A5007937959- Hydrology and Watershed Management Studies
- Urban Stormwater Management Solutions
- Flood Risk Assessment and Management
- Urban Heat Island Mitigation
- Water-Energy-Food Nexus Studies
- Water resources management and optimization
- Groundwater flow and contamination studies
- Land Use and Ecosystem Services
- Groundwater and Isotope Geochemistry
- Urban Green Space and Health
- Hydrology and Sediment Transport Processes
- Soil and Water Nutrient Dynamics
- Plant Water Relations and Carbon Dynamics
- Urban Transport and Accessibility
- Hydrology and Drought Analysis
- Hydrological Forecasting Using AI
- Water Quality and Resources Studies
- Climate variability and models
- Irrigation Practices and Water Management
- Cryospheric studies and observations
- Energy and Environment Impacts
- Meteorological Phenomena and Simulations
- Tropical and Extratropical Cyclones Research
- Environmental Education and Sustainability
- Water Resources and Management
University of Colorado Boulder
2023-2025
Rainbow Children's Hospital
2024
Colorado State University
2014-2023
ORCID
2021
University of Maryland, Baltimore County
2011-2020
United States Geological Survey
2011-2016
U.S. National Science Foundation
2015-2016
Western Geographic Science Center
2015-2016
University of Maryland, College Park
2015
Brown University
2009
Sustaining natural levels of base flow is critical to maintaining ecological function as stream catchments are urbanized. Stream responds variably urbanization. Base or water tables rise in some locations, fall others, remain constant. This variable response the result array (e.g., physiographic setting and climate) anthropogenic urban development infrastructure) factors that influence hydrology. Perhaps because this complexity, few simple tools exist assist managers predict baseflow change...
Abstract A novel form of urbanization, low impact development (LID), aims to engineer systems that replicate natural hydrologic functioning, in part by infiltrating stormwater close the impervious surfaces generate it. We sought statistically evaluate changes a base flow regime because urbanization with LID, specifically magnitude, seasonality, and rate change. used case study watershed Clarksburg, Maryland, which streamflow was monitored during whole‐watershed from forest agricultural...
Hyporheic and groundwater fluxes typically occur together in permeable sediments beneath flowing stream water. However, streambed water quantified using the thermal method are usually interpreted as representing either or hyporheic fluxes. Our purpose was to improve understanding of co‐occurring temperature measurements analysis one‐dimensional heat transport shallow streambeds. First, we examined how changes affect their relative magnitudes by reevaluating previously published simulations....
Research Article| February 01, 2012 Water Balances along an Urban-to-Rural Gradient of Metropolitan Baltimore, 2001–2009 ADITI S BHASKAR; BHASKAR 1 University Maryland, Baltimore County, Center for Urban Environmental and Education Department Chemical, Biochemical, Engineering, 1000 Hilltop Circle, TRC Room 105, MD 21250 1Corresponding author email: aditi.bhaskar@umbc.edu. Search other works by this on: GSW Google Scholar CLAIRE WELTY & Engineering Geoscience (2012) 18 (1): 37–50....
Abstract The impact of urban development on surface flow has been studied extensively over the last half century, but effects groundwater systems are still poorly understood. Previous studies influence subsurface storage have not revealed any consistent pattern, with results showing increases, decreases, and negligible change in levels. In this paper, we investigated four key features that landscapes. These include reduced vegetative cover, impervious infiltration inflow (I&I) storm...
Abstract The discipline of hydrology has long focused on quantifying the water balance, which is frequently used to estimate unknown fluxes or stores. While technologies for measuring balance components continue improve, all have substantial uncertainty at watershed scale. Watershed‐scale evapotranspiration, storage, and groundwater import export are particularly difficult measure. Given these uncertainties, analyses based assumed closure highly sensitive propagation errors omission, where...
Urban streams are often managed in ways that contribute to societal inequities. Members of marginalized groups frequently exposed elevated flood risk and impaired water quality, with reduced access essential infrastructure greenspace within stream corridors. The freshwater science research community has traditionally argued for management improves ecological integrity, which can have the unintended consequence steering investments away from most degraded streams, low-income neighborhoods. We...
Abstract Distributed, infiltration‐based approaches to stormwater management are being implemented mitigate effects of urban development on water resources. One the goals this type storm management, sometimes called low impact or green infrastructure, is maintain groundwater recharge and stream base flow at predevelopment levels. However, connection between not straightforward. Water infiltrated through facilities may be stored in soil moisture, taken up by evapotranspiration contribute...
Green stormwater infrastructure implementation in urban watersheds has outpaced our understanding of practice effectiveness on streamflow response to precipitation events. Long-term monitoring experimental suburban Clarksburg, Maryland, USA, provided an opportunity examine changes event-based metrics two treatment that transitioned from agriculture development with a high density infiltration-focused control measures (SCMs). Urban Treatment 1 predominantly single family detached housing 33%...
