, Johnson Creek near Sycamore, Oregon (sycor_15.tif) The basis for these features is U.S. Geological Survey Scientific Investigations Report 2017-5024 Flood Inundation Mapping Data for Johnson Creek near Sycamore, Oregon. The domain of the HEC-RAS hydraulic model is a 12.9-mile reach of Johnson Creek from just upstream of SE 174th Avenue in Portland, Oregon, to its confluence with the Willamette River. Some of the hydraulics used in the model were taken from Federal Emergency Management Agency, 2010, Flood Insurance Study, City of Portland, Oregon, Multnomah, Clackamas, and Washington Counties, Volume 1 of 3, November 26, 2010. The Digital Elevation Model (DEM) utilized for the project was developed from lidar data flown in 2015 and provided by the Oregon Department... Types: Citation; Tags: Johnson Creek, Portland, Oregon, Willamette Valley, digital elevation models, floods, All tags... hydrology, inlandWaters, stream discharge, streamflow, Fewer tags Areas of uncertainty for flood inundation extents at gage 14211500, Johnson Creek near Sycamore, Oregon (sycor_breach.shp) ​The basis for these features is U.S. Geological Survey Scientific Investigations Report 2017-5024 Flood Inundation Mapping Data for Johnson Creek near Sycamore, Oregon. The domain of the HEC-RAS hydraulic model is a 12.9-mile reach of Johnson Creek from just upstream of SE 174th Avenue in Portland, Oregon, to its confluence with the Willamette River. Some of the hydraulics used in the model were taken from Federal Emergency Management Agency, 2010, Flood Insurance Study, City of Portland, Oregon, Multnomah, Clackamas, and Washington Counties, Volume 1 of 3, November 26, 2010. The Digital Elevation Model (DEM) utilized for the project was developed from lidar data flown in 2015 and provided by the Oregon Department... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Johnson Creek, Portland, Oregon, Willamette Valley, digital elevation models, floods, All tags... hydrology, inlandWaters, stream discharge, streamflow, Fewer tags Has the magnitude of floods across the USA changed with global CO2 levels? Abstract Statistical relationships between annual floods at 200 long-term (85–127 years of record) streamgauges in the coterminous United States and the global mean carbon dioxide concentration (GMCO2) record are explored. The streamgauge locations are limited to those with little or no regulation or urban development. The coterminous US is divided into four large regions and stationary bootstrapping is used to evaluate if the patterns of these statistical associations are significantly different from what would be expected under the null hypothesis that flood magnitudes are independent of GMCO2. In none of the four regions defined in this study is there strong statistical evidence for flood magnitudes increasing... Categories: Publication; Types: Citation; Tags: Tr, carbon dioxide, climate change, floods, statistics Flood-Inundation Grids and Shapefiles for the Lower Pawcatuck River in Westerly, Rhode Island, and Stonington and North Stonington, Connecticut A series of 11 digital flood-inundation maps were developed for a 5.5 mile reach of the lower Pawcatuck River in Westerly, Rhode Island and Stonington and North Stonington, Connecticut by the U.S. Geological Survey in cooperation with the Town of Westerly, Rhode Island and the Rhode Island Office of Housing and Community Development. The coverage of the maps extends from downstream from the Ashaway River inflow at the Westerly, Rhode Island and North Stonington, Connecticut State border to about 500 feet (ft) downstream of the U.S. Route 1/Broad Street bridge on the state border between Westerly, Rhode Island and Stonington, Connecticut. A hydraulic model was used to compute water-surface profiles for 11 flood stages... Types: Citation; Tags: Connecticut, New London County, North Stonington, Pawcatuck River, Rhode Island, All tags... Stonington, USGS Science Data Catalog (SDC), Washington County, Water Resources, Westerly, flood inundation, flood preparedness, floods, hydrologic maps, streamflow, Fewer tags Generalizing a nonlinear geophysical flood theory to medium-sized river networks The central hypothesis