Jason A. Hubbart

Jason A. Hubbart
West Virginia University | WVU · Division of Forestry & Natural Resources

PhD

About

231
Publications
35,166
Reads
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2,121
Citations
Citations since 2016
120 Research Items
1797 Citations
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2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
Introduction
Dr. Jason A. Hubbart is a professor of physical hydrology in the Davis College of Agriculture, Natural Resources and Design at West Virginia University. Among other appointments, Dr. Hubbart serves as the West Virginia gubernatorial appointee to the Science and Technical Advisory Committee of the Chesapeake Bay Program, and as the West Virginia ambassador to the World Bank Global Water Partnership.
Additional affiliations
January 2016 - present
West Virginia University
Position
  • Managing Director
August 2007 - December 2015
University of Missouri
Position
  • Professor (Associate) Forest Hydrology
June 2003 - August 2007
University of Idaho
Position
  • PhD Student

Publications

Publications (231)
Article
Full-text available
Land-use practices can greatly impact water quality. Escherichia (E.) coli and Enterococcus are accepted water quality indicators. However, surprisingly little research has been conducted com-paring both organisms’ population density relationships to land use practices and water quality. Stream water grab samples were collected monthly (n = 9 month...
Article
Full-text available
Forcing watershed models with downscaled climate data to quantify future water regime changes can improve confidence in watershed planning. The Soil Water Assessment Tool (SWAT) was calibrated (R 2 = 0.77, NSE = 0.76, and PBIAS = 7.1) and validated (R 2 = 0.8, NSE = 0.78, and PBIAS = 8.8) using observed monthly streamflow in a representative mounta...
Article
Full-text available
A profound transformation in global agricultural production and sustainability must be accomplished by global leadership to avert a food crisis by 2050. Not only is there projected to be a need to feed more than two-billion additional people by then, but also the need to do so using sustainable agricultural design, amidst ongoing climate change and...
Article
As increasing climate variability continues to strain agricultural production, priorities must be aligned with methods to maintain or improve current production processes, including advanced, technology-based methods of measuring individual feed and water intakes and increasing water use efficiency in cattle. A total of 745 animals were evaluated i...
Article
Public opinion has focused on animal agriculture being in competition with growing urban populations for land and water resources. With much of the US in drought conditions, improving water use efficiency is critical for the sustainability of animal agriculture. To date, little has been done to assess water efficiency in cattle. There is evidence f...
Article
Full-text available
Wetland mitigation efforts have increased in numbers over the past two decades to combat wetland loss in the United States. Data regarding wetland function such as biodiversity are required to be collected 5-10 years after a project is complete; however, pre-restoration data that can inform the effectiveness of mitigation are often not collected. W...
Article
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Suspended sediment is an important constituent of freshwater ecosystems that supports biogeochemical, geomorphological, and ecological processes. Current knowledge of suspended sediment is largely based on surface water studies; however, improved understanding of surface and in situ groundwater suspended sediment processes will improve pollutant lo...
Article
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Best management practices (BMP) are defined in the United States Clean Water Act (CWA) as practices or measures that have been demonstrated to be successful in protecting a given water resource from nonpoint source pollution. Unfortunately, the greatest majority of BMPs remain unvalidated in terms of demonstrations of success. Further, there is not...
Article
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Ensuring access to safe drinking water is a challenge in many parts of the world for reasons including, but not limited to, infrastructure age, source water impairment, limited community finances and limitations in Federal water protections. Water quality crises and the prevalence of impaired waters globally highlight the need for investment in the...
Article
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This work was undertaken to develop a low-cost but reliable assessment method for agricultural water requirements in semi-arid locations based on remote sensing data/techniques. In semi-arid locations, water resources are often limited, and long-term water consumption may exceed the natural replenishment rates of groundwater reservoirs. Sustainable...
Article
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An integrated hydro-economic agricultural land use model was developed with endogenous and spatially explicit crop planting, nitrogen (N) fertilizer use and irrigation in the Mississippi River Basin (MRB). We used the model to quantify the effects of energy and N fertilizer prices on N runoff to the Gulf of Mexico. Results show a modest effect of e...
Article
Technology that facilitates estimation of individual animal intake rates in group-housed settings will result in improvements in animal production and management efficiency. Estimating intake in pasture settings may benefit from models that use other variables as proxies. Relationships among dry matter intake (DMI), animal performance variables, an...
Technical Report
Full-text available
Improving soil health has gained traction within the farming community because of its importance to long-term crop production and watershed health. To date, management focuses on in-field crop management practices such as reducing tillage, following 4R nutrient stewardship guidelines, and maximizing vegetative cover throughout the year. Guidelines...
