A5061913310- Hydrology and Watershed Management Studies
- Climate change and permafrost
- Cryospheric studies and observations
- Soil and Water Nutrient Dynamics
- Soil erosion and sediment transport
- Hydrology and Drought Analysis
- Climate variability and models
- Hydrological Forecasting Using AI
- Climate change impacts on agriculture
- Irrigation Practices and Water Management
- Water-Energy-Food Nexus Studies
- Coastal and Marine Dynamics
- Rice Cultivation and Yield Improvement
- Flood Risk Assessment and Management
- Biofuel production and bioconversion
- Climate Change Policy and Economics
- Bioenergy crop production and management
- Forest Biomass Utilization and Management
- Oceanographic and Atmospheric Processes
- Water Quality and Resources Studies
- Climate Change and Sustainable Development
- Sustainability and Climate Change Governance
- Plant Water Relations and Carbon Dynamics
- Water resources management and optimization
- Plant responses to water stress
NSF National Center for Atmospheric Research
2023-2025
Research Applications (United States)
2024
Research Applications Laboratory
2024
University Corporation for Atmospheric Research
2023
Texas A&M University System
2021
Purdue University West Lafayette
2017-2018
Texas A&M University
2016-2017
Abstract Lake surface conditions are critical for representing lake‐atmosphere interactions in numerical weather prediction. The Community Land Model's 1‐D lake component (CLM‐lake) is part of NOAA's High‐Resolution Rapid Refresh (HRRR) 3‐km weather/earth‐system model, which assumes that virtually all the two thousand lakes represented CONUS have distinct (for each lake) but spatially uniform depth. To test sensitivity CLM‐lake to bathymetry, we ran as a stand‐alone model 2019 with...
Drought is one of the most widespread extreme climate events with a potential to alter freshwater availability and related ecosystem services. Given interconnectedness between many services, including food provisioning, it important evaluate drought implications on provisioning Studies about streamflow, nutrient loads, crop yields have been increased these variables are all process-based model outputs that could represent functions contribute However, few studies effects services such as...
Application of a temperature-index melt model incorporated into the Soil and Water Assessment Tool (SWAT) is presented to simulate mass balance (MB) equilibrium line altitude (ELA) three glaciers. The snow accumulation/melt parameters were adjusted glacierized free glacier areas, respectively. SWAT algorithm enabled us consider spatial variation by elevation bands across sub-basins, while in previous studies using SWAT, related constant for an entire basin. results show slight improvement...
Abstract . Interest in cover crops has been increasing the Texas Rolling Plains (TRP) region, mainly to improve soil health. However, there are concerns that could potentially reduce water and thereby affect yield of subsequent cash crops. Previous field studies from this region have demonstrated mixed results, with some showing a reduction crop due others indicating no significant impact on cotton fiber yield. The objectives study were (1) evaluate CROPGRO-Cotton CERES-Wheat modules within...
The Soil and Water Assessment Tool (SWAT) was used to simulate five glacierized river basins that are global in coverage vary climate. included the Narayani (Nepal), Vakhsh (Central Asia), Rhone (Switzerland), Mendoza Andes, Argentina), Central Dry Andes (Chile), with a total area of 85,000 km2. A modified SWAT snow algorithm applied order consider spatial variation associated snowmelt/accumulation by elevation band across each subbasin. In previous studies, melt rates varied as function...
Abstract Marginal land is considered promising for biomass production. However, understanding on crop growth and total biofuel production from this type very limited. This study evaluated potential of switchgrass ( Panicum virgatum ) Miscanthus × giganteus marginal lands in the Upper Mississippi River Basin. A soil water assessment tool model with detailed representation their suitability 2 grasses was setup. defined as cropland grassland capability class 3 to 8. All were included new covers...
Highlights Irrigation water use efficiency was consistently higher under deficit irrigation as compared to full irrigation. always less than the annual allowable pumping limit The first/second week of September ideal for terminating full/deficit in normal years. Ideal termination periods wet/dry years were a earlier/later those Abstract. Cotton ( L.) production Texas High Plains (THP) region relies heavily on with groundwater from underlying Ogallala Aquifer. However, rapidly declining...
Abstract Determining optimum irrigation termination periods for cotton ( Gossypium hirsutum L.) is crucial efficient utilization and conservation of finite groundwater resources the Ogallala Aquifer in Texas High Plains (THP) region. The goal this study was to suggest different Evapotranspiration (ET) replacement-based strategies optimize yield water use efficiency (IWUE) using CROPGRO-Cotton model. We re-evaluated a previously evaluated model updated in-season physiological data from 2017...
