A5022885104- Geophysics and Gravity Measurements
- Cryospheric studies and observations
- Groundwater and Isotope Geochemistry
- Water resources management and optimization
- Solar and Space Plasma Dynamics
- Hydrology and Watershed Management Studies
- Geology and Paleoclimatology Research
- Geophysical and Geoelectrical Methods
- Transboundary Water Resource Management
- Landslides and related hazards
- Geomagnetism and Paleomagnetism Studies
- Methane Hydrates and Related Phenomena
- Groundwater flow and contamination studies
- Earthquake Detection and Analysis
- Flood Risk Assessment and Management
- GNSS positioning and interference
- earthquake and tectonic studies
- Computational Physics and Python Applications
- Hydraulic Fracturing and Reservoir Analysis
- Water Governance and Infrastructure
- Marine and environmental studies
- Environmental and Cultural Studies in Latin America and Beyond
- Groundwater and Watershed Analysis
- Climate change and permafrost
Ceres
2025
University of California, Santa Barbara
2014-2020
Georgetown University
2013
University of California, Irvine
2013
The University of Texas at Austin
2012
Groundwater is an increasingly important water supply source globally. Understanding the amount of groundwater used versus volume available crucial to evaluate future availability. We present a stress assessment quantify relationship between use and availability in world's 37 largest aquifer systems. according ratio availability, which we call Renewable Stress ratio. The impact quantifying based on nationally reported withdrawal statistics compared novel approach remote sensing observations...
Key Points Massive rate of groundwater depletion in the Middle East Would not have been observable if for space‐based methods. New policies are required peaceable, sustainable water management
The Gorkha earthquake (magnitude 7.8) on 25 April 2015 and later aftershocks struck South Asia, killing ~9000 people damaging a large region. Supported by campaign of responsive satellite data acquisitions over the disaster zone, our team undertook image survey earthquakes' induced geohazards in Nepal China an assessment geomorphic, tectonic, lithologic controls quake-induced landslides. Timely analysis communication aided response recovery informed decision-makers. We mapped 4312 coseismic...
Abstract. The strong elevation gradient of the Himalaya allows investigation altitude and orographic impacts on precipitation isotope values as captured in river samples. This study provides new high-elevation data along a 5000 m collected from rain, snow, glacial-sourced surface waters time-series April to October 2016 differentiate time-variable contributions source Arun River. We find nonlinear trends δ18O δD lapse rates driven by samples at high elevations distinct seasonal signal...
Sahoo et al. [2016] introduce a discussion on the ability of satellite observations, from Gravity Recovery and Climate Experiment (GRACE) mission, to assess groundwater storage change in High Plains Aquifer based findings by Richey [2015a]. [2015a] use GRACE observations estimate trend subsurface world's 37 largest aquifer systems. They found be 0.31 ± 1.0 millimeters per year (mm/yr) (0.16 0.51 cubic kilometers (km3/yr)). [] compare previous estimates their own using available level data....