Gabriel B Senay, Ph.D.
Gabriel Senay is a scientist with the U.S. Geological Survey Earth Resources Observation and Science (EROS) Center, co-located with the North Central Climate Adaptation Science Center (NC CASC) in Boulder, Colorado. He is also an adjunct professor at South Dakota State University and a Faculty Affiliate with Colorado State University, Fort Collins, Colorado.
Senay, with a background in agricultural engineering, hydrology, and remote sensing, conducts applied research on landscape water use assessment and monitoring using satellite-derived data and hydrologic modeling. He has taught courses on remote sensing of water resources and land surveying.
Research topics include:
1) Evapotranspiration modeling for crop water use mapping, drought monitoring, and water budget studies.
2) Runoff and soil moisture modeling for groundwater recharge estimation, small reservoir (pond) monitoring, and ecological drought assessment.
3) Interactions between land cover change and hydrology and their impact on water resources.
4) Spatiotemporal dynamics and trend analyses of agro-hydrologic processes and climatic drivers.
Education and Certifications
Licensed professional engineer (PE) in Civil Engineering (Water Resources)
PhD from The Ohio State University, USA.
MSc in Hydrology from Wageningen University, The Netherlands
BSc in Agricultural Engineering from Alemaya University, Ethiopia
Science and Products
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Multisensor earth observations to characterize wetlands and malaria epidemiology in Ethiopia
Malaria is a major global public health problem, particularly in Sub-Saharan Africa. The spatial heterogeneity of malaria can be affected by factors such as hydrological processes, physiography, and land cover patterns. Tropical wetlands, for example, are important hydrological features that can serve as mosquito breeding habitats. Mapping and monitoring of wetlands using satellite remote sensing
Authors
Alemayehu Midekisa, Gabriel Senay, Michael C. Wimberly
On the downscaling of actual evapotranspiration maps based on combination of MODIS and landsat-based actual evapotranspiration estimates
Downscaling is one of the important ways of utilizing the combined benefits of the high temporal resolution of Moderate Resolution Imaging Spectroradiometer (MODIS) images and fine spatial resolution of Landsat images. We have evaluated the output regression with intercept method and developed the Linear with Zero Intercept (LinZI) method for downscaling MODIS-based monthly actual evapotranspirat
Authors
Ramesh K. Singh, Gabriel B. Senay, Naga Manohar Velpuri, Stefanie Bohms, James P. Verdin
Understanding the hydrologic sources and sinks in the Nile Basin using multisource climate and remote sensing data sets
In this study, we integrated satellite-drived precipitation and modeled evapotranspiration data (2000–2012) to describe spatial variability of hydrologic sources and sinks in the Nile Basin. Over 2000–2012 period, 4 out of 11 countries (Ethiopia, Tanzania, Kenya, and Uganda) in the Nile Basin showed a positive water balance while three downstream countries (South Sudan, Sudan, and Egypt) showed a
Authors
Gabriel Senay, Naga Manohar Velpuri, Stefanie Bohms, Yonas Demissie, Mekonnen Gebremichael
Hydroclimate of the Spring Mountains and Sheep Range, Clark County, Nevada
Precipitation, potential evapotranspiration, and actual evapotranspiration often are used to characterize the hydroclimate of a region. Quantification of these parameters in mountainous terrains is difficult because limited access often hampers the collection of representative ground data. To fulfill a need to characterize ecological zones in the Spring Mountains and Sheep Range of southern Nevada
Authors
Michael T. Moreo, Gabriel B. Senay, Alan L. Flint, Nancy A. Damar, Randell J. Laczniak, James Hurja
Africa-wide monitoring of small surface water bodies using multisource satellite data: A monitoring system for FEWS NET
