A5049946299- Cryospheric studies and observations
- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Meteorological Phenomena and Simulations
- Hydrology and Sediment Transport Processes
- Climate change and permafrost
- Soil Moisture and Remote Sensing
- Climate variability and models
- Precipitation Measurement and Analysis
- Groundwater and Isotope Geochemistry
- Methane Hydrates and Related Phenomena
- Geophysics and Gravity Measurements
- Maritime Navigation and Safety
- Hydrology and Drought Analysis
- Soil erosion and sediment transport
- Arctic and Antarctic ice dynamics
- Agriculture, Soil, Plant Science
- Water resources management and optimization
- Coastal and Marine Dynamics
- Fish biology, ecology, and behavior
- UAV Applications and Optimization
- Remote Sensing and LiDAR Applications
- Fish Ecology and Management Studies
- Aerospace and Aviation Technology
- Ecology and Conservation Studies
Science Applications International Corporation (United States)
2019-2025
Goddard Space Flight Center
2019-2025
Universidad del Noreste
2014-2019
University of California, Merced
2015-2016
Northeastern University
2014-2016
The Ohio State University
2012-2014
This study explores the uncertainties in terrestrial water budget estimation over High Mountain Asia (HMA) using a suite of uncoupled land surface model (LSM) simulations. The uncertainty balance components precipitation (P), evapotranspiration (ET), runoff (Q), and storage (TWS) is significantly impacted by driving meteorology, with being most important boundary condition. Ten gridded datasets along mix model-, satellite-, gauge-based products, are evaluated first to assess their...
Climate change impacts fresh submarine groundwater discharge on the Korean Peninsula, increasing vulnerability of coastal regions to environmental degradation and economic consequences. Here, we provide regional estimates along entire coast using established water balance methods. Our findings reveal that western southern coasts Peninsula exhibit higher rates due greater net precipitation compared northern Peninsula. Differences in drainage length between east west coasts, with substantial...
Frequent flooding occurs in many rivers and urban areas, exacerbated by recent increase localized heavy rainfall events induced global climate change. Particularly, the area encompassing Songbaek to Waryong districts Jinju is frequently affected due typhoons rainfall-related outflow from Namgang Dam, resulting significant economic losses, though it located a flood plain. In this study, two analysis models, namely HEC-RAS EPA-SWMM, were used simulate overflow district. specialized 2D...
This study explores the use of a support vector machine (SVM) as observation operator within passive microwave brightness temperature data assimilation framework (herein SVM-DA) to enhance characterization snow water equivalent (SWE) over High Mountain Asia (HMA). A series synthetic twin experiments were conducted with NASA Land Information System (LIS) at number locations across HMA. Overall, SVM-DA is effective improving SWE estimates (~70% reduction in RMSE relative Open Loop) for depths...
Towards qualifying hydrologic changes in the High Mountain Asia (HMA) region, this study explores use of a hyper-resolution (1 km) land data assimilation (DA) framework developed within NASA Land Information System using Noah Multi-parameterization Surface Model (Noah-MP) forced by meteorological boundary conditions from Modern-Era Retrospective analysis for Research and Applications, Version 2 data. Two different sets DA experiments are conducted: 1) satellite-derived snow cover map...
Abstract This study presents a method to estimate streamflow in rivers regulated by lakes or reservoirs using synthetic satellite remote sensing data. To illustrate the approach, new reservoir routing is integrated into Hillslope River Routing model, and case presented for highly river Cumberland basin (46,400 km 2 ). The period April–May 2000, which contains significant flood event that occurred 1–2 May 2000. model shown capture storage/release characterises eight with mean normalized root...
Lakes and reservoirs are widely used for water supply flood control, especially during large storm events. In hydrologic modeling applications, accounting the regulated behavior of distributed throughout a river system poses significant challenge, events, when detailed reservoir operation rules strategies implemented. Building on this problem, study addresses question: Can we model storage changes outlet discharges based satellite measurements surface elevation inundated areas event? A...
The upcoming Surface Water and Ocean Topography (SWOT) satellite mission will measure water surface elevation, its spatial temporal derivatives, inundated area. These observations can be used to estimate river discharge at a global scale. SWOT given area on mid-latitude rivers two or three times per 22-day repeat cycle. In this paper, we suggest an interpolation-based method of estimating height for without (i.e., in between overpasses). A local space-time ordinary kriging (LSTOK) is...
Abstract We present an improvement to a previously presented algorithm that used Bayesian Markov Chain Monte Carlo method for estimating river discharge from remotely sensed observations of height, width, and slope. also error budget calculations the algorithm. The may be utilized by upcoming Surface Water Ocean Topography (SWOT) mission. detailed evaluation using synthetic SWOT‐like (i.e., SWOT AirSWOT, airborne version SWOT). is evaluated simulated AirSWOT over Sacramento Garonne Rivers...
Abstract This first paper of the two‐part series focuses on demonstrating accuracy a hyper‐resolution, offline terrestrial modeling system used for High Mountain Asia (HMA) region. To this end, study systematically evaluates four sets model simulations at point scale, basin and domain scale obtained from different spatial resolutions including 0.01° (∼1‐km) 0.25° (∼25‐km). The assessment is conducted via comparisons against ground‐based observations satellite‐derived reference products. key...
The Susquehanna River basin (SRB) is the largest U.S. watershed (71,250 km2) draining to Atlantic Coast. It encompasses portions of New York, Pennsylvania, and Maryland. Given that annual maximum flood events commonly result from either rain-on-snow or hurricanes/tropical storms, determining potential impacts climate change on flooding behavior especially challenging. This paper presents a modeling system captures these dominant processes, which well-suited for future research investigating...
This second paper of the two-part series focuses on demonstrating impact assimilating satellite-based snow cover and freeze/thaw observations into hyper-resolution, offline terrestrial modeling system used for High Mountain Asia (HMA) region from 2003 to 2016. To this end, study systematically evaluates a total six sets 0.01° (∼1 km) model simulations forced by different precipitation forcings, with without dual assimilation scheme enabled, at point-scale, basin-scale, domain-scale. The key...
<title>Abstract</title> The impact of climate change on fresh submarine ground discharge (SGD) variation the Korean Peninsula challenges coastal regions, making them susceptible to environmental degradation and economic impacts. This study provides first regional estimates SGD along entire coast from 1980 2016, utilizing established water balance methods. Our results indicate that western southern coasts South Korea experience higher rates due greater net precipitation compared North region....