Article
Stream and shallow groundwater responses to rainfall are characterized by high spatial variability, but hydrologic response variability across small, agro‐forested sub‐catchments remains poorly understood. Conceivably, improved understanding in this regard will result in agricultural practices that more effectively limit nutrient runoff, erosion, a...
Article
Full-text available
The aim of this study was to investigate the factors affecting the decrease and change of groundwater level in Ardabil plain in two periods 1995 to 2005 and 2005 to 2015. The monthly precipitation data of Ardebil, Nir, Namin, Abi baglo, Hir, Samiyan stations in the Ardabil plain during the statistical period of 1995-2015 and monthly data of the hei...
Book
Full-text available
Anthropogenic and natural disturbances to freshwater quantity and quality is a greater issue for society than ever before. To successfully restore water resources in impaired watersheds requires understanding the interactions between hydrology, climate, land use, water quality, ecology, social and economic pressures. Current understanding of these...
Article
The Appalachian region of the USA consists of complex geographic, climatological, and ecological characteristics. Water quality is a primary concern in rural Appalachia as many residents are exposed to contaminated streams from surrounding legacy mine sites, inadequate treatment of household wastewater, and trash. Specific water quality problems ar...
Article
Full-text available
There is an immediate need to use available modeling tools to quantify environmental flows targets where changing climate and human activity has altered hydroecologically important streamflow regimes. A model performance assessment was undertaken using observed data collected from five nested gauging sites in a mixed land use watershed of the centr...
Article
Long‐term experimental watershed studies have significantly influenced our global understanding of hydrological processes. The discovery and characterization of how stream water quantity and quality respond to a changing environment (e.g., land use change, acidic deposition) has only been possible due to the establishment of catchments devoted to l...
Article
Urbanization and agricultural intensification can transform landscapes. Changes in land-use can lead to increases in storm runoff and nutrient loadings which can impair the health and function of stream ecosystems. Microorganisms are an integral component of stream ecosystems. Due to the sensitivity of microorganisms to perturbations, changes in hy...
Article
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Freshwater ecosystems are susceptible to biodiversity losses due to land conversion. This is particularly true for the conversion of land from forests for agriculture and urban development. Freshwater sediments harbor microorganisms that provide vital ecosystem services. In dynamic habitats like freshwater sediments, microbial communities can be sh...
Article
Microplastic (MP) particles have been observed in most environments and concentrations are expected to increase over the coming decades given continued and increased production of synthetic polymer products. The expected increase in plastic pollution (including MPs) may elevate the risk posed by these synthetic particles to both environmental and h...
Poster
Full-text available
The relationships between soil nutrient losses from upland areas to receiving water bodies continues to confound watershed planning. In particular, the relationships between P and SRP and specific suspended particle size classes remain largely uncharacterized. This study was initiated to develop an empirical relationship between P, SRP and suspende...
Poster
Full-text available
Understanding land use practice and physiochemical influences on Escherichia (E.) coli concentrations is necessary to improve water quality management and human health. Additionally, elucidating the usefulness of suspended particulate matter as a proxy for fecal contamination may aid in quantifying microbial water quality in cases where direct test...
Poster
Full-text available
Saturated hydraulic conductivity (Ksat) estimates are fundamental for characterizing shallow groundwater processes and predicting hydrologic responses to precipitation events. However, confidence in Ksat estimates is often limited by insufficient measurements and incomplete aquifer information. Thus, there is an ongoing need for observed and model...
Poster
Full-text available
Geochemical impacts of land-use practices remain an area of greatly needed investigation. A nested-scale experimental watershed study was conducted in an urbanizing, mixed-land-use, Appalachian watershed to advance understanding. Twenty-two study sites, characterized by contrasting land use/land cover and drainage area, were instrumented to continu...
Poster
Full-text available
There is an immediate need to quantify and model environmental flows in watersheds where changing climate and human activity has altered hydroecologically important streamflow regimes, water quality variables, and physical habitat. A model performance assessment was undertaken using observed data collected from five nested gauging sites in a mixed...
Poster
Full-text available
Relatively little is known about how increasing (or decreasing) climate total variance may affect short and long-term ecosystem productivity. Investigations in the Eastern Deciduous Forest (EDF) biome stretching from the eastern (north-east West Virginia) to the midwestern United States (mid-Missouri) were undertaken to quantify rates and direction...