Continental Africa has the highest volume of water stored in wetlands, large lakes, reservoirs, and rivers, yet it suffers from problems such as water availability and access. With climate change intensifying the hydrologic cycle and altering the distribution and frequency of rainfall, the problem of water availability and access will increase further. Famine Early Warning Systems Network (FEWS NE
Authors
Naga Manohar Velpuri, Gabriel B. Senay, James Rowland, James P. Verdin, Henok Alemu
Earth observation based assessment of the water production and water consumption of Nile Basin agro-ecosystems
The increasing competition for water resources requires a better understanding of flows, fluxes, stocks, and the services and benefits related to water consumption. This paper explains how public domain Earth Observation data based on Moderate Resolution Imaging Spectroradiometer (MODIS), Second Generation Meteosat (MSG), Tropical Rainfall Measurement Mission (TRMM) and various altimeter measureme
Authors
Wim G.M. Bastiaanssen, Poolad Karimi, Lisa-Maria Rebelo, Zheng Duan, Gabriel Senay, Lal Muthuwatte, Vladimir Smakhtin
Evapotranspiration variability and its association with vegetation dynamics in the Nile Basin, 2002–2011
Evapotranspiration (ET) is a vital component in land-atmosphere interactions. In drylands, over 90% of annual rainfall evaporates. The Nile Basin in Africa is about 42% dryland in a region experiencing rapid population growth and development. The relationship of ET with climate, vegetation and land cover in the basin during 2002–2011 is analyzed using thermal-based Simplified Surface Energy Balanc
Authors
Henok Alemu, Gabriel B. Senay, Armel T. Kaptue, Valeriy Kovalskyy
Actual evapotranspiration (water use) assessment of the Colorado River Basin at the Landsat resolution using the operational simplified surface energy balance model
Accurately estimating consumptive water use in the Colorado River Basin (CRB) is important for assessing and managing limited water resources in the basin. Increasing water demand from various sectors may threaten long-term sustainability of the water supply in the arid southwestern United States. We have developed a first-ever basin-wide actual evapotranspiration (ETa) map of the CRB at the Lands
Authors
Ramesh K. Singh, Gabriel B. Senay, Naga Manohar Velpuri, Stefanie Bohms, Scott Russell L, James P. Verdin
Geodatabase compilation of hydrogeologic, remote sensing, and water-budget-component data for the High Plains aquifer, 2011
The High Plains aquifer underlies almost 112 million acres in the central United States. It is one of the largest aquifers in the Nation in terms of annual groundwater withdrawals and provides drinking water for 2.3 million people. The High Plains aquifer has gained national and international attention as a highly stressed groundwater supply primarily because it has been appreciably depleted in so
Authors
Natalie A. Houston, Sophia L. Gonzales-Bradford, Amanda T. Flynn, Sharon L. Qi, Steven M. Peterson, Jennifer S. Stanton, Derek W. Ryter, Terry L. Sohl, Gabriel B. Senay
A comprehensive evaluation of two MODIS evapotranspiration products over the conterminous United States: using point and gridded FLUXNET and water balance ET
Remote sensing datasets are increasingly being used to provide spatially explicit large scale evapotranspiration (ET) estimates. Extensive evaluation of such large scale estimates is necessary before they can be used in various applications. In this study, two monthly MODIS 1 km ET products, MODIS global ET (MOD16) and Operational Simplified Surface Energy Balance (SSEBop) ET, are validated over t
Authors
Naga M. Velpuri, Gabriel B. Senay, Ramesh K. Singh, Stefanie Bohms, James P. Verdin
Analysis of long-term trends (1950–2009) in precipitation, runoff and runoff coefficient in major urban watersheds in the United States
This study investigates the long-term trends in precipitation, runoff and runoff coefficient in major urban watersheds in the United States. The seasonal Mann–Kendall trend test was performed on monthly precipitation, runoff and runoff coefficient data from 1950 to 2009 obtained from 62 urban watersheds covering 21 major urban centers in the United States. The results indicate that only five out o
