Michael E Wieczorek
Michael Wieczorek is a Geographer/GIS specialist for the Water Mission Area's Data Driven Drought Prediction Program and the National Hydrologic Geospatial Fabric Team.
Michael Wieczorek holds a B.S. in Geography from Towson State University (1991). He joined the U.S. Geological survey in 1992 as a GIS specialist for the National Water Quality Program working in that capacity to 2016. He is currently a GIS specialist for the Water Mission Area's Data Driven Drought Prediction Program and the National Hydrologic Geospatial Fabric Team.
Professional Experience
During his 28 year USGS career, Mike has provided GIS technical support applying his spatial skills to projects ranging in scale from local water-quality studies to landscape characterization for national-scale analysis and modeling.
Education and Certifications
M.S. Program in Geography (attended), University of Wisconsin at Milwaukee, 1992-1993
M.S. Program in Geography (attended), Watershed Analysis and Spatial Analysis, University of Nebraska-Lincoln
B.S. in Geography and History, Towson University, 1991
Science and Products
Filter Total Items: 26
30 Year (1990 - 2019) Annual Average Difference between Precipitation Potential Evapotranspiration 30 Year (1990 - 2019) Annual Average Difference between Precipitation Potential Evapotranspiration
This metadata record describes the 30 year (1990-2019) annual average difference between precipitation potential evapotranspiration in millimeters in geotiff format. The source data is based on the ClimGrid netcdf data for precipitation and temperature (Wieczorek and others, 2022). Units are millimeters.
30-Year (1990-2019) Annual Average of DAYMET Precipitation and Temperature for North America 30-Year (1990-2019) Annual Average of DAYMET Precipitation and Temperature for North America
This metadata record describes the 30-year annual average of precipitation in millimeters (mm) and temperature (Celsius) during the period 1990–2019 for North America. The source data were produced by and acquired from DAYMET daily climate data (2020) and presented here as a series of two 1-kilometer resolution GeoTIFF files. An open source python code file used to process the data is...
U.S. Streamflow Drought During the Last Century: annual drought and low flow metrics, annual climate, and trends for the periods 1921-, 1951- and 1981-2020 (ver. 1.1, August 2025) U.S. Streamflow Drought During the Last Century: annual drought and low flow metrics, annual climate, and trends for the periods 1921-, 1951- and 1981-2020 (ver. 1.1, August 2025)
This dataset contains annual flow metrics quantifying drought and low streamflows for USGS GAGES-2 gages in the contiguous U.S. satisfying data completeness checks for the periods 1921-2020, 1951-2020, and 1981-2020. The dataset also contains annual climate variables from the USGS Monthly Water Balance Model (MWBM). The dataset provides trend analysis outputs for annual drought and low...
USGS monthly water balance model inputs and outputs for the conterminous United States, 1895-2020, based on ClimGrid data USGS monthly water balance model inputs and outputs for the conterminous United States, 1895-2020, based on ClimGrid data
This NetCDF represents the monthly inputs and outputs from a United States Geological Survey water-balance model (McCabe and Wolock, 2011) for the conterminous United States for the period 1895-01-01 to 2020-12-31. The source data used to run the water balance model is based on the National Oceanic and Atmospheric Administration's(NOAA, 2020) ClimGrid data for precipitation and...
Clusters of monthly streamflow values with similar temporal patterns at 555 HCDN sites for the period 1981 to 2019 Clusters of monthly streamflow values with similar temporal patterns at 555 HCDN sites for the period 1981 to 2019
This data release identifies 555 Hydro-Climatic Data Network (HCDN) streamgages in the conterminous United States during the period 1981-2019 which were grouped according to similarity in their temporal patterns of monthly streamflow.
Geospatial Fabric for National Hydrologic Modeling, version 1.1 Geospatial Fabric for National Hydrologic Modeling, version 1.1
This U.S. Geological Survey (USGS) data release consists of two hydrographic datasets with spatial modeling units consistent with the National Hydrologic Model (NHM) Geospatial Fabric for National Hydrologic Modeling (abbreviated within this document as GFv1, Viger and Bock, 2014). The two datasets found as subpages to this landing page are 1) the GIS (geographic information system)...
Michael Weiczorek has written or contributed to many publications for the USGS. The contents here represent some of his work.
Filter Total Items: 13
An increase in the slope of the concentration-discharge relation for total organic carbon in major rivers in New England, 1973 to 2019 An increase in the slope of the concentration-discharge relation for total organic carbon in major rivers in New England, 1973 to 2019
The mobilization and transport of organic carbon (OC) in rivers and delivery to the near-coastal ocean are important processes in the carbon cycle that are affected by both climate and anthropogenic activities. Riverine OC transport can affect carbon sequestration, contaminant transport, ocean acidification, the formation of toxic disinfection by-products, ocean temperature and...