Poster
Full-text available
Quantitative characterization of soil to nutrient losses from upland areas to receiving water bodies continues to be a confounding source of error in watershed planning. In particular, loadings of suspended solids and phosphorus (Total P and soluble reactive SRP) have been reported in many studies. However, the relationships between P and SRP and s...
Poster
Full-text available
There is an ongoing need for improved quantitative understanding of land use related impacts to trace elemental concentrations. For example, the cycling of manganese (Mn) occurs through a variety of physical, chemical, and biological interactions, all of which can be influenced by land use practices. While Mn has biological importance, in large qua...
Poster
Full-text available
The correlation of soil to nutrient losses from upland areas to receiving water bodies continues to be an important, yet often confounding, source of error in watershed planning. In particular, loadings of suspended solids and phosphorus (Total P and soluble reactive SRP) have been reported in many studies. However, the relationships between P and...
Presentation
Full-text available
Contemporary climate analyses rarely include equivalent attention to combined variance of hot (cold) and drought (extreme wetness) over time. This is of concern given little is known about how increasing (or decreasing) climate total variance may affect short and long-term ecosystem productivity. Investigations in the Eastern Deciduous Forest (EDF)...
Poster
Full-text available
A Soil and Water Assessment Tool (SWAT) scenario modeling study. Results show differences between: (1) observed environmental flows, and (2) SWAT simulated pre-settlement environmental flows at five nested gauging sites in Hinkson Creek Watershed, a mixed-land-use watershed of the central US.
Article
Full-text available
Anthropogenic and natural disturbances to freshwater quantity and quality is a greater issue for society than ever before. To successfully restore water resources in impaired watersheds requires understanding the interactions between hydrology, climate, land use, water quality, ecology, social and economic pressures. Current understanding of these...
Article
Full-text available
Saturated hydraulic conductivity (K sat) is fundamental to shallow groundwater processes. There is an ongoing need for observed and model validated K sat values. A study was initiated in a representative catchment of the Chesapeake Bay Watershed in the Northeast USA, to collect observed K sat and validate five K sat pedotransfer functions. Soil phy...
Article
Full-text available
Barbuda is one of two major islands that comprise the Caribbean nation of Antigua and Barbuda. The island is known for its secluded pink and white sand beaches and, more recently, for Hurricane Irma (September 2017). The category five mega-storm decimated much of the island's landscape and infrastructure, and the physical damage was widely publiciz...
Article
Full-text available
Escherichia (E.) coli is a fecal microbe that inhabits the intestines of endotherms (primary habitat) and the natural environment (secondary habitats). Due to prevailing thinking regarding the limited capacity of E. coli to survive in the environment, relatively few published investigations exist regarding environmental factors influencing E. coli'...
Article
Full-text available
Stream water temperature (• C) is an important physical variable that influences many biological and abiotic water quality processes. The intermingled mosaic of land-use/land-cover (LULC) types and corresponding variability in stream water temperature (Tw) processes in contemporary mixed-land-use watersheds necessitate research to advance managemen...
Article
Understanding land use practice induced increases in Escherichia (E.) coli and suspended particulate matter (SPM) concentrations is necessary to improve water quality. Weekly stream water samples were collected from 22 stream gauging sites with varying land use practices in a representative contemporary mixed-land use watershed of the eastern USA....
Article
Full-text available
Understanding mixed-land-use practices and physicochemical influences on Escherichia (E.) coli concentrations is necessary to improve water quality management and human health. Weekly stream water samples and physicochemical data were collected from 22 stream gauging sites representing varying land use practices in a contemporary Appalachian waters...
Article
Full-text available
The relationships between Escherichia (E) coli concentration, suspended particulate matter (SPM) particle size class, and land use practices are important in reducing the bacterium's persistence and health risks. However, surprisingly few studies have been performed that quantify these relationships. Conceivably, such information would advance miti...
Chapter
Full-text available
Environmental Biophysics is the field of study of organisms and the physical environment (macro- to microenvironment) that they inhabit. In general, environmental biophysical research is designed to understand, a) the microclimate of a given organism of interest, b) how the organism functions (i.e. natural history) in its microenvironment, and c) h...
Article
Full-text available
Land managers are often inadequately informed to make management decisions in contemporary watersheds, in which sources of impairment are simultaneously shifting due to the combined influences of land use change, rapid ongoing human population growth, and changing environmental conditions. There is, thus, a great need for effective collaborative ad...
Presentation
For many regions of the Earth, anthropogenic climate change is expected to result in increasingly extreme climate conditions. However, contemporary analyses rarely consider the implications of change in variance of climate indices over time. This is of concern given little is known about how increasing (or decreasing) climate variance may affect sh...
