Matthew K Landon
Matthew Landon has been a Hydrologist with the U.S. Geological Survey since 1990.
He received a M.S. in Geology from the University of Minnesota in 1993 and a B.S. in Geology from the University of Kansas in 1987. He has conducted studies of groundwater hydrology and geochemistry in Minnesota, Nebraska, California, and Southeast Asia. He has been with the USGS California Water Science Center in San Diego since 2005, serving as Program Chief for the Groundwater and Geochemistry Projects Group from 2012-2016 and the California Oil, Gas, and Groundwater Projects Group since 2016.
Science and Products
Filter Total Items: 91
Comparison of instream methods for measuring hydraulic conductivity in sandy streambeds
Streambed hydraulic conductivity (K) values were determined at seven stream transects in the Platte River Basin in Nebraska using different instream measurement techniques. Values were compared to determine the most appropriate technique(s) for use in sandy streambeds. Values of K determined from field falling‐ and constant‐head permeameter tests analyzed using the Darcy equation...
Authors
M.K. Landon, D.L. Rus, Harvey F. Edwin
Effects of topography and soil properties on recharge at two sites in an agricultural field
Field experiments were conducted from 1992 to 1995 to estimate ground water recharge rates at two sites located within a 2.7-hectare agricultural field. The field lies in a sand plain setting in central Minnesota and is cropped continuously in field corn. The sites are located at a topographically high (upland) site and a topographically low (lowland) site in an effort to quantify the...
Authors
G. N. Delin, R. W. Healy, M.K. Landon, J.K. Böhlke
Relation of pathways and transit times of recharge water to nitrate concentrations using stable isotopes
Oxygen and hydrogen stable isotope values of precipitation, irrigation water, soil water, and ground water were used with soil-moisture contents and water levels to estimate transit times and pathways of recharge water in the unsaturated zone of a sand and gravel aquifer. Nitrate-nitrogen (nitrate) concentrations in ground water were also measured to assess their relation to seasonal...
Authors
M.K. Landon, G. N. Delin, S.C. Komor, C.P. Regan
Effects of ground-water withdrawals on the Rock River and associated valley aquifer, eastern Rock County, Minnesota
A better understanding of the ground-water and surface-water resources of the Rock River Valley in southwestern Minnesota was needed due to concerns surrounding future reliable sources of water for public supply. The Rock River Valley aquifer consists of a surficial sand and gravel unit that underlies the entire Rock River Valley and a buried sand and gravel unit that is present only in...
Authors
Richard J. Lindgren, M.K. Landon
Comparison of the stable-isotopic composition of soil water collected from suction lysimeters, wick samplers, and cores in a sandy unsaturated zone
Soil water collected from suction lysimeters and wick samplers buried in the unsaturated zone of a sand and gravel aquifer and extracted from soil cores were analyzed for stable oxygen and hydrogen isotope values. Soil water isotopic values differed among the three sampling methods in most cases. However, because each sampling method collected different fractions of the total soil-water...
Authors
M.K. Landon, G. N. Delin, S.C. Komor, C.P. Regan
Effects of farming systems on ground-water quality at the management systems evaluation area near Princeton, Minnesota, 1991-95
Ground-water quality in an unconfined sand and gravel aquifer was monitored during 1991-95 at the Minnesota Management Systems Evaluation Area (MSEA) near Princeton, Minnesota. The objectives of the study were to: (1) describe the effects of three farming systems on groundwater quality, and (2) evaluate the factors affecting ground-water quality and transport of agricultural chemicals at...
Authors
M.K. Landon, G. N. Delin, J.A. Lamb, J. L. Anderson, R.H. Dowdy
Water-quality and hydrogeologic data used to evaluate the effects of farming systems on ground-water quality at the Management Systems Evaluation Area near Princeton, Minnesota, 1991-95
The Minnesota Management Systems Evaluation Area (MSEA) project was part of a multi-scale, inter-agency initiative to evaluate the effects of agricultural management systems on water quality in the midwest corn belt. The research area was located in the Anoka Sand Plain about 5 kilometers southwest of Princeton, Minnesota. The ground-water-quality monitoring network within and...
Authors
M.K. Landon, G. N. Delin, K.J. Nelson, C.P. Regan, J.A. Lamb, S.J. Larson, P. D. Capel, J. L. Anderson, R.H. Dowdy
Hydrogeologic and water-quality data used to evaluate the effects of focused recharge on ground-water quality near Princeton, Minnesota, 1991-95
This study was part of the Management Systems Evaluation Area (MSEA) Program, a multi-scale, inter-agency initiative to evaluate the effects of agricultural systems on water quality in the midwest corn belt. The research was part of the U.S. Geological Survey Toxics Substances Hydrology Program. The research area was located in the Anoka Sand Plain about 5 kilometers southwest of...