Authors
Thomas G. Huntington, Michael Wieczorek
Mainstems: A logical data model implementing mainstem and drainage basin feature types based on WaterML2 Part 3: HY Features concepts Mainstems: A logical data model implementing mainstem and drainage basin feature types based on WaterML2 Part 3: HY Features concepts
The Mainstems data model implements the catchment and flowpath concepts from WaterML2 Part 3: Surface Hydrology Features (HY_Features) for persistent, cross-scale, identification of hydrologic features. The data model itself provides a focused and lightweight method to describe hydrologic networks with minimum but sufficient information. The design is intended to provide a model for data
Authors
David L. Blodgett, J. Micheal Johnson, Mark Sondheim, Michael Wieczorek, Nels Frazier
An enhanced hydrologic stream network based on the NHDPlus medium resolution dataset An enhanced hydrologic stream network based on the NHDPlus medium resolution dataset
The National Hydrography Dataset Plus, Version 2.1 (NHDPlusV2.1) is an attribute-rich digital stream network for the conterminous United States, serving as a foundational infrastructure for reporting hydrologic information at both regional and national scales. SPAtially Referenced Regressions On Watershed attributes (SPARROW) is a process-based statistical model that relies on a digital...
Authors
John W. Brakebill, Gregory E. Schwarz, Michael E. Wieczorek
Prediction and inference of flow-duration curves using multi-output neural networks Prediction and inference of flow-duration curves using multi-output neural networks
We develop multi-output neural network models (MNNs) to predict flow-duration curves (FDCs) in 9,203 ungaged locations in the Southeastern United States for six decades between 1950-2009. The model architecture contains multiple response variables in the output layer that correspond to individual quantiles along the FDC. During training, predictions are made for each quantile, and a...
Authors
Scott C. Worland, Scott Steinschneider, William H. Asquith, Rodney Knight, Michael E. Wieczorek
A database of natural monthly streamflow estimates from 1950 to 2015 for the conterminous United States A database of natural monthly streamflow estimates from 1950 to 2015 for the conterminous United States
Quantifying and understanding the natural streamflow regime, defined as expected streamflow that would occur in the absence of anthropogenic modification to the hydrologic system, is critically important for the development of management strategies aimed at protecting aquatic ecosystems. Water balance models have been applied frequently to estimate natural flows, but are limited in the...
Authors
Matthew P. Miller, Daren M. Carlisle, David M. Wolock, Michael Wieczorek
High nitrate concentrations in some Midwest United States streams in 2013 after the 2012 drought High nitrate concentrations in some Midwest United States streams in 2013 after the 2012 drought
Nitrogen sources in the Mississippi River basin have been linked to degradation of stream ecology and to Gulf of Mexico hypoxia. In 2013, the USGS and the USEPA characterized water quality stressors and ecological conditions in 100 wadeable streams across the midwestern United States. Wet conditions in 2013 followed a severe drought in 2012, a weather pattern associated with elevated...
Authors
Peter C. Van Metre, Jeffrey W. Frey, MaryLynn Musgrove, Naomi Nakagaki, Sharon L. Qi, Barbara Mahler, Michael E. Wieczorek, Daniel T. Button
Science and Products
Filter Total Items: 26
30 Year (1990 - 2019) Annual Average Difference between Precipitation Potential Evapotranspiration 30 Year (1990 - 2019) Annual Average Difference between Precipitation Potential Evapotranspiration
This metadata record describes the 30 year (1990-2019) annual average difference between precipitation potential evapotranspiration in millimeters in geotiff format. The source data is based on the ClimGrid netcdf data for precipitation and temperature (Wieczorek and others, 2022). Units are millimeters.
30-Year (1990-2019) Annual Average of DAYMET Precipitation and Temperature for North America 30-Year (1990-2019) Annual Average of DAYMET Precipitation and Temperature for North America
This metadata record describes the 30-year annual average of precipitation in millimeters (mm) and temperature (Celsius) during the period 1990–2019 for North America. The source data were produced by and acquired from DAYMET daily climate data (2020) and presented here as a series of two 1-kilometer resolution GeoTIFF files. An open source python code file used to process the data is...
U.S. Streamflow Drought During the Last Century: annual drought and low flow metrics, annual climate, and trends for the periods 1921-, 1951- and 1981-2020 (ver. 1.1, August 2025) U.S. Streamflow Drought During the Last Century: annual drought and low flow metrics, annual climate, and trends for the periods 1921-, 1951- and 1981-2020 (ver. 1.1, August 2025)
This dataset contains annual flow metrics quantifying drought and low streamflows for USGS GAGES-2 gages in the contiguous U.S. satisfying data completeness checks for the periods 1921-2020, 1951-2020, and 1981-2020. The dataset also contains annual climate variables from the USGS Monthly Water Balance Model (MWBM). The dataset provides trend analysis outputs for annual drought and low...
USGS monthly water balance model inputs and outputs for the conterminous United States, 1895-2020, based on ClimGrid data USGS monthly water balance model inputs and outputs for the conterminous United States, 1895-2020, based on ClimGrid data
This NetCDF represents the monthly inputs and outputs from a United States Geological Survey water-balance model (McCabe and Wolock, 2011) for the conterminous United States for the period 1895-01-01 to 2020-12-31. The source data used to run the water balance model is based on the National Oceanic and Atmospheric Administration's(NOAA, 2020) ClimGrid data for precipitation and...
