Thomas L Weaver (Former Employee)
Science and Products
Michigan Streamflow Data Available Online
The USGS in Michigan-in cooperation with local, State, Tribal, and Federal partners-operates 155 streamgages recording stage and streamflow, and 13 lake-level gages. There are about 7,400 streamgages nationwide; many of these gages provide real-time data in 15-minute increments, which typically are transmitted to the World Wide Web every 1 to 2 hours using satellite, telephone, or cellular phone...
Water-Quality Monitor Network in Michigan
The USGS operates a network of real-time water-quality monitoring stations that measure up to five physical parameters. The parameters are temperature, specific conductance, pH, dissolved oxygen, and turbidity. One to four of those parameters are measured at 26 sites, while all five parameters are measured at 13 sites. These data are used for decision making about hydroelectric power generation...
Connecting Channels
In response to decreasing water levels in the Great Lakes, especially Lake Michigan and Lake Huron, the International Upper Great Lakes Study (IUGLS) asked USGS to continuously measure flows in the connecting channels of St. Marys, St. Clair, and Detroit Rivers, and Water Survey Canada (WSC) to measure flows of Niagara River. To accommodate the effects of variable backwater and the unsteadiness of...
Crest-Stage Streamgage Network in Michigan
Historically, small streams with drainage areas less than 100 square miles have not been adequately represented in regional peak- (high) flow analysis. In Michigan, USGS operates 24 traditional crest-stage gages, where stage and streamflow is only measured during high flows, and 6 continuous-record crest-stage gages, where cooperators can continually monitor stage and USGS maintains a high-flow...
Acoustics
Upper Midwest Water Science Center uses acoustic meters for making streamflow measurements. Wading measurements are done using a modified top setting wading rod equipped with an acoustic Doppler velocimeter (ADV). Acoustic Doppler current profilers (ADCP) are used when measurement depths are too deep to wade. ADCP measurements can either be made with a tether or cableway or deployed on a manned...
Low-Flow Streamgage Network in Michigan
Data on low-flow characteristics are used by water-resources managers for a variety of purposes, including water-supply planning, making decisions about wastewater-discharge and water withdrawal permits, and evaluating in-stream flow requirements. The Michigan low-flow network currently consists of seven sites where streamflow is typically measured only during low-flow periods. In addition to...
Magnitude conversion and earthquake recurrence rate models for the central and eastern United States
Development of Seismic Source Characterization (SSC) models, which is an essential part of Probabilistic Seismic Hazard Analyses (PSHA), can help forecast the temporal and spatial distribution of future damaging earthquakes (𝑀w≥ 5) in seismically active regions. Because it is impossible to associate all earthquakes with known faults, seismic source models for PSHA often include sources...
Authors
Rasool Anooshehpoor, Thomas L. Weaver, Jon Ake, Cliff Munson, Morgan P. Moschetti, David R. Shelly, Peter M. Powers
Nutrient and suspended-sediment concentrations in the Maumee River and tributaries during 2019 rain-induced fallow conditions
Above average precipitation from October 2018 through July 2019 in the Maumee River (R.) Basin resulted in 29% of cropland left fallow, providing a glimpse of potential effects from decreased nutrient application. Ongoing monitoring at 15 water-quality sites on the Maumee R. upstream from Defiance enabled comparison with 2017, which was hydrologically similar to 2019 in precipitation and...
Authors
Tanja N. Williamson, Kimberly Shaffer, Donna L. Runkle, Matthew John Hardebeck, Edward G. Dobrowolski, Jeffrey W. Frey, Nancy T. Baker, Katie Marie Collier, Carrie A. Huitger, Stephanie P. Kula, Ralph J. Haefner, Lisa M Hartley, Hunter Frederick Crates, J. Jeremy Webber, Dennis P. Finnegan, Nicholas J. Reithel, Chad Toussant, Thomas L. Weaver
Water quality and hydrology of the Yellow Dog and Salmon Trout Watersheds, Marquette County, Michigan 2013–16
In 2013, the U.S. Geological Survey, in cooperation with the Keweenaw Bay Indian Community, began monitoring the water quality of springs and seeps within the Yellow Dog and Salmon Trout watersheds in Marquette County, Michigan. The objectives of this study were to (1) monitor streamflow and analyze the hydrology of the watersheds and (2) characterize the water quality in the watersheds...
Authors
Christopher J. Hoard, Thomas L. Weaver
Water quality and hydrology of the Silver River Watershed, Baraga County, Michigan, 2005-08
The Silver River Watershed comprises about 69 square miles and drains part of northeastern Baraga County, Michigan. For generations, tribal members of the Keweenaw Bay Indian Community have hunted and fished in the watershed. Tribal government and members of Keweenaw Bay Indian Community are concerned about the effect of any development within the watershed, which is rural, isolated, and...
