Mark N Landers (Former Employee)
Science and Products
Filter Total Items: 28
Historic Flooding in South Georgia, March 27-April 3, 2009
A primary mission of the U.S. Geological Survey (USGS) is the measurement and documentation of the magnitude and extent of hydrologic hazards, such as floods, droughts, and hurricane storm surge. USGS personnel were deployed for historic widespread flooding that occurred throughout South Georgia from a storm event beginning in the late evening of March 27 and continuing through April 3, 2009. Data
Authors
Brian E. McCallum, Anthony J. Gotvald, Mark N. Landers
Methods to Evaluate Influence of Onsite Septic Wastewater-Treatment Systems on Base Flow in Selected Watersheds in Gwinnett County, Georgia, October 2007
The influence of onsite septic wastewater-treatment systems (OWTS) on base-flow quantity needs to be understood to evaluate consumptive use of surface-water resources by OWTS. If the influence of OWTS on stream base flow can be measured and if the inflow to OWTS is known from water-use data, then water-budget approaches can be used to evaluate consumptive use. This report presents a method to eval
Authors
Mark N. Landers, Paul D. Ankcorn
Watershed Effects on Streamflow Quantity and Quality in Six Watersheds of Gwinnett County, Georgia
Watershed management is critical for the protection and enhancement of streams that provide multiple benefits for Gwinnett County, Georgia, and downstream communities. Successful watershed management requires an understanding of how stream quality is affected by watershed characteristics. The influence of watershed characteristics on stream quality is complex, particularly for the nonpoint sources
Authors
Mark N. Landers, Paul D. Ankcorn, Keith W. McFadden
How Much Water Is in the Apalachicola, Chattahoochee, and Flint Rivers, and How Much Is Used?
Questions of how much water is in the Apalachicola, Chattahoochee, and Flint (ACF) Rivers and how much is used do not have simple answers. The answers depend on the location in the river basin and on the year and season (as discussed on the first two pages of this fact sheet). Location is important because as one moves from upstream to downstream in a typical river, additions to streamflow from tr
Authors
Mark N. Landers, Jaime A. Painter
Surface-Water Conditions in Georgia, Water Year 2005
INTRODUCTION
The U.S. Geological Survey (USGS) Georgia Water Science Center-in cooperation with Federal, State, and local agencies-collected surface-water streamflow, water-quality, and ecological data during the 2005 Water Year (October 1, 2004-September 30, 2005). These data were compiled into layers of an interactive ArcReaderTM published map document (pmf). ArcReaderTM is a product of Envir
Authors
Jaime A. Painter, Mark N. Landers
Does land use affect our streams? A watershed example from Gwinnett County, Georgia, 1998–2001
No abstract available.
Authors
Mark N. Landers, Paul D. Ankcorn, Keith W. McFadden, M. Brian Gregory
Tagging and tracking
No abstract available.
Authors
Mark N. Landers, A. Westgate, Robert K. Bonde, M.J. Murray
Surface-Water Data, Georgia, Water Year 1999
Water resources data for the 1999 water year for Georgia consists of records of stage, discharge, and water quality of streams; and the stage and contents of lakes and reservoirs published in one volume in a digital format on a CD-ROM. This volume contains discharge records of 121 gaging stations; stage for 13 gaging stations; stage and contents for 18 lakes and reservoirs; continuous water qualit
Authors
S. Jack Alhadeff, Mark N. Landers, Brian E. McCallum
Bridge-Scour Data Management System user's manual
The Bridge-Scour Data Management System (BSDMS) supports preparation, compilation, and analysis of bridge-scour data. The BSDMS provides interactive storage, retrieval, selection, editing, and display of bridge-scour data sets. Bridge-scour data sets include more than 200 site and measurement attributes of the channel geometry, flow hydraulics, hydrology, sediment, geomorphic-setting, location, an
Authors
Mark N. Landers, David S. Mueller, Gary R. Martin
Scour measurements at bridge sites during 1993 Upper Mississippi River Basin flood
The record flood on the upper Mississippi River basin during the summer of 1993 provided a rare opportunity for collection of data on streambed scour at bridges and for testing of scour data collection equipment under extreme hydraulic conditions. Real-time scour measurements at bridges are categorized into one of three classes according to their objective: inspection measurements, limited-detail
Authors
David S. Mueller, Mark N. Landers, Edward E. Fischer
Brief summary of National Bridge Scour Data Base
This paper briefly summarizes more than 470 measurements of local channel scour at bridge piers from 58 sites in 14 States. Relations between local scour and selected deterministic parameters are illustrated and discussed. Observed scour depths are compared with predicted values from two local scour prediction equations.