Authors
N.M. Velpuri, G.B. Senay
Actual evapotranspiration modeling using the operational Simplified Surface Energy Balance (SSEBop) approach
Remote-sensing technology and surface-energy-balance methods can provide accurate and repeatable estimates of actual evapotranspiration (ETa) when used in combination with local weather datasets over irrigated lands. Estimates of ETa may be used to provide a consistent, accurate, and efficient approach for estimating regional water withdrawals for irrigation and associated consumptive use (CU), es
Authors
Mark E. Savoca, Gabriel B. Senay, Molly A. Maupin, Joan F. Kenny, Charles A. Perry
Filter Total Items: 14
Science and Products
Filter Total Items: 32
No Result Found
Filter Total Items: 106
Multisensor earth observations to characterize wetlands and malaria epidemiology in Ethiopia
Malaria is a major global public health problem, particularly in Sub-Saharan Africa. The spatial heterogeneity of malaria can be affected by factors such as hydrological processes, physiography, and land cover patterns. Tropical wetlands, for example, are important hydrological features that can serve as mosquito breeding habitats. Mapping and monitoring of wetlands using satellite remote sensing
Authors
Alemayehu Midekisa, Gabriel Senay, Michael C. Wimberly
On the downscaling of actual evapotranspiration maps based on combination of MODIS and landsat-based actual evapotranspiration estimates
Downscaling is one of the important ways of utilizing the combined benefits of the high temporal resolution of Moderate Resolution Imaging Spectroradiometer (MODIS) images and fine spatial resolution of Landsat images. We have evaluated the output regression with intercept method and developed the Linear with Zero Intercept (LinZI) method for downscaling MODIS-based monthly actual evapotranspirat
Authors
Ramesh K. Singh, Gabriel B. Senay, Naga Manohar Velpuri, Stefanie Bohms, James P. Verdin
Understanding the hydrologic sources and sinks in the Nile Basin using multisource climate and remote sensing data sets
In this study, we integrated satellite-drived precipitation and modeled evapotranspiration data (2000–2012) to describe spatial variability of hydrologic sources and sinks in the Nile Basin. Over 2000–2012 period, 4 out of 11 countries (Ethiopia, Tanzania, Kenya, and Uganda) in the Nile Basin showed a positive water balance while three downstream countries (South Sudan, Sudan, and Egypt) showed a
Authors
Gabriel Senay, Naga Manohar Velpuri, Stefanie Bohms, Yonas Demissie, Mekonnen Gebremichael
Hydroclimate of the Spring Mountains and Sheep Range, Clark County, Nevada
Precipitation, potential evapotranspiration, and actual evapotranspiration often are used to characterize the hydroclimate of a region. Quantification of these parameters in mountainous terrains is difficult because limited access often hampers the collection of representative ground data. To fulfill a need to characterize ecological zones in the Spring Mountains and Sheep Range of southern Nevada
Authors
Michael T. Moreo, Gabriel B. Senay, Alan L. Flint, Nancy A. Damar, Randell J. Laczniak, James Hurja
Africa-wide monitoring of small surface water bodies using multisource satellite data: A monitoring system for FEWS NET
Continental Africa has the highest volume of water stored in wetlands, large lakes, reservoirs, and rivers, yet it suffers from problems such as water availability and access. With climate change intensifying the hydrologic cycle and altering the distribution and frequency of rainfall, the problem of water availability and access will increase further. Famine Early Warning Systems Network (FEWS NE
Authors
Naga Manohar Velpuri, Gabriel B. Senay, James Rowland, James P. Verdin, Henok Alemu
Earth observation based assessment of the water production and water consumption of Nile Basin agro-ecosystems
The increasing competition for water resources requires a better understanding of flows, fluxes, stocks, and the services and benefits related to water consumption. This paper explains how public domain Earth Observation data based on Moderate Resolution Imaging Spectroradiometer (MODIS), Second Generation Meteosat (MSG), Tropical Rainfall Measurement Mission (TRMM) and various altimeter measureme