Abstract In semi‐arid cities, urbanization can lead to elevated baseflow during summer months. One potential source for additional water is lawn irrigation. We sought quantify irrigation contributions summertime in Denver, Colorado, USA using water‐stable isotope (δ 18 O and δ 2 H) analysis of surface water, tap precipitation. If contributed significantly baseflow, we predicted the isotopic composition Denver's urban streams would more closely resemble local than precipitation or streamflow...
Urban development is a well-known stressor for stream ecosystems, presenting challenge to managers tasked with mitigating its effects. For the past 20 y, streamflow, water quality, geomorphology, and benthic communities were monitored in 5 watersheds Montgomery County, Maryland, USA. This study presents synthesis of multiple studies monitoring efforts area new analysis more recent data document primary lessons learned from monitoring. The include forested control, an urban control...
Abstract Urban development has been observed to lead variable magnitudes of change for stormflow volume and directions baseflow across cities. This work examines temporal streamflow trends the flow duration curve in 53 watersheds during periods peak urban development, which ranged from 1939 2016. We used U.S. Geological Survey streamgage records combined with pre‐development urbanization characteristics identify 20 years analysis each urbanizing watershed. Each gage was paired a nearby...
Abstract Decades of research has concluded that the percent impervious surface cover in a watershed is strongly linked to negative impacts on urban stream health. Recently, there been push by municipalities offset these effects installing structural stormwater control measures (SCMs), which are landscape features designed retain and reduce runoff mitigate urbanisation event hydrology. The goal this study build generalisable relationships between level SCM implementation watersheds resulting...
Abstract Subsurface storage as a regulator of streamflow was investigated an explanation for the large proportion pre‐event water observed in urban streams during storm events. We used multiple lines inquiry to explore relationship between proportion, subsurface storage, and under conditions. First, we three‐dimensional model integrated surface flow solute transport simulate idealized hillslope perform model‐based chemical hydrograph separation stormflow. Second, employed simple dynamical...
Uncontrolled overland flow drives flooding, erosion, and contaminant transport, with the severity of these outcomes often amplified in urban areas. In pervious media such as soils, is initiated via either infiltration-excess (where precipitation rate exceeds infiltration capacity) or saturation-excess (when volume soil profile storage) mechanisms. These processes call for different management strategies, making it important municipalities to discern between them. this study, we derived a...
Abstract Evapotranspiration (ET) from riparian vegetation can be difficult to estimate due relatively abundant water supply, spatial heterogeneity, and interactions with anthropogenic influences such as shallower groundwater tables, increased salinity, nonpoint source pollution induced by irrigation. In semiarid south‐eastern Colorado, reliable ET estimates are scarce for the corridor that borders Arkansas River. This work investigates relationships between ecosystem along River an...
Abstract Weather variability has the potential to influence municipal water use, particularly in dry regions such as western United States (U.S.). Outdoor use can account for more than half of annual household and may be responsive weather, but little is known about how expected magnitude these responses varies across U.S. This nationwide study identified response monthly weather (i.e., temperature, precipitation, evapotranspiration [ET]) using deliveries 229 cities contiguous Using...
Abstract Regional municipal water plans typically do not recognize complex coupling patterns or that increased withdrawals in one location can result changes availability others. We investigated the interaction between urban growth and Baltimore metropolitan region where has occurred beyond reaches of systems into areas rely on wells low‐productivity Piedmont aquifers. used model SLEUTH hydrologic ParFlow. CLM to evaluate this with scenarios 2007 2030. found decreasing groundwater outside...
Hydraulic conductivity (K) is a key hydrologic parameter widely recognized to be difficult estimate and constrain, with little consistent assessment in disturbed, urbanized soils. To K, it either measured, or simulated by pedotransfer functions, which relate K easily measured soil properties. We soils double-ring infiltrometer (Kdring), near-saturated tension infiltrometry (Kminidisk), constant head borehole permeametry (Kborehole), along other properties across the major orders 12 United...
Green stormwater infrastructure (GSI) is increasingly used to reduce input the subsurface network. This work investigated how GSI interacts with surface runoff and structures affect spatial extent distribution of roadway flooding subsequent effects on performance traffic system using a dual-drainage model. The model simulated PCSWMM (Personal Computer Stormwater Management Model) in Harvard Gulch, Denver, Colorado, was then microscopic simulation Simulation Urban Mobility Model (SUMO). We...
Abstract Urbanization alters subsurface flow pathways through expansion of sanitary collection and conveyance infrastructure. Inflow infiltration (I/I) into sewers redistributes slow flows to fast within‐sewer flows. Acting in concert with connected surface water, redistribution I/I complicates the net impact urbanization on streamflow. Elucidation these processes is key characterization prediction urban hydrologic cycles. In this study, we collected sewer streamflow data from 17 sewersheds...
The travel time of a contaminant particle in an aquifer can be used to identify the release contamination from known source, delineate captures zones around wells, and for other applications. is uncertain because spatial variability hydrogeologic properties fluctuations groundwater velocity therefore often represented as random variable. A forward probability density function (pdf) describes that will reach downgradient location, while backward pdf past when was at upgradient such source...
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