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                    U.S. DEPARTMENT OF AGRICULTURE
 Hydrology and Remote Sensing Laboratory: Beltsville, MD
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Drought Monitoring and Evapotranspiration (ET): Physical scientist Martha Anderson and hydrologist Bill Kustas view a global scale map of ET generated with the ALEXI model.
 Soil Moisture Estimation: Soil scientist Lynn McKee and physical scientist Joseph Alfieri collect soil moisture measurements in the field. The Soil Moisture Active Passive (SMAP) satellite measures the amount of water in the top 5 cm of soil everywhere on Earth’s surface, every 2-3 days.
 Soil and Water Quality Investigations: Agronomist Craig Daughtry and Andy Russ use a portable spectroradiometer to measure reflectance of crop residue to assess soil tillage intensity. Physical scientists Dean Hively and Ray Hunt measure vegetation "greenness" which is related to the crop's nitrogen status.
 Watershed Modeling: Soil scientist Greg McCarty and chemist Cathleen Hapeman use an Acoustic Doppler Channel Profiler to assess water velocity and channel geometry of a Choptank Watershed stream.
 Surface Energy Balance: Hydrologist Bill Kustas checks the position of a water vapor/CO2 sensor and sonic anemometer, which measure the turbulent exchange of water, energy, and CO2 between the soil-plant system and the lower atmosphere.  A dry river bed illustrates the severe ecological and economic consequences of prolonged drought.


Mission


People Alfieri, Joseph Anderson, Martha Bertholon, Alexia Cirone, Richard Cosh, Michael Crompton, Octavia Crow, Wade Du, Ling Foroughi, Maryam Gao, Feng Hapeman, Cathleen Hinson, Audra Izadidehkordi, Sanam Kraatz, Simon Kustas, William
                                            *- Bill* McCarty, Gregory McKee, Lynn Parry, Robert Perry, Aquena Russ, Andrew
                                            *- Andy* Smith, Zacharias
                                            *- Zach* Walker, Victoria Wang, Yiming White, William
                                            *- Alex* Zhang, Xuesong Zhao, Haoteng




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