Clusters of monthly streamflow values with similar temporal patterns at 555 HCDN sites for the period 1981 to 2019 Clusters of monthly streamflow values with similar temporal patterns at 555 HCDN sites for the period 1981 to 2019
This data release identifies 555 Hydro-Climatic Data Network (HCDN) streamgages in the conterminous United States during the period 1981-2019 which were grouped according to similarity in their temporal patterns of monthly streamflow.
Geospatial Fabric for National Hydrologic Modeling, version 1.1 Geospatial Fabric for National Hydrologic Modeling, version 1.1
This U.S. Geological Survey (USGS) data release consists of two hydrographic datasets with spatial modeling units consistent with the National Hydrologic Model (NHM) Geospatial Fabric for National Hydrologic Modeling (abbreviated within this document as GFv1, Viger and Bock, 2014). The two datasets found as subpages to this landing page are 1) the GIS (geographic information system)...
Michael Weiczorek has written or contributed to many publications for the USGS. The contents here represent some of his work.
Filter Total Items: 13
An increase in the slope of the concentration-discharge relation for total organic carbon in major rivers in New England, 1973 to 2019 An increase in the slope of the concentration-discharge relation for total organic carbon in major rivers in New England, 1973 to 2019
The mobilization and transport of organic carbon (OC) in rivers and delivery to the near-coastal ocean are important processes in the carbon cycle that are affected by both climate and anthropogenic activities. Riverine OC transport can affect carbon sequestration, contaminant transport, ocean acidification, the formation of toxic disinfection by-products, ocean temperature and...
Authors
Thomas G. Huntington, Michael Wieczorek
Mainstems: A logical data model implementing mainstem and drainage basin feature types based on WaterML2 Part 3: HY Features concepts Mainstems: A logical data model implementing mainstem and drainage basin feature types based on WaterML2 Part 3: HY Features concepts
The Mainstems data model implements the catchment and flowpath concepts from WaterML2 Part 3: Surface Hydrology Features (HY_Features) for persistent, cross-scale, identification of hydrologic features. The data model itself provides a focused and lightweight method to describe hydrologic networks with minimum but sufficient information. The design is intended to provide a model for data
Authors
David L. Blodgett, J. Micheal Johnson, Mark Sondheim, Michael Wieczorek, Nels Frazier
An enhanced hydrologic stream network based on the NHDPlus medium resolution dataset An enhanced hydrologic stream network based on the NHDPlus medium resolution dataset
The National Hydrography Dataset Plus, Version 2.1 (NHDPlusV2.1) is an attribute-rich digital stream network for the conterminous United States, serving as a foundational infrastructure for reporting hydrologic information at both regional and national scales. SPAtially Referenced Regressions On Watershed attributes (SPARROW) is a process-based statistical model that relies on a digital...
Authors
John W. Brakebill, Gregory E. Schwarz, Michael E. Wieczorek
Prediction and inference of flow-duration curves using multi-output neural networks Prediction and inference of flow-duration curves using multi-output neural networks
We develop multi-output neural network models (MNNs) to predict flow-duration curves (FDCs) in 9,203 ungaged locations in the Southeastern United States for six decades between 1950-2009. The model architecture contains multiple response variables in the output layer that correspond to individual quantiles along the FDC. During training, predictions are made for each quantile, and a...
Authors
Scott C. Worland, Scott Steinschneider, William H. Asquith, Rodney Knight, Michael E. Wieczorek
A database of natural monthly streamflow estimates from 1950 to 2015 for the conterminous United States A database of natural monthly streamflow estimates from 1950 to 2015 for the conterminous United States
Quantifying and understanding the natural streamflow regime, defined as expected streamflow that would occur in the absence of anthropogenic modification to the hydrologic system, is critically important for the development of management strategies aimed at protecting aquatic ecosystems. Water balance models have been applied frequently to estimate natural flows, but are limited in the...
Authors
Matthew P. Miller, Daren M. Carlisle, David M. Wolock, Michael Wieczorek
High nitrate concentrations in some Midwest United States streams in 2013 after the 2012 drought High nitrate concentrations in some Midwest United States streams in 2013 after the 2012 drought
Nitrogen sources in the Mississippi River basin have been linked to degradation of stream ecology and to Gulf of Mexico hypoxia. In 2013, the USGS and the USEPA characterized water quality stressors and ecological conditions in 100 wadeable streams across the midwestern United States. Wet conditions in 2013 followed a severe drought in 2012, a weather pattern associated with elevated...
Authors
Peter C. Van Metre, Jeffrey W. Frey, MaryLynn Musgrove, Naomi Nakagaki, Sharon L. Qi, Barbara Mahler, Michael E. Wieczorek, Daniel T. Button