Authors
Wim G.M. Bastiaanssen, Poolad Karimi, Lisa-Maria Rebelo, Zheng Duan, Gabriel Senay, Lal Muthuwatte, Vladimir Smakhtin
Evapotranspiration variability and its association with vegetation dynamics in the Nile Basin, 2002–2011
Evapotranspiration (ET) is a vital component in land-atmosphere interactions. In drylands, over 90% of annual rainfall evaporates. The Nile Basin in Africa is about 42% dryland in a region experiencing rapid population growth and development. The relationship of ET with climate, vegetation and land cover in the basin during 2002–2011 is analyzed using thermal-based Simplified Surface Energy Balanc
Authors
Henok Alemu, Gabriel B. Senay, Armel T. Kaptue, Valeriy Kovalskyy
Actual evapotranspiration (water use) assessment of the Colorado River Basin at the Landsat resolution using the operational simplified surface energy balance model
Accurately estimating consumptive water use in the Colorado River Basin (CRB) is important for assessing and managing limited water resources in the basin. Increasing water demand from various sectors may threaten long-term sustainability of the water supply in the arid southwestern United States. We have developed a first-ever basin-wide actual evapotranspiration (ETa) map of the CRB at the Lands
Authors
Ramesh K. Singh, Gabriel B. Senay, Naga Manohar Velpuri, Stefanie Bohms, Scott Russell L, James P. Verdin
Geodatabase compilation of hydrogeologic, remote sensing, and water-budget-component data for the High Plains aquifer, 2011
The High Plains aquifer underlies almost 112 million acres in the central United States. It is one of the largest aquifers in the Nation in terms of annual groundwater withdrawals and provides drinking water for 2.3 million people. The High Plains aquifer has gained national and international attention as a highly stressed groundwater supply primarily because it has been appreciably depleted in so
Authors
Natalie A. Houston, Sophia L. Gonzales-Bradford, Amanda T. Flynn, Sharon L. Qi, Steven M. Peterson, Jennifer S. Stanton, Derek W. Ryter, Terry L. Sohl, Gabriel B. Senay
A comprehensive evaluation of two MODIS evapotranspiration products over the conterminous United States: using point and gridded FLUXNET and water balance ET
Remote sensing datasets are increasingly being used to provide spatially explicit large scale evapotranspiration (ET) estimates. Extensive evaluation of such large scale estimates is necessary before they can be used in various applications. In this study, two monthly MODIS 1 km ET products, MODIS global ET (MOD16) and Operational Simplified Surface Energy Balance (SSEBop) ET, are validated over t
Authors
Naga M. Velpuri, Gabriel B. Senay, Ramesh K. Singh, Stefanie Bohms, James P. Verdin
Analysis of long-term trends (1950–2009) in precipitation, runoff and runoff coefficient in major urban watersheds in the United States
This study investigates the long-term trends in precipitation, runoff and runoff coefficient in major urban watersheds in the United States. The seasonal Mann–Kendall trend test was performed on monthly precipitation, runoff and runoff coefficient data from 1950 to 2009 obtained from 62 urban watersheds covering 21 major urban centers in the United States. The results indicate that only five out o
Authors
N.M. Velpuri, G.B. Senay
Actual evapotranspiration modeling using the operational Simplified Surface Energy Balance (SSEBop) approach
Remote-sensing technology and surface-energy-balance methods can provide accurate and repeatable estimates of actual evapotranspiration (ETa) when used in combination with local weather datasets over irrigated lands. Estimates of ETa may be used to provide a consistent, accurate, and efficient approach for estimating regional water withdrawals for irrigation and associated consumptive use (CU), es
Authors
Mark E. Savoca, Gabriel B. Senay, Molly A. Maupin, Joan F. Kenny, Charles A. Perry
Filter Total Items: 14