A5028382643- Hydrology and Watershed Management Studies
- Groundwater flow and contamination studies
- Groundwater and Isotope Geochemistry
- Water resources management and optimization
- Soil and Water Nutrient Dynamics
- Geophysics and Gravity Measurements
- Hydrological Forecasting Using AI
- Hydrology and Sediment Transport Processes
- Flood Risk Assessment and Management
- Marine and coastal ecosystems
- Fish Ecology and Management Studies
- Water Quality and Resources Studies
- Soil erosion and sediment transport
- Soil and Unsaturated Flow
- Hydrology and Drought Analysis
- Water-Energy-Food Nexus Studies
- Aquatic and Environmental Studies
- Geophysical and Geoelectrical Methods
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Dam Engineering and Safety
- Karst Systems and Hydrogeology
- Solar and Space Plasma Dynamics
- Industrial Gas Emission Control
- Methane Hydrates and Related Phenomena
University of Waterloo
2006-2024
University of Kansas
2011-2022
United States Geological Survey
2011-2022
Indiana Geological and Water Survey
2022
Upper Midwest Water Science Center
2022
District of Columbia Water and Sewer Authority
2022
University of Victoria
2022
Stanford University
2022
University of California, Riverside
2022
University of Idaho
2022
Existing studies on the impacts of climate change groundwater recharge are either global or basin/location-specific. The lack specificity to inform decision making, while local do little clarify potential changes over large regions (major river basins, states, groups states), a scale often important in development water policy. An analysis impact across western United States (west 100° longitude) is presented synthesizing existing and applying current knowledge processes amounts. Eight...
The use of conservative geochemical and isotopic tracers along with mass balance equations to determine the pre‐event groundwater contributions streamflow during a rainfall event is widely used for hydrograph separation; however, aspects related influence surface subsurface mixing processes on estimates contribution remain poorly understood. Moreover, lack precise definition “pre‐event” versus “event” one hand “old” “new” water components other has seemingly led confusion within hydrologic...
Abstract Effective groundwater management is critical to future environmental, ecological, and social sustainability requires accurate estimates of withdrawals. Unfortunately, these are not readily available in most areas due physical, regulatory, challenges. Here, we compare four different approaches for estimating withdrawals agricultural irrigation. We apply methods a groundwater‐irrigated region the state Kansas, USA, where high‐quality withdrawal data evaluation. The represent broad...
The Western Cape (WC), South Africa. WC has become increasingly dependent on groundwater in recent years due to repeated droughts. A framework monitor the regional levels is urgently required sustainably manage WC's water resources, since region inconsistent or unavailable monitoring data. Therefore, this study aims understand how Gravity Recovery and Climate Experiment (GRACE) Global Land Data Assimilation System (GLDAS) data can be used storage variations (ΔGWS) WC. In-situ ΔGWS...
Abstract Thermal stream loadings from both natural and anthropogenic sources have significant relevance with respect to ecosystem health water resources management, particularly in the context of future climate change. In recent years, there has been an increase field‐based research directed towards characterizing thermal energy transport exchange processes that occur at surface water/groundwater interface streams. spite this effort, relatively little work performed simulate these exchanges...
Abstract Reductions in streamflow caused by groundwater pumping, known as “streamflow depletion,” link the hydrologic process of stream‐aquifer interactions to human modifications water cycle. Isolating impacts pumping on is challenging because other climate and activities concurrently impact streamflow, making it difficult separate individual drivers change. In addition, there can be lags between when occurs affected. However, accurate quantification depletion critical integrated surface...
Climate predictions indicate that precipitation patterns will change and average air temperatures increase across much of the planet. These changes alter surface water groundwater which can significantly affect local regional environment. Here, we examine role timing in to temperature carbonate-karst aquifers using measured level data from Konza Prairie Long-Term Ecological Research Site, Kansas. We demonstrate shifts increased cool-season may mitigate increases produced by annual...
Abstract Relating Gravity Recovery and Climate Experiment (GRACE)‐derived terrestrial water storage anomaly (aTWS) variations to in situ groundwater data is important understanding GRACE utility. Here GRACE‐derived annual changes aTWS (ΔTWS) from National Aeronautics Space Administration's Jet Propulsion Laboratory Goddard Flight Center are compared saturated volumes (ΔGW) the High Plains aquifer (HPA) overlying alluvial aquifers Kansas. Regression analysis suggests that trends ΔTWS strongly...
Baseflow is the portion of streamflow that comes from groundwater and subsurface sources. Although baseflow essential for sustaining streams during low flow drought periods, we have little information about how why it has changed over large regions continental United States. The objective this study was to evaluate changes in climate system affected observed monthly records at 3,283 USGS gauges last 30 years (1989–2019). We developed a statistical modeling framework determine relationship...
Precipitation‐induced overland and groundwater flow mixing processes are quantified to analyze the temporal (event pre‐event water) spatial (groundwater discharge runoff) origins of water entering a stream. Using distributed‐parameter control volume finite‐element simulator that can simultaneously solve fully coupled partial differential equations describing 2‐D Manning 3‐D Darcian advective‐dispersive transport, mechanical (driven by hydraulic potential) tracer‐based hydrograph separation...
Core Ideas Konza Prairie is a reference ecosystem for evaluation of current and former grasslands. Hydrologic change includes climatic geologic factors such as karstification. Future research needed to expand vadose zone knowledge. Agricultural intensification urbanization have greatly reduced the extent tallgrass prairie across North America. To evaluate impact these changes, unperturbed required. The Biological Station in northeastern Kansas long‐term site at which critical approach has...
Abstract Proper knowledge of potential groundwater recharge (PGR) and its spatiotemporal distribution are essential for sustainable management, especially within the context climate change. Here, a robust GIS‐based water budget framework was developed to estimate PGR at regional scale map spatial distribution. This is demonstrated over Saguenay‐Lac‐Saint‐Jean region (13 200 km 2 ) Quebec (Canada). The mapping process based on model incorporating components. vertical inflows (VI) include...
The hyporheic zone has received significant attention in recent years due to its role regulating the physical, chemical, and biological processes that buffer fluvial systems at a variety of scales. exchange water through is also important for regulation stream streambed temperatures. Recent research utilized temperatures quantify groundwater discharge streams using methods, including one-dimensional analytical solutions vertical flux across interface. presence lateral flows, flow, will cause...
Few river systems remain unaltered by engineered water management structures. Yet research investigating the interdependence between natural and components of a hydrologic system within modeling framework is limited. Most current models either focus on system, incorporating only portion structures often excluding elements like reservoir operations, or simplifying temporal spatial variations surface water/groundwater flow system. The objective this work to link an object-oriented model...