Article
Full-text available
Hennig Brandt's discovery of phosphorus (P) occurred during the early European colonization of the Chesapeake Bay region. Today, P, an essential nutrient on land and water alike, is one of the principal threats to the health of the bay. Despite widespread implementation of best management practices across the Chesapeake Bay watershed following the...
Article
Full-text available
Spatial hydroclimatic variability of Eastern North America’s Allegheny Mountain System (AMS) is commonly oversimplified to elevation differences and the rain-shadow effect. Descriptive and higher order statistical properties of hourly meteorological observations (1948–2017) from seven airports were analyzed to better understand AMS climatic complex...
Article
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During the late 19th and very early 20th centuries widespread deforestation occurred across the Appalachian region, USA. However, since the early 20th century, land cover rapidly changed from predominantly agricultural land use (72%; 1909) to forest. West Virginia (WV) is now the USA's third most forested state by area (79%; 1989-present). It is we...
Article
Full-text available
Land use can radically degrade stream physical habitat via alterations to channel geomorphology and sedimentological characteristics. However, independent and combined influences such as those of agricultural and urban land use practices on channel geomorphology and substrate composition remain poorly understood. To further understanding of mixed l...
Article
Full-text available
Increasing variability in temperature and precipitation patterns is reducing the security of natural resources including food, water, and energy in many locations globally. Changes in climate are particularly relevant to the agricultural sector, given the increasing demand for food, less predictable water supplies, and more expensive energy. Among...
Chapter
Full-text available
Contemporary mining creates environments that differ from preexisting conditions, yet those preexisting conditions are expected to be largely re-established during reclamation. As public awareness of impacts of mining increases, regulatory and public expectations of the mining industry advance concurrently. As a consequence, environmental laws that...
Cover Page
Full-text available
We would like to gratefully acknowledge all reviewers for their time and expertise so generously given to the peer review of manuscripts in Sustainable Water Resources Management in 2018. We truly appreciate their continued support and commitment in helping us maintain and improve the quality of our journal.
Article
Methods are needed to quantify stream geomorphological response to land use and hydroclimatic variability. The method applied herein incorporated channel measurements from a physical habitat assessment (channel width, bankfull width, thalweg depth, and estimated cross-sectional area), and streamflow data collected via an experimental watershed stud...
Article
Flow frequency is an important hydrologic statistic to consider in environmental flows assessment. However, there is a paucity of focused interdisciplinary hydrologic assessments that quantify human development influence on flow frequency of small streams (drainage area < 282 km²). Relationships between urban land use and land cover (LULC) and flow...
Article
Full-text available
A high-spatial resolution study design was used to investigate the relationship between land use practices, stream physicochemistry, hydroclimate, and stream Escherichia (E) coli concentrations in a mixed-land-use watershed in the Appalachian region. Stream samples were collected daily from six monitoring sites and analyzed for total E. coli counts...
Article
There is an ongoing need for multidisciplinary investigations that will lead to policy changes that target and reduce natural and anthropic alterations to hydroecological indices important for regional environmental flows management. The hydroecological indices assessed in this study were all deemed ecologically relevant due to causal linkages with...
Preprint
Full-text available
Observed conversion of xerophytic warm genera species to mesophytic cool genera species in North America's Eastern Deciduous Forest (EDF) suggests species composition is in disequilibrium with recent climatic warming. However, increasing annual average temperatures is an oversimplification of long-term climatic change and the importance of climate...
Technical Report
Full-text available
Observed climate data averaged across West Virginia indicate a decreasing diurnal temperature range that may be increasing cloud cover, relative humidity, and growing season length. A recent analysis of long-term observed climate data provides insights into emerging challenges and opportunities for agricultural production in West Virginia.
Article
Full-text available
An exploratory study was conducted in an urbanizing, mixed-land-use Appalachian watershed. Six study sites, characterized by contrasting land use/land cover, were instrumented to continuously monitor stream stage. Weekly grab samples were collected from each site and analyzed for elemental composition via spectrometric and spectrophotometric method...
Article
The El Niño-Southern Oscillation (ENSO) is a dominant source of global climate variability. The effects of this phenomenon alter the flow of heat from tropical to polar latitudes, resulting in weather and climate anomalies that are difficult to forecast. The current work quantified two components of the vertically integrated equation for the total...
Article
Future urban development and climatic changes are likely to affect hydrologic regimes in many watersheds. Quantifying potential water regime changes caused by these stressors is therefore crucial for enabling decision makers to develop viable environmental management strategies. This study presents an approach that integrates mid-21st century imper...