Authors
Thomas L. Weaver, Daniel J. Sullivan, Cynthia M. Rachol, James M. Ellis
Environmental baseline study of the Huron River Watershed, Baraga and Marquette Counties, Michigan
This report summarizes results of a study to establish water-quality and geochemical baseline conditions within a small watershed in the Lake Superior region. In 2008, the U.S. Geological Survey (USGS) completed a survey of water-quality parameters and soil and streambed sediment geochemistry of the 83 mi2 Huron River Watershed in the Upper Peninsula of Michigan. Streamflow was measured...
Authors
Laurel G. Woodruff, Thomas L. Weaver, William F. Cannon
Stream-water quality during storm-runoff events and low-flow periods in the St. Clair River/Lake St. Clair Basin, Michigan
This report, a product of the Lake St. Clair Regional Monitoring Project, describes four water-quality studies in the St. Clair River/Lake St. Clair Basin from the early 1970's through 2005. All the studies examined water quality of streams in the basin; the most recent studies focused primarily on water quality during high- and low-streamflows. This report explains how storm-runoff and...
Authors
Thomas L. Weaver, Lori M. Fuller
Hydrogeologic framework of Mississippian rocks in the central Lower Peninsula of Michigan
Sedimentary rocks of Mississippian age form the lower part of a regional aquifer system in the central Lower Peninsula of Michigan. Strata of the Michigan Formation, the Marshall Sandstone, and the Coldwater Shale were subdivided into an aquifer and two confining units on the basis of hydraulic properties. The Michigan confining unit consists of shale, limestone, dolomite, gypsum...
Authors
David B. Westjohn, Thomas L. Weaver
Hydrogeologic framework of Pennsylvanian and Late Mississippian rocks in the central lower peninsula of Michigan
Late Mississippian and Pennsylvanian sedimentary rocks form part of a regional system of aquifers and confining units in the central Lower Peninsula of Michigan. The upper part of the Pennsylvanian rock sequence constitutes the Saginaw aquifer, which consists primarily of sandstone. This sandstone aquifer overlies the Saginaw confining unit, which consists primarily of shale. The Saginaw...
Authors
David B. Westjohn, Thomas L. Weaver
Hydrogeology of Pleistocene glacial deposits and Jurassic "red beds" in the central lower peninsula of Michigan
Geologic-log data were used to construct thickness and surface-configuration maps of Jurassic deposits, and a map of general composition of Pleistocene glacial deposits, in the central Lower Peninsula of Michigan. These geologic units form the upper part of a regional system of aquifers and confining units in the Michigan Basin. In the peninsula, most bedrock is covered by glacial...
Authors
David B. Westjohn, Thomas L. Weaver, K.F. Zacharias
Science and Products
Michigan Streamflow Data Available Online
The USGS in Michigan-in cooperation with local, State, Tribal, and Federal partners-operates 155 streamgages recording stage and streamflow, and 13 lake-level gages. There are about 7,400 streamgages nationwide; many of these gages provide real-time data in 15-minute increments, which typically are transmitted to the World Wide Web every 1 to 2 hours using satellite, telephone, or cellular phone...
Water-Quality Monitor Network in Michigan
The USGS operates a network of real-time water-quality monitoring stations that measure up to five physical parameters. The parameters are temperature, specific conductance, pH, dissolved oxygen, and turbidity. One to four of those parameters are measured at 26 sites, while all five parameters are measured at 13 sites. These data are used for decision making about hydroelectric power generation...
Connecting Channels
In response to decreasing water levels in the Great Lakes, especially Lake Michigan and Lake Huron, the International Upper Great Lakes Study (IUGLS) asked USGS to continuously measure flows in the connecting channels of St. Marys, St. Clair, and Detroit Rivers, and Water Survey Canada (WSC) to measure flows of Niagara River. To accommodate the effects of variable backwater and the unsteadiness of...
Crest-Stage Streamgage Network in Michigan
Historically, small streams with drainage areas less than 100 square miles have not been adequately represented in regional peak- (high) flow analysis. In Michigan, USGS operates 24 traditional crest-stage gages, where stage and streamflow is only measured during high flows, and 6 continuous-record crest-stage gages, where cooperators can continually monitor stage and USGS maintains a high-flow...
Acoustics
Upper Midwest Water Science Center uses acoustic meters for making streamflow measurements. Wading measurements are done using a modified top setting wading rod equipped with an acoustic Doppler velocimeter (ADV). Acoustic Doppler current profilers (ADCP) are used when measurement depths are too deep to wade. ADCP measurements can either be made with a tether or cableway or deployed on a manned...
Low-Flow Streamgage Network in Michigan
Data on low-flow characteristics are used by water-resources managers for a variety of purposes, including water-supply planning, making decisions about wastewater-discharge and water withdrawal permits, and evaluating in-stream flow requirements. The Michigan low-flow network currently consists of seven sites where streamflow is typically measured only during low-flow periods. In addition to...
Magnitude conversion and earthquake recurrence rate models for the central and eastern United States
Development of Seismic Source Characterization (SSC) models, which is an essential part of Probabilistic Seismic Hazard Analyses (PSHA), can help forecast the temporal and spatial distribution of future damaging earthquakes (𝑀w≥ 5) in seismically active regions. Because it is impossible to associate all earthquakes with known faults, seismic source models for PSHA often include sources...