<abstract> This study assesses the impacts of climate change on river flow from highly glaciered basins using Soil and Water Assessment Tool (SWAT). Analyses are conducted for five that global in coverage vary climatic condition. These include Narayani (Nepal), Vakhsh (central Asia), Rhone (Switzerland), Mendoza Andes, Argentina), central dry Andes (Chile). The predicted future by two RCP (representative concentration pathway) scenarios (RCP4.5 RCP8.5) six CMIP5 (Coupled Model...
Soil and Water Assessment Tool (SWAT) was used to simulate five glacierized river basins that are global in coverage vary climate. The included the Narayani (Nepal), Vakhsh (Central Asia), Rhone (Switzerland), Mendoza Andes, Argentina), Central Dry Andes (Chile) with a total area of 85,000 km2. A modified SWAT snow algorithm applied order consider spatial variation associated melt /accumulation by elevation band across each subbasin. In previous studies, rates varied as function resulting...
Abstract. A systematic and periodic evaluation of water supply across the United States is critical for gaining comprehensive insights into present state nation's resources strategically planning future. The U.S. Geological Survey (USGS) Integrated Water Availability Assessments (IWAAs) a national initiative designed to characterize past, present, future availability at selected basins in States. Weather Research Forecasting model hydrological modeling extension package (WRF-Hydro) one...
<abstract> <b><sc>Abstract</sc></b>. Increasing population, urbanization, and associated demand for food production compounded by climate change variability have important implications the managed ecosystems water resources of a region. This is particularly true south Asia, which supports one quarter global half whom live below poverty line. region largely dependent on monsoon precipitation water. Given limited developing countries in this region, objective our study was to empirically...
The long-term estimation of fresh water inflow to coastal bays is important for understanding and managing estuarine ecosystems. Texas Water Development Board (TWDB) has estimated the total in using TxRR (Texas Rainfall-Runoff) model, which a simple rainfall-runoff relation model. Recently, TWDB requested develop apply SWAT model up-to-date technologies estimating bays.
<abstract> <bold><sc>Abstract. </sc></bold>Due to the lack of water quality data in lower watersheds Texas coastal region, a Soil and Water Assessment Tool (SWAT) version 2009 model was used estimate terrestrial sediment nutrient loads from non-tidal fresh inflows bays this study. The Development Board (TWDB) has TxRR (Texas Rainfall-Runoff) total inflow annual sediment, nitrogen, phosphorus measured simulated stream flows Texas. Applying newer methods, such as distributed hydrologic models,...
<abstract> Extended Abstract. Climate change studies in South Asia are important because the region supports one quarter of global population (half them living below poverty line). The objective our study is to provide information ways which can be more readily used by climate impact assessment community for developing adaptation and mitigation strategies needed respond these changes. Monthly simulations precipitation from 35 CGCMs participated CMIP5 investigated baseline (1971â2005)...
Abstract The WRF‐Hydro hydrological model has been used in many applications the past with some level of history matching majority these studies. In this study, we use iterative Ensemble Smoother (iES), a powerful parameter estimation methodology implemented open‐source PEST++ software. iES provides an ensemble solution uncertainty bound instead single best estimate which common approach previous We discuss importance accounting for observation noise results wider spread solution....
Texas Water Development Board (TWDB) has been studied and estimated the total fresh water inflow to bays in using TxRR (Texas Rainfall Runoff) model. Recently, TWDB requested develop apply SWAT model up date technologies for estimating inflow, sediment nutrient loads bays. In 2011, (Soil Assessment Tool) was developed applied over by Lee et al. this study, used estimate loading from a coastal watershed based on 2011.
<abstract> <b>Abstract.</b> Ecosystem services provide people with products required for survival, as well an inhabitable environment. are inherently interdependent, therefore managing them requires understanding of the trade-offs among them. By evaluating multiple ecosystem simultaneously, we can improve strategies and programs to address environmental problems. The Upper Mississippi River Basin (UMRB) is a significant agricultural production area key contributor Gulf Mexico hypoxia...
<abstract> <b>Abstract.</b> Glaciers are important water reservoirs and any changes in their extent/volume influences long-term, downstream supply glaciered regions. According to IPCC Fifth Assessment Report (IPCC-AR5), global surface temperature at the end of 21st century likely exceed 2ºC for RCP6.0 RCP8.5 not more than 2â RCP4.5 relative 1850 1900. Warming will continue beyond 2100 glaciers decrease worldwide, with regional variations. The development a hydrologic model adequate...