of a nonlinear geophysical flood theory postulates that, given space-time rainfall intensity for a rainfall-runoff event, solutions of coupled mass and momentum conservation differential equations governing runoff generation and transport in a self-similar river network produce spatial scaling, or a power law, relation between peak discharge and drainage area in the limit of large area. The excellent fit of a power law for the destructive flood event of June 2008 in the 32,400-km2 Iowa River basin over four orders of magnitude variation in drainage areas supports the central hypothesis. The challenge of predicting observed scaling exponent and intercept from physical processes is explained.... Categories: Publication; Types: Citation; Tags: Climate, floods, scaling theory Flood inundation mapping data for Johnson Creek near Sycamore, Oregon ​The basis for these features is U.S. Geological Survey Scientific Investigations Report 2017-5024 Flood Inundation Mapping Data for Johnson Creek near Sycamore, Oregon. The domain of the HEC-RAS hydraulic model is a 12.9-mile reach of Johnson Creek from just upstream of SE 174th Avenue in Portland, Oregon, to its confluence with the Willamette River. Some of the hydraulics used in the model were taken from Federal Emergency Management Agency, 2010, Flood Insurance Study, City of Portland, Oregon, Multnomah, Clackamas, and Washington Counties, Volume 1 of 3, November 26, 2010. The Digital Elevation Model (DEM) utilized for the project was developed from lidar data flown in 2015 and provided by the Oregon Department... Types: Citation; Tags: Johnson Creek, Portland, Oregon, USGS Science Data Catalog (SDC), Willamette Valley, digital elevation models, All tags... floods, hydrology, inlandWaters, stream discharge, streamflow, Fewer tags Flood inundation depth for a flow of 3,080 cfs (stage 16) at gage 14211500, Johnson Creek near Sycamore, Oregon (sycor_16.tif) ​The basis for these features is U.S. Geological Survey Scientific Investigations Report 2017-5024 Flood Inundation Mapping Data for Johnson Creek near Sycamore, Oregon. The domain of the HEC-RAS hydraulic model is a 12.9-mile reach of Johnson Creek from just upstream of SE 174th Avenue in Portland, Oregon, to its confluence with the Willamette River. Some of the hydraulics used in the model were taken from Federal Emergency Management Agency, 2010, Flood Insurance Study, City of Portland, Oregon, Multnomah, Clackamas, and Washington Counties, Volume 1 of 3, November 26, 2010. The Digital Elevation Model (DEM) utilized for the project was developed from lidar data flown in 2015 and provided by the Oregon Department... Types: Citation; Tags: Johnson Creek, Portland, Oregon, Willamette Valley, digital elevation models, floods, All tags... hydrology, inlandWaters, stream discharge, streamflow, Fewer tags Shapefile of the flood-inundation maps for the White River at Noblesville, Indiana Digital flood-inundation maps for a 7.5-mile reach of the White River at Noblesville, Indiana, were created by the U.S. Geological Survey (USGS) in cooperation with the Indiana Department of Transportation. The flood-inundation maps, which can be accessed through the USGS Flood Inundation Mapping Science website at https://water.usgs.gov/osw/flood_inundation/, depict estimates of the areal extent and depth of flooding corresponding to selected water levels (stages) at the White River at Noblesville, Ind., streamgage (USGS station number 03349000). Real-time stages at this streamgage may be obtained from the USGS National Water Information System at https://waterdata.usgs.gov/nwis or the National Weather Service... Categories: Data; Types: Citation; Tags: City of Noblesville, Indiana, Noblesville, United States, White River, All tags... flood-inundation maps, floodplain, floodplains, floods, geospatial analysis, geospatial datasets, high-water marks, hydraulic engineering, hydrology, inlandWaters, maps and atlases, river, stream, streamflow, Fewer tags Peak Flow File November 19 2008 A comma separated values (csv) file that is a snapshot of the U.S. Geological Survey peak flow file on November 19, 2008. The file lists agency, station identification, water year, peak