Authors
Mark N. Landers, J. Sterling Jones, Roy E. Trent
Real-time data collection of scour at bridges
The record flood on the Mississippi River during the summer of 1993 provided a rare opportunity to collect data on scour of the streambed at bridges and to test data collection equipment under extreme hydraulic conditions. Detailed bathymetric and hydraulic information were collected at two bridges crossing the Mississippi River during the rising limb, near the peak, and during the recession of th
Authors
David S. Mueller, Mark N. Landers
Science and Products
Filter Total Items: 28
Historic Flooding in South Georgia, March 27-April 3, 2009
A primary mission of the U.S. Geological Survey (USGS) is the measurement and documentation of the magnitude and extent of hydrologic hazards, such as floods, droughts, and hurricane storm surge. USGS personnel were deployed for historic widespread flooding that occurred throughout South Georgia from a storm event beginning in the late evening of March 27 and continuing through April 3, 2009. Data
Authors
Brian E. McCallum, Anthony J. Gotvald, Mark N. Landers
Methods to Evaluate Influence of Onsite Septic Wastewater-Treatment Systems on Base Flow in Selected Watersheds in Gwinnett County, Georgia, October 2007
The influence of onsite septic wastewater-treatment systems (OWTS) on base-flow quantity needs to be understood to evaluate consumptive use of surface-water resources by OWTS. If the influence of OWTS on stream base flow can be measured and if the inflow to OWTS is known from water-use data, then water-budget approaches can be used to evaluate consumptive use. This report presents a method to eval
Authors
Mark N. Landers, Paul D. Ankcorn
Watershed Effects on Streamflow Quantity and Quality in Six Watersheds of Gwinnett County, Georgia
Watershed management is critical for the protection and enhancement of streams that provide multiple benefits for Gwinnett County, Georgia, and downstream communities. Successful watershed management requires an understanding of how stream quality is affected by watershed characteristics. The influence of watershed characteristics on stream quality is complex, particularly for the nonpoint sources
Authors
Mark N. Landers, Paul D. Ankcorn, Keith W. McFadden
How Much Water Is in the Apalachicola, Chattahoochee, and Flint Rivers, and How Much Is Used?
Questions of how much water is in the Apalachicola, Chattahoochee, and Flint (ACF) Rivers and how much is used do not have simple answers. The answers depend on the location in the river basin and on the year and season (as discussed on the first two pages of this fact sheet). Location is important because as one moves from upstream to downstream in a typical river, additions to streamflow from tr
Authors
Mark N. Landers, Jaime A. Painter
Surface-Water Conditions in Georgia, Water Year 2005
INTRODUCTION
The U.S. Geological Survey (USGS) Georgia Water Science Center-in cooperation with Federal, State, and local agencies-collected surface-water streamflow, water-quality, and ecological data during the 2005 Water Year (October 1, 2004-September 30, 2005). These data were compiled into layers of an interactive ArcReaderTM published map document (pmf). ArcReaderTM is a product of Envir
Authors
Jaime A. Painter, Mark N. Landers
Does land use affect our streams? A watershed example from Gwinnett County, Georgia, 1998–2001
No abstract available.
Authors
Mark N. Landers, Paul D. Ankcorn, Keith W. McFadden, M. Brian Gregory
Tagging and tracking
No abstract available.
Authors
Mark N. Landers, A. Westgate, Robert K. Bonde, M.J. Murray
Surface-Water Data, Georgia, Water Year 1999
Water resources data for the 1999 water year for Georgia consists of records of stage, discharge, and water quality of streams; and the stage and contents of lakes and reservoirs published in one volume in a digital format on a CD-ROM. This volume contains discharge records of 121 gaging stations; stage for 13 gaging stations; stage and contents for 18 lakes and reservoirs; continuous water qualit
Authors
S. Jack Alhadeff, Mark N. Landers, Brian E. McCallum
Bridge-Scour Data Management System user's manual
The Bridge-Scour Data Management System (BSDMS) supports preparation, compilation, and analysis of bridge-scour data. The BSDMS provides interactive storage, retrieval, selection, editing, and display of bridge-scour data sets. Bridge-scour data sets include more than 200 site and measurement attributes of the channel geometry, flow hydraulics, hydrology, sediment, geomorphic-setting, location, an
Authors
Mark N. Landers, David S. Mueller, Gary R. Martin
Scour measurements at bridge sites during 1993 Upper Mississippi River Basin flood
The record flood on the upper Mississippi River basin during the summer of 1993 provided a rare opportunity for collection of data on streambed scour at bridges and for testing of scour data collection equipment under extreme hydraulic conditions. Real-time scour measurements at bridges are categorized into one of three classes according to their objective: inspection measurements, limited-detail
Authors
David S. Mueller, Mark N. Landers, Edward E. Fischer
Brief summary of National Bridge Scour Data Base
This paper briefly summarizes more than 470 measurements of local channel scour at bridge piers from 58 sites in 14 States. Relations between local scour and selected deterministic parameters are illustrated and discussed. Observed scour depths are compared with predicted values from two local scour prediction equations.
Authors
Mark N. Landers, J. Sterling Jones, Roy E. Trent
Real-time data collection of scour at bridges
The record flood on the Mississippi River during the summer of 1993 provided a rare opportunity to collect data on scour of the streambed at bridges and to test data collection equipment under extreme hydraulic conditions. Detailed bathymetric and hydraulic information were collected at two bridges crossing the Mississippi River during the rising limb, near the peak, and during the recession of th
Authors
David S. Mueller, Mark N. Landers