Article
Knowledge gaps remain concerning fundamental suspended sediment physical processes/relationships, such as particle size class dynamics and hydroclimatic variability. Streamwater grab samples were collected four times per week (Oct. 2009-Feb. 2014) at nested-scale gauging sites (n = 5), representing contrasting dominant land use practices. Streamflo...
Article
Full-text available
Competing influences of climate, watershed characteristics, and human activities can confound classic hydrologic process assumptions and, therefore, management efforts in mixed-land-use watersheds. Seven water years (WY2009–2015) of sub-hourly rainfall and stream flow data were collected from five nested gauging sites in a mixed-land-use watershed...
Article
Full-text available
Determining environmental flow requirements to sustain aquatic ecosystem health remains a challenge. The purpose of this research was to quantify the extent of current flow alterations relative to baseline hydrologic conditions of a simulated historic flow regime prior to anthropogenic flow disturbance (i.e., pre-settlement flows). Results allowed...
Article
Full-text available
Physical Habitat Assessments (PHA) are useful to characterize and monitor stream and river habitat conditions, but can be costly and time-consuming. Alternative methods for data collection are getting attention, such as Unmanned Aerial Vehicles (UAV). The objective of this work was to evaluate the accuracy of UAV-based remote sensing techniques rel...
Article
The purpose of this research was to assess the difference between Soil and Water Assessment Tool (SWAT) simulated pre-development and contemporary developed loading regimes in a mixed-land-use watershed of the central United States (US). Native land cover based on soil characteristics was used to simulate pre-development loading regimes using The S...
Article
Mountainous terrain creates variability in microclimate, including nocturnal cold air drainage and resultant temperature inversions. Driven by the elevational temperature gradient, vapor pressure deficit (VPD) also varies with elevation. Soil depth and moisture availability often increase from ridgetop to valley bottom. These variations complicate...
Article
Water resources have served as the basis for war and the facilitator of peace. The control of water has been a statement of power and technological sophistication. However, control may have led to complacency in sustainable management in many locations globally. Humans must therefore reconstruct how they think about water and embrace a contemporary...
Article
Given existing knowledge gaps, there is a need for research that quantitatively characterizes spatiotemporal variation of suspended sediment particle size distribution (PSD) in contemporary watersheds. A five-year study was conducted in a representative watershed of the central United States utilizing a nested-scale experimental watershed study des...
Article
Full-text available
There is a need for research that advances understanding of flow alterations in contemporary watersheds where natural and anthropogenic interactions can confound mitigation efforts. Event-based flow frequency, timing, magnitude, and rate of change were quantified at five-site nested gauging sites in a representative mixed-land-use watershed of the...
Article
Full-text available
Quantification of runoff is critical to estimate and control water pollution in urban regions, but variation in impervious area and land-use type can complicate the quantification of runoff.We quantified the streamflow contributions of subwatersheds and the historical changes in streamflow in a flood prone urbanizing watershed in US Midwest to guid...
Presentation
Full-text available
Abstract Projected increased drought and extreme wet conditions (i.e. enhanced variability) may decrease forest ecosystem productivity in many locations globally. However, there is little understanding of how increasing climate variance may affect forest ecosystem productivity. A study was undertaken in the Eastern Deciduous Forest Biome stretching...
Presentation
Full-text available
Abstract Advancements in watershed management are both a major challenge, and urgent need of this century. Historically, the experimental watershed study (EWS) approach was used in forested wildland watersheds to quantitatively characterize basic landscape alterations (e.g. forest harvest, road building, and water quality). However, in recent years...
Presentation
Full-text available
Abstract Urban ecosystems generate up to 70% of annual greenhouse gas emissions. However, urban vegetation and soils are capable of sequestering substantial quantities of carbon (C). Soil total organic carbon (TOC), soil respiration (SR), and C stored in vegetation were quantified at six 50-m2 study sites in the central United States, including a r...
Article
Two floodplain sites were instrumented, a bottomland hardwood forest and a historic agricultural field. Continuous, automated, in situ shallow groundwater monitoring was paired with a gridded sampling design to facilitate detailed spatiotemporal analysis of water table response to precipitation events. Data were collected at 30 minute intervals for...
Article
Full-text available
Reliable methods are necessary to provide the detailed hydrologic information necessary to improve management of water resources and aquatic ecosystems in developing/urbanizing watersheds. A case study was implemented in a representative 230 km2 mixed-use, urbanizing watershed to advance precipitation/discharge understanding. Precipitation and stre...