date, peak values, peak qualification codes, gage height values, gage height qualification codes and year of last peak for all stream gaging stations for which peak streamflow has been recorded. Categories: Data; Types: Citation; Tags: Datasets, Floods, Stream discharge, Streamflow data, United States Scale-independent assessment of discharge reduction and riparian disconnectivity following flow regulation by dams By using the established hydraulic relationships among flood frequency, flood magnitude, and river-channel capacity, we develop a scale-independent assessment of the hydrogeomorphic impacts of 21 dams across the United States that have broad ranges in function and contributing drainage area. On the basis of generalized extreme value (GEV) analysis of pre- and post-dam hydrologic records, our analysis indicates that the 2 yr discharge has decreased ~60% following impoundment, exceeding the magnitude of climatically triggered discharge reductions occurring during the Holocene. Reductions in the frequency of the pre-dam 2 yr discharge have been equally profound. The pre-dam 2 yr flood has occurred on average twice... Categories: Publication; Types: Citation, Journal Citation; Tags: Geology, dams, floods, hydrologic regime, riparian Ground-water surface-water interactions and long-term change in riverine riparian vegetation in the southwestern United States Riverine riparian vegetation has changed throughout the southwestern United States, prompting concern about losses of habitat and biodiversity. Woody riparian vegetation grows in a variety of geomorphic settings ranging from bedrock-lined channels to perennial streams crossing deep alluvium and is dependent on interaction between ground-water and surface-water resources. Historically, few reaches in Arizona, southern Utah, or eastern California below 1530 m elevation had closed gallery forests of cottonwood and willow; instead, many alluvial reaches that now support riparian gallery forests once had marshy grasslands and most bedrock canyons were essentially barren. Repeat photography using more than 3000 historical... Categories: Publication; Types: Citation; Tags: Channel change, Floods, Ground water, Surface water, geomorphology, All tags... riparian vegetation, Fewer tags Application of an extreme winter storm scenario to identify vulnerabilities, mitigation options, and science needs in the Sierra Nevada mountains, USA Abstract (from http://link.springer.com/article/10.1007%2Fs11069-015-2003-4): In the Sierra Nevada mountains (USA), and geographically similar areas across the globe where human development is expanding, extreme winter storm and flood risks are expected to increase with changing climate, heightening the need for communities to assess risks and better prepare for such events. In this case study, we demonstrate a novel approach to examining extreme winter storm and flood risks. We incorporated high-resolution atmospheric–hydrologic modeling of the ARkStorm extreme winter storm scenario with multiple modes of engagement with practitioners, including a series of facilitated discussions and a tabletop emergency management... Categories: Publication; Types: Citation; Tags: Climate Change, Drought, Fire and Extreme Weather, Emergency preparedness, Extreme Weather, Floods, All tags... Southwest CASC, Winter storm hazards, Fewer tags Extreme events in streams and rivers in arctic and subarctic regions in an uncertain future * We review the predicted changes in extreme events following climate change in flowing waters in arctic and subarctic regions. These regions are characterised by tundra or taiga ecosystems in either erosional or depositional glacial landforms or presently glacierised areas of the Northern Hemisphere. * The ecological and geomorphic effects of extreme meteorological and hydrological events, such as episodes of strongly increased precipitation, temperatures and flows, can be exacerbated by altered base conditions. For example, winter temperature variations between frost and thaw will become more frequent at many places because mean temperature during the winter is closer to 0 °C, potentially leading to changes in... Categories: Publication; Types: Citation; Tags: climate change, extreme events, floods, permafrost, rivers Flood inundation extents for flows of 800 to 3,080 cfs at gage 14211500, Johnson Creek near Sycamore, Oregon (sycor.shp) The basis for these features is U.S. Geological Survey Scientific Investigations Report 2017-5024 Flood Inundation Mapping Data for Johnson Creek near Sycamore, Oregon. The domain of the HEC-RAS hydraulic model is a 12.9-mile reach of Johnson Creek from just upstream of SE 174th Avenue in Portland, Oregon, to its confluence with the Willamette River. Some of the hydraulics used in the model were taken from Federal Emergency Management Agency, 2010, Flood Insurance Study, City of Portland, Oregon, Multnomah, Clackamas, and Washington Counties, Volume 1 of 3, November 26, 2010. The Digital Elevation Model (DEM) utilized for the project was developed from lidar data flown in 2015 and provided by the Oregon Department... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Johnson Creek, Portland, Oregon, Willamette Valley, digital elevation models, floods, All tags... hydrology, inlandWaters, stream discharge, streamflow, Fewer tags Lower Rio Puerco GPS survey data collected in 2002, 2007, 2010, and 2014 High-precision (Real-time kinematic) Global Positioning System (GPS) surveys were conducted along the lower Rio Puerco in April 2002, January 2007, April 2010, and April 2014 to support a long-term study of geomorphic processes and the geomorphic history of the arroyo. The study reach extends from the confluence with the Rio San Jose 67 km downvalley to the old Highway 85 bridge near the USGS streamgage near Bernardo, NM. Individual shapefiles were created for data from each survey. Associated metadata files include the names of surveyors and equipment used. The survey extents varied, but all have overlapping points, including repeat surveys of arroyo cross sections. Results from analyses of these data were published... Types: Citation; Tags: Bernalillo County, Bernardo, NM, GPS survey data, New Mexico, Rio Puerco, All tags... Socorro County, Valencia County, arroyos, floods, geomorphology, riparian vegetation, saltcedar, semiarid, stream channel, Fewer tags Percentage Differences Streamflow A comma separated values (csv) file that is a snapshot of percent difference between November 19, 2008 and November 14, 2016 peak streamflow. The file lists station identification, water year, original (2008) peak Q, current (2016) peak Q and percent difference calculated per water year. The percent difference was calculated as the absolute value of [(current peak Q - original peak Q)/(original peak Q) x 100], where current peak Q is the 2016 peak and the original peak Q is the 2008 peak. When an original peak Q value is 0, the resultant percent difference calculation is undefined because of division by 0. In these cases, the percent difference field is populated with NA. Those entries are included in the data file... Categories: Data; Types: Citation; Tags: Datasets, Floods, Stream discharge, Streamflow data, United States The impacts of climatic changes for water resources of the Colorado and Sacramento-San Joaquin River basins A wide variety of regional assessments of the water-related impacts of climatic change have been done over the past two decades, using different methods, approaches, climate models, and assumptions. As part of the Water Sector research for the National Assessment of the Implications of Climatic Variability and Change for the United States, several major summaries have been prepared, looking at the differences and similarities in results among regional research projects. Two such summaries are presented here, for the Colorado River Basin and the Sacramento River Basin. Both of these watersheds are vitally important to the social, economic, and ecological character of their regions; both are large snowmelt-driven... Categories: Publication; Types: Citation, Journal Citation; Tags: Journal of the American Water Resources Association, climatic change, droughts, floods, modeling, All tags... water policy, water resources, watershed management, Fewer tags Predicting Waterbird Nest Distributions on the Yukon–Kuskokwim Delta of