Authors
G. N. Delin, M.K. Landon, K.J. Nelson, R. B. Wanty, R. W. Healy, H.W. Olson, J.K. Böhlke, B. R. Schroyer, P. D. Capel
Multiport well design for sampling of ground water at closely spaced vertical intervals
Detailed vertical sampling is useful in aquifers where vertical mixing is limited and steep vertical gradients in chemical concentrations are expected. Samples can be collected at closely spaced vertical intervals from nested wells with short screened intervals. However, this approach may not be appropriate in all situations. An easy-to-construct and easy-to-install multiport sampling...
Authors
G. N. Delin, M.K. Landon
Effects of 1992 farming systems on ground-water quality at the management systems evaluation area near Princeton, Minnesota
The Management Systems Evaluation Area (MSEA) program was a multiscale, interagency initiative to evaluate the effects of agricultural systems on water quality in the midwest corn belt. The primary objective of the Minnesota MSEA was to evaluate the effects of ridge-tillage practices in a corn and soybean farming system on ground-water quality. The 65-hectare Minnesota MSEA was located...
Authors
G. N. Delin, M.K. Landon, J.A. Lamb, R.H. Dowdy
Ground-water quality in agricultural areas, Anoka Sand Plain Aquifer, east-central Minnesota, 1984-90
Ground-water quality in the Anoka Sand Plain aquifer was studied as part of the multiscale Management Systems Evaluation Area (MSEA) study by collecting water samples from shallow wells during August through November 1990. The sampling was conducted to: (1) aid in selection of the MSEA research area; (2) facilitate comparison of results at the MSEA research area to the regional scale...
Authors
M.K. Landon, G. N. Delin
Hydrogeologic and water-quality data used to characterize the Management Systems Evaluation Area near Princeton, Minnesota, 1991
The Minnesota Management Systems Evaluation Area project is part of a multi-scale, inter-agency initiative to evaluate the effects of agricultural management systems on water quality in the midwest corn belt. The research area is located in the Anoka Sand Plain about 5 kilometers southwest of Princeton, Minnesota. The ground-water-quality monitoring network within and immediately...
Authors
G. N. Delin, M.K. Landon, J.A. Lamb, J. L. Anderson
Science and Products
Filter Total Items: 91
Comparison of instream methods for measuring hydraulic conductivity in sandy streambeds
Streambed hydraulic conductivity (K) values were determined at seven stream transects in the Platte River Basin in Nebraska using different instream measurement techniques. Values were compared to determine the most appropriate technique(s) for use in sandy streambeds. Values of K determined from field falling‐ and constant‐head permeameter tests analyzed using the Darcy equation...
Authors
M.K. Landon, D.L. Rus, Harvey F. Edwin
Effects of topography and soil properties on recharge at two sites in an agricultural field
Field experiments were conducted from 1992 to 1995 to estimate ground water recharge rates at two sites located within a 2.7-hectare agricultural field. The field lies in a sand plain setting in central Minnesota and is cropped continuously in field corn. The sites are located at a topographically high (upland) site and a topographically low (lowland) site in an effort to quantify the...
Authors
G. N. Delin, R. W. Healy, M.K. Landon, J.K. Böhlke
Relation of pathways and transit times of recharge water to nitrate concentrations using stable isotopes
Oxygen and hydrogen stable isotope values of precipitation, irrigation water, soil water, and ground water were used with soil-moisture contents and water levels to estimate transit times and pathways of recharge water in the unsaturated zone of a sand and gravel aquifer. Nitrate-nitrogen (nitrate) concentrations in ground water were also measured to assess their relation to seasonal...
Authors
M.K. Landon, G. N. Delin, S.C. Komor, C.P. Regan
Effects of ground-water withdrawals on the Rock River and associated valley aquifer, eastern Rock County, Minnesota
A better understanding of the ground-water and surface-water resources of the Rock River Valley in southwestern Minnesota was needed due to concerns surrounding future reliable sources of water for public supply. The Rock River Valley aquifer consists of a surficial sand and gravel unit that underlies the entire Rock River Valley and a buried sand and gravel unit that is present only in...