Authors
Rasool Anooshehpoor, Thomas L. Weaver, Jon Ake, Cliff Munson, Morgan P. Moschetti, David R. Shelly, Peter M. Powers
Nutrient and suspended-sediment concentrations in the Maumee River and tributaries during 2019 rain-induced fallow conditions
Above average precipitation from October 2018 through July 2019 in the Maumee River (R.) Basin resulted in 29% of cropland left fallow, providing a glimpse of potential effects from decreased nutrient application. Ongoing monitoring at 15 water-quality sites on the Maumee R. upstream from Defiance enabled comparison with 2017, which was hydrologically similar to 2019 in precipitation and...
Authors
Tanja N. Williamson, Kimberly Shaffer, Donna L. Runkle, Matthew John Hardebeck, Edward G. Dobrowolski, Jeffrey W. Frey, Nancy T. Baker, Katie Marie Collier, Carrie A. Huitger, Stephanie P. Kula, Ralph J. Haefner, Lisa M Hartley, Hunter Frederick Crates, J. Jeremy Webber, Dennis P. Finnegan, Nicholas J. Reithel, Chad Toussant, Thomas L. Weaver
Water quality and hydrology of the Yellow Dog and Salmon Trout Watersheds, Marquette County, Michigan 2013–16
In 2013, the U.S. Geological Survey, in cooperation with the Keweenaw Bay Indian Community, began monitoring the water quality of springs and seeps within the Yellow Dog and Salmon Trout watersheds in Marquette County, Michigan. The objectives of this study were to (1) monitor streamflow and analyze the hydrology of the watersheds and (2) characterize the water quality in the watersheds...
Authors
Christopher J. Hoard, Thomas L. Weaver
Water quality and hydrology of the Silver River Watershed, Baraga County, Michigan, 2005-08
The Silver River Watershed comprises about 69 square miles and drains part of northeastern Baraga County, Michigan. For generations, tribal members of the Keweenaw Bay Indian Community have hunted and fished in the watershed. Tribal government and members of Keweenaw Bay Indian Community are concerned about the effect of any development within the watershed, which is rural, isolated, and...
Authors
Thomas L. Weaver, Daniel J. Sullivan, Cynthia M. Rachol, James M. Ellis
Environmental baseline study of the Huron River Watershed, Baraga and Marquette Counties, Michigan
This report summarizes results of a study to establish water-quality and geochemical baseline conditions within a small watershed in the Lake Superior region. In 2008, the U.S. Geological Survey (USGS) completed a survey of water-quality parameters and soil and streambed sediment geochemistry of the 83 mi2 Huron River Watershed in the Upper Peninsula of Michigan. Streamflow was measured...
Authors
Laurel G. Woodruff, Thomas L. Weaver, William F. Cannon
Stream-water quality during storm-runoff events and low-flow periods in the St. Clair River/Lake St. Clair Basin, Michigan
This report, a product of the Lake St. Clair Regional Monitoring Project, describes four water-quality studies in the St. Clair River/Lake St. Clair Basin from the early 1970's through 2005. All the studies examined water quality of streams in the basin; the most recent studies focused primarily on water quality during high- and low-streamflows. This report explains how storm-runoff and...
Authors
Thomas L. Weaver, Lori M. Fuller
Hydrogeologic framework of Mississippian rocks in the central Lower Peninsula of Michigan
Sedimentary rocks of Mississippian age form the lower part of a regional aquifer system in the central Lower Peninsula of Michigan. Strata of the Michigan Formation, the Marshall Sandstone, and the Coldwater Shale were subdivided into an aquifer and two confining units on the basis of hydraulic properties. The Michigan confining unit consists of shale, limestone, dolomite, gypsum...
Authors
David B. Westjohn, Thomas L. Weaver
Hydrogeologic framework of Pennsylvanian and Late Mississippian rocks in the central lower peninsula of Michigan
Late Mississippian and Pennsylvanian sedimentary rocks form part of a regional system of aquifers and confining units in the central Lower Peninsula of Michigan. The upper part of the Pennsylvanian rock sequence constitutes the Saginaw aquifer, which consists primarily of sandstone. This sandstone aquifer overlies the Saginaw confining unit, which consists primarily of shale. The Saginaw...
Authors
David B. Westjohn, Thomas L. Weaver
Hydrogeology of Pleistocene glacial deposits and Jurassic "red beds" in the central lower peninsula of Michigan
Geologic-log data were used to construct thickness and surface-configuration maps of Jurassic deposits, and a map of general composition of Pleistocene glacial deposits, in the central Lower Peninsula of Michigan. These geologic units form the upper part of a regional system of aquifers and confining units in the Michigan Basin. In the peninsula, most bedrock is covered by glacial...
Authors
David B. Westjohn, Thomas L. Weaver, K.F. Zacharias