David M Wolock, Ph.D.
David Wolock is a Supervisory Hydrologist with the USGS Water Resources Mission Area.
Science and Products
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A conceptual framework for effectively anticipating water-quality changes resulting from changes in agricultural activities A conceptual framework for effectively anticipating water-quality changes resulting from changes in agricultural activities
Agricultural activities can affect water quality and the health of aquatic ecosystems; many water-quality issues originate with the movement of water, agricultural chemicals, and eroded soil from agricultural areas to streams and groundwater. Most agricultural activities are designed to sustain or increase crop production, while some are designed to protect soil and water resources...
Authors
Paul D. Capel, David M. Wolock, Richard H. Coupe, Jason L. Roth
Predictability and selection of hydrologic metrics in riverine ecohydrology Predictability and selection of hydrologic metrics in riverine ecohydrology
The natural flow regime is critical to the health of riverine ecosystems. Many hydrologic metrics (HMs) have been developed to describe natural flow regimes, quantify flow alteration, and provide the hydrologic foundation for the development of environmental flow standards. Many applications require the use of models to predict expected natural values of HMs from basin characteristics at...
Authors
Ken Eng, Theodore E. Grantham, Daren M. Carlisle, David M. Wolock
Evidence that recent warming is reducing upper Colorado River flows Evidence that recent warming is reducing upper Colorado River flows
The upper Colorado River basin (UCRB) is one of the primary sources of water for the western United States, and increasing temperatures likely will elevate the risk of reduced water supply in the basin. Although variability in water-year precipitation explains more of the variability in water-year UCRB streamflow than water-year UCRB temperature, since the late 1980s, increