U.S. Geological Survey Fact Sheet最新文献_第5页

Geologic influences on the quality of groundwater used for domestic supply in the northern Sierra Nevada Foothills 内华达山脉北部山麓地区地下水水质的地质影响

U.S. Geological Survey Fact Sheet Pub Date : 2021-01-01 DOI: 10.3133/FS20213013

Zeno F. Levy, M. Fram

引用次数: 0

Earth Resources Observation and Science Center hosting services 地球资源观测与科学中心托管服务

U.S. Geological Survey Fact Sheet Pub Date : 2021-01-01 DOI: 10.3133/fs20213018

引用次数: 1

Visualizing proximity of non-native species to protected areas of the United States—A proximity visualization tool for BISON 可视化非本地物种与美国保护区的接近度-野牛的接近度可视化工具

U.S. Geological Survey Fact Sheet Pub Date : 2021-01-01 DOI: 10.3133/fs20213027

Travis J. Harrison, E. Hlavacek, Jennifer Dieck

引用次数: 0

Using satellite imagery to estimate consumptive water use from irrigated lands in the Milk River Basin, United States and Canada 利用卫星图像估计美国和加拿大米尔克河流域灌溉土地的耗水量

U.S. Geological Survey Fact Sheet Pub Date : 2021-01-01 DOI: 10.3133/fs20213042

Roy Sando, M. Friedrichs, G. Senay

引用次数: 0

Hydrologic conditions in Kansas, water year 2020 堪萨斯州的水文条件，水年2020

U.S. Geological Survey Fact Sheet Pub Date : 2021-01-01 DOI: 10.3133/fs20213045

Chantelle Davis

引用次数: 0

Geochemical and mineralogical properties of Boquillas Shale geochemical reference material ShBOQ-1 Boquillas页岩地球化学基准物质ShBOQ-1的地球化学和矿物学性质

U.S. Geological Survey Fact Sheet Pub Date : 2021-01-01 DOI: 10.3133/fs20213048

J. Birdwell, S. Wilson

引用次数: 0

Water priorities for the Nation—USGS Integrated Water Science basins 国家-美国地质调查局综合水科学流域的水优先事项

U.S. Geological Survey Fact Sheet Pub Date : 2021-01-01 DOI: 10.3133/fs20213041

Mark P. Miller, S. Eberts, L. Sprague

引用次数: 2

Michigan and Landsat 密歇根和地球资源卫星

U.S. Geological Survey Fact Sheet Pub Date : 2021-01-01 DOI: 10.3133/fs20213047

引用次数: 0

3D Elevation Program supports broadband internet access 3D Elevation Program支持宽带互联网接入

U.S. Geological Survey Fact Sheet Pub Date : 2021-01-01 DOI: 10.3133/fs20213056

C. Thatcher, V. Lukas

{"title":"3D Elevation Program supports broadband internet access","authors":"C. Thatcher, V. Lukas","doi":"10.3133/fs20213056","DOIUrl":"https://doi.org/10.3133/fs20213056","url":null,"abstract":"Broadband, which is a high-speed, always-on internet connection, is critical to the modern economy and education, as well as to healthcare, public safety, government services, entertainment, and more. However, according to the Federal Communications Commission (FCC), millions of Americans in rural parts of the country currently lack access to broadband. Federal and State agencies have launched initiatives to enhance broadband access in rural America. High-resolution light detection and ranging (lidar) data can play a role in improving maps of broadband accessibility and helping to strengthen the broadband communications network. Lidar underpins signal propagation analyses to determine where broadband signals from communication towers can and cannot reach across the landscape and can be used to determine optimal siting of new towers and cell stations to increase broadband coverage. The 3D Elevation Program (3DEP; see sidebar) is managed by the U.S. Geological Survey in partnership with Federal, State, Tribal, U.S. territorial, and local agencies to acquire consistent lidar coverage for the Nation. Lidar provides high-resolution, very accurate three-dimensional (3D) data representations of constructed and natural features on the Earth’s surface. Bare-earth and digital surface models derived from lidar are used in viewshed analyses for signal propagation studies necessary to identify the optimum locations for cell tower and cell station networks. Viewshed analysis, also known as line-of-sight analysis, determines the visibility of objects or areas from different points of view, such as from the top of a transmission tower (fig. 1). Objects such as buildings, hills, and other features (referred to as clutter in the communications industry) can attenuate or block signals, which reduces the coverage area of a broadband signal transmitter.","PeriodicalId":36286,"journal":{"name":"U.S. Geological Survey Fact Sheet","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69286075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Assessment of undiscovered gas resources in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska, 2021 阿拉斯加西北坡上泥盆统至下白垩统未发现天然气资源评价，2021

U.S. Geological Survey Fact Sheet Pub Date : 2021-01-01 DOI: 10.3133/FS20213003

D. Houseknecht, T. Mercier, C. J. Schenk, T. Moore, W. Rouse, J. Dumoulin, W. Craddock, R. Lease, P. Botterell, M. Sanders, Rebecca A. Smith, C. Connors, C. P. Garrity, K. Whidden, J. Gooley, J. Counts, J. Long, C. DeVera

{"title":"Assessment of undiscovered gas resources in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska, 2021","authors":"D. Houseknecht, T. Mercier, C. J. Schenk, T. Moore, W. Rouse, J. Dumoulin, W. Craddock, R. Lease, P. Botterell, M. Sanders, Rebecca A. Smith, C. Connors, C. P. Garrity, K. Whidden, J. Gooley, J. Counts, J. Long, C. DeVera","doi":"10.3133/FS20213003","DOIUrl":"https://doi.org/10.3133/FS20213003","url":null,"abstract":"The U.S. Geological Survey (USGS) assessed the potential for undiscovered, technically recoverable gas resources in conventional accumulations in Upper Devonian to Lower Cretaceous strata of the western North Slope of Alaska, including adjacent State waters (fig. 1). The western North Slope lies north of the Brooks Range, west of the National Petroleum Reserve−Alaska (NPR−A), and east of the Chukchi Sea. The western North Slope was included in previous assessments of (1) conventional resources of the Cretaceous Nanushuk and Torok Formations in the NPR−A and adjacent areas (Houseknecht and others, 2017) and (2) continuous resources of the entire North Slope (Houseknecht and others, 2012). Thus, rocks considered in this assessment are limited to strata older than the Torok Formation and younger than the acoustic basement (fig. 2). The assessment area contains sparse subsurface data, including three exploration wells (fig. 1) drilled between 1978 and 1982 and about 500 miles (800 kilometers) of vintage (1970−1971) two-dimensional (2D) seismic data. These were supplemented by geologic maps of the western North Slope and adjacent areas (for example, Mull and others, 2000). Additional well and 2D seismic data from the NPR−A and Chukchi Sea were used to construct a more robust geologic framework for the assessment. Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 1,407 billion (1.4 trillion) cubic feet of gas in conventional accumulations in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska.","PeriodicalId":36286,"journal":{"name":"U.S. Geological Survey Fact Sheet","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69285206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0