Alaska The Yukon–Kuskokwim Delta of Alaska,USAis a globally important region for numerous avianspecies including millions of migrating and nesting waterbirds.However, data on the current spatial distributionof critical nesting areas and the importance of environmental variables in the selection of nest locations aregenerally lacking for waterbirds in this region.We modeled nest densities for 6 species of geese and eiders thatcommonly breed on the Yukon–Kuskokwim Delta, including cackling goose (Branta hutchinsii minima),emperor goose (Chen canagica), black brant (B. bernicla nigricans), greater white-fronted goose (Anser albifronsfrontalis), spectacled eider (Somateria fischeri), and common eider (S. mollissima).Thedata... Categories: Data, Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: BIRDS, BIRDS, CLIMATE CHANGE IMPACT ASSESSMENT MODELS, CLIMATE CHANGE IMPACT ASSESSMENT MODELS, DELTAS, All tags... DELTAS, DELTAS, DELTAS, DUCKS/GEESE/SWANS, DUCKS/GEESE/SWANS, ENDANGERED SPECIES, ENDANGERED SPECIES, EROSION, EROSION, ESTUARINE WETLANDS, ESTUARINE WETLANDS, FLOODS, FLOODS, Federal resource managers, HABITAT CONVERSION/FRAGMENTATION, HABITAT CONVERSION/FRAGMENTATION, INUNDATION, INUNDATION, LCC Network Science Catalog, PALUSTRINE WETLANDS, PALUSTRINE WETLANDS, Policy makers & regulators, Publication, SALTWATER INTRUSION, SALTWATER INTRUSION, SEA LEVEL RISE, SEA LEVEL RISE, SEA LEVEL RISE, SEA LEVEL RISE, SEDIMENT TRANSPORT, SEDIMENT TRANSPORT, SEDIMENTATION, SEDIMENTATION, SEVERE STORMS, SEVERE STORMS, SPECIES LIFE HISTORY, SPECIES LIFE HISTORY, STORM SURGE, STORM SURGE, STORMS, STORMS, Tribes, USE/FEEDING HABITATS, USE/FEEDING HABITATS, WETLANDS, WETLANDS, Western Alaska Landscape Conservation Cooperative data.gov, biota, biota, climatologyMeteorologyAtmosphere, climatologyMeteorologyAtmosphere, completed, environment, environment, imageryBaseMapsEarthCover, imageryBaseMapsEarthCover, oceans, oceans, Fewer tags Geospatial Data and Surface-Water Model Archive for a Flood-Inundation Mapping Study of the Wabash River at Lafayette, Indiana The development and the generation of the datasets that are published through this data release, were based on the results and findings of the report mentioned here: Kim, M.H., 2018, Flood-inundation maps for the Wabash River at Lafayette, Indiana: U.S. Geological Survey Scientific Investigations Report 2018–5017, 10 p., https://doi.org/10.3133/sir20185017. The geospatial dataset contain final versions of the raster and vector geospatial data and its related metadata, and the model archive dataset contains all relevant files to document and re-run the surface-water (SW) hydraulic model that are discussed in the report. Types: Citation; Tags: GIS, Indiana, Lafayette, Tippecanoe County, USGS Science Data Catalog (SDC), All tags... United States, Wabash River, flood-inundation maps, floodplain, floodplains, floods, geographic information system, geospatial analysis, geospatial data, geospatial datasets, high-water marks, hydraulic engineering, hydraulic model, hydrology, inlandWaters, inlandWaters, maps and atlases, model archive, river, stream, streamflow, Fewer tags Flood inundation depth for a flow of 982 cfs (stage 10) at gage 14211500, Johnson Creek near Sycamore, Oregon (sycor_10.tif) ​The basis for these features is U.S. Geological Survey Scientific Investigations Report 2017-5024 Flood Inundation Mapping Data for Johnson Creek near Sycamore, Oregon. The domain of the HEC-RAS hydraulic model is a 12.9-mile reach of Johnson Creek from just upstream of SE 174th Avenue in Portland, Oregon, to its confluence with the Willamette River. Some of the hydraulics used in the model were taken from Federal Emergency Management Agency, 2010, Flood Insurance Study, City of Portland, Oregon, Multnomah, Clackamas, and Washington Counties, Volume 1 of 3, November 26, 2010. The Digital Elevation Model (DEM) utilized for the project was developed from lidar data flown in 2015 and provided by the Oregon Department... Types: Citation; Tags: Johnson Creek, Portland, Oregon, Willamette Valley, digital elevation models, floods, All tags... hydrology, inlandWaters, stream discharge, streamflow, Fewer tags 1 2 3 »