Authors
Richard J. Lindgren, M.K. Landon
Comparison of the stable-isotopic composition of soil water collected from suction lysimeters, wick samplers, and cores in a sandy unsaturated zone
Soil water collected from suction lysimeters and wick samplers buried in the unsaturated zone of a sand and gravel aquifer and extracted from soil cores were analyzed for stable oxygen and hydrogen isotope values. Soil water isotopic values differed among the three sampling methods in most cases. However, because each sampling method collected different fractions of the total soil-water...
Authors
M.K. Landon, G. N. Delin, S.C. Komor, C.P. Regan
Effects of farming systems on ground-water quality at the management systems evaluation area near Princeton, Minnesota, 1991-95
Ground-water quality in an unconfined sand and gravel aquifer was monitored during 1991-95 at the Minnesota Management Systems Evaluation Area (MSEA) near Princeton, Minnesota. The objectives of the study were to: (1) describe the effects of three farming systems on groundwater quality, and (2) evaluate the factors affecting ground-water quality and transport of agricultural chemicals at...
Authors
M.K. Landon, G. N. Delin, J.A. Lamb, J. L. Anderson, R.H. Dowdy
Water-quality and hydrogeologic data used to evaluate the effects of farming systems on ground-water quality at the Management Systems Evaluation Area near Princeton, Minnesota, 1991-95
The Minnesota Management Systems Evaluation Area (MSEA) project was part of a multi-scale, inter-agency initiative to evaluate the effects of agricultural management systems on water quality in the midwest corn belt. The research area was located in the Anoka Sand Plain about 5 kilometers southwest of Princeton, Minnesota. The ground-water-quality monitoring network within and...
Authors
M.K. Landon, G. N. Delin, K.J. Nelson, C.P. Regan, J.A. Lamb, S.J. Larson, P. D. Capel, J. L. Anderson, R.H. Dowdy
Hydrogeologic and water-quality data used to evaluate the effects of focused recharge on ground-water quality near Princeton, Minnesota, 1991-95
This study was part of the Management Systems Evaluation Area (MSEA) Program, a multi-scale, inter-agency initiative to evaluate the effects of agricultural systems on water quality in the midwest corn belt. The research was part of the U.S. Geological Survey Toxics Substances Hydrology Program. The research area was located in the Anoka Sand Plain about 5 kilometers southwest of...
Authors
G. N. Delin, M.K. Landon, K.J. Nelson, R. B. Wanty, R. W. Healy, H.W. Olson, J.K. Böhlke, B. R. Schroyer, P. D. Capel
Multiport well design for sampling of ground water at closely spaced vertical intervals
Detailed vertical sampling is useful in aquifers where vertical mixing is limited and steep vertical gradients in chemical concentrations are expected. Samples can be collected at closely spaced vertical intervals from nested wells with short screened intervals. However, this approach may not be appropriate in all situations. An easy-to-construct and easy-to-install multiport sampling...
Authors
G. N. Delin, M.K. Landon
Effects of 1992 farming systems on ground-water quality at the management systems evaluation area near Princeton, Minnesota
The Management Systems Evaluation Area (MSEA) program was a multiscale, interagency initiative to evaluate the effects of agricultural systems on water quality in the midwest corn belt. The primary objective of the Minnesota MSEA was to evaluate the effects of ridge-tillage practices in a corn and soybean farming system on ground-water quality. The 65-hectare Minnesota MSEA was located...
Authors
G. N. Delin, M.K. Landon, J.A. Lamb, R.H. Dowdy
Ground-water quality in agricultural areas, Anoka Sand Plain Aquifer, east-central Minnesota, 1984-90
Ground-water quality in the Anoka Sand Plain aquifer was studied as part of the multiscale Management Systems Evaluation Area (MSEA) study by collecting water samples from shallow wells during August through November 1990. The sampling was conducted to: (1) aid in selection of the MSEA research area; (2) facilitate comparison of results at the MSEA research area to the regional scale...
Authors
M.K. Landon, G. N. Delin
Hydrogeologic and water-quality data used to characterize the Management Systems Evaluation Area near Princeton, Minnesota, 1991
The Minnesota Management Systems Evaluation Area project is part of a multi-scale, inter-agency initiative to evaluate the effects of agricultural management systems on water quality in the midwest corn belt. The research area is located in the Anoka Sand Plain about 5 kilometers southwest of Princeton, Minnesota. The ground-water-quality monitoring network within and immediately...
Authors
G. N. Delin, M.K. Landon, J.A. Lamb, J. L. Anderson