A5045812572- Hydrology and Watershed Management Studies
- Groundwater flow and contamination studies
- Hydrological Forecasting Using AI
- Groundwater and Isotope Geochemistry
- Soil Moisture and Remote Sensing
- Flood Risk Assessment and Management
- Soil and Unsaturated Flow
- Plant Water Relations and Carbon Dynamics
- Climate variability and models
- Cryospheric studies and observations
- Soil and Water Nutrient Dynamics
- Hydrology and Drought Analysis
- Water resources management and optimization
- Hydrology and Sediment Transport Processes
- Fish Ecology and Management Studies
- Groundwater and Watershed Analysis
- Soil Carbon and Nitrogen Dynamics
- Reservoir Engineering and Simulation Methods
- Climate change and permafrost
- Environmental Monitoring and Data Management
- Soil Geostatistics and Mapping
- Meteorological Phenomena and Simulations
- Landslides and related hazards
- Soil erosion and sediment transport
- demographic modeling and climate adaptation
University of California, Riverside
2016-2025
University of California System
2022
United States Geological Survey
2022
District of Columbia Water and Sewer Authority
2022
University of Victoria
2022
Stanford University
2022
Upper Midwest Water Science Center
2022
University of Kansas
2022
University of Waterloo
2022
Indiana Geological and Water Survey
2022
Abstract Earth System Models (ESMs) are essential tools for understanding and predicting global change, but they cannot explicitly resolve hillslope‐scale terrain structures that fundamentally organize water, energy, biogeochemical stores fluxes at subgrid scales. Here we bring together hydrologists, Critical Zone scientists, ESM developers, to explore how hillslope may modulate grid‐level fluxes. In contrast the one‐dimensional (1‐D), 2‐ 3‐m deep, free‐draining soil hydrology in most land...
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...
Despite the importance of mountainous catchments for providing freshwater resources, especially in semi‐arid regions, little is known about key hydrological processes such as mountain block recharge (MBR). Here we implement a data‐based method informed by isotopic data to quantify MBR rates using recession flow analysis. We applied our hybrid sky island catchment southern Arizona, United States. Sabino Creek 91 km 2 with its sources near summit Santa Catalina Mountains northeast Tucson....
Abstract Integrated land surface‐groundwater models are valuable tools in simulating the terrestrial hydrologic cycle as a continuous system and exploring extent of surface‐subsurface interactions from catchment to regional scales. However, fidelity model simulations is impacted not only by vegetation subsurface parameterizations, but also antecedent condition state variables, such initial soil moisture, depth groundwater, ground temperature. In surface modeling, given often run repeatedly...
Abstract Precipitation is a key input variable in distributed surface water‐groundwater models, and its spatial variability expected to impact watershed hydrologic response via changes subsurface flow dynamics. Gridded precipitation data sets based on gauge observations, however, are plagued by uncertainty, especially mountainous terrain where networks sparse. To examine the mechanisms which uncertainty propagates through watershed, we perform series of numerical experiments using an...
Baseflow is a critical component of streamflow, as it maintains flow during meteorological drought. However, our understanding baseflow response to droughts limited. In this study, we presented flexible approach for detecting precipitation and their corresponding recovery. Using framework, analyzed data from 358 anthropogenically unaffected catchments characterize the recovery properties across United States. Results showed that were more severe than droughts, with duration ranging between 9...
Managed Aquifer Recharge (MAR) is a promising approach to enhance water supply resilience, but it faces significant challenges, such as limited space and time for recharge activities, well uncertain bio-geophysical processes, complex subsurface flow heterogeneity. In this review, we assess the viability of hydrology-based approaches groundwater replenishment identify missing components in existing recovery activities. We discuss expanding opportunities under-utilized sources locations...
Abstract. Increases in greenhouse gas concentrations are expected to impact the terrestrial hydrologic cycle through changes radiative forcings and plant physiological structural responses. Here, we investigate nature frequency of non-stationary hydrological response as evidenced water balance studies over 166 anthropogenically unaffected catchments Australia. Non-stationarity is investigated analysis long-term trend annual runoff ratio (1984–2005). Results indicate that a significant (p...
Woody plant encroachment (WPE) into grasslands is a global phenomenon that associated with land degradation via xerification, which replaces grasses shrubs and bare soil patches. It remains uncertain how the processes of WPE climate change may combine to impact water availability for ecosystems. Using process-based model constrained by watershed observations, our results suggest both xerification augment groundwater recharge increasing channel transmission losses at expense available water....
Abstract Soil biota generates carbon that exports vertically to the atmosphere (CO 2 ) and transports laterally streams rivers (dissolved organic inorganic carbon, DOC DIC). These processes, together with chemical weathering, vary flow paths across hydrological regimes; yet an integrated understanding of these interactive processes is still lacking. Here we ask: How what extent do subsurface transformation, solute export differ structure regimes? We address this question using a hillslope...
Abstract. Mountainous regions act as the water towers of world by producing streamflow and groundwater recharge, a function that is particularly important in semiarid regions. Quantifying rates mountain system recharge difficult, hydrologic models offer method to estimate over large scales. These estimates are prone uncertainty from various sources including model structure parameters. The quality meteorological forcing datasets, mountainous regions, source often neglected investigations. In...
The depth distribution of soil organic carbon (SOC) is governed by the interaction many ecosystem features, including differential C inputs in shallow and deep soils redistribution via water flow through profile. In C-rich Mollisols particular, we need to better understand degree which conversion native prairie cultivated lands changing loss retention. We probed multiple mechanisms driving these processes using two approaches: one leverages a regional-scale dataset derived from Natural...
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...
Although groundwater is a major resource of water in the western US, little research has been done on impacts climate change storage and recharge West. Here we assess impact projected changes near (2021-2050) far (2071-2100) future across US. Recharge expected to decrease slightly (highly certain) West (-1.6%) Southwest (-2.9%) regions considerably South region (-10.6%) future. The Northern Rockies get more both (+5.0%) (+9.0%) In general, southern portions US are less northern will more....
Abstract To estimate the robustness of hydrologic models under projected future climate change, researchers test transferability between climatically contrasting observed periods. This approach can only assess performance changes induced by altered precipitation and related environmental dynamics (e.g., greening wet conditions), since instrumental record does not contain temperatures or carbon dioxide levels that are similar to change projections. Additionally, there is an inherent...
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 variability and change impact groundwater resources by altering recharge rates. In semi‐arid Basin Range systems, this is likely to be most pronounced in mountain system (MSR), a process which constitutes significant component of these basins. Despite its importance, the physical processes that control MSR have not been fully investigated because limited observations complexity mountainous catchments. As result, empirical equations, provide basin‐wide estimate mean annual using...
Abstract Urban areas are the primary source of human-made litter globally, and roadsides a accumulation location. This study aimed to investigate how arrives at determine rate composition roadside litter. We monitored select in Inland Empire, California, for abundance (count) (material, item, brand type). Receipt with sale time location information was used whether wind, runoff, or human travel were dominant transport agents. Only 9% receipts could have experienced wind direction not...
One of the key uncertainties in site‐based evaluations land surface, hydrological or ecological models stems from lack availability downward long‐wave radiation, even at observational stations where tens other variables are measured. State art techniques for its synthesis typically functionally dependent on surface temperature, vapour pressure and some representation cloudiness. Here we show that existing functional forms underutilise information these predictor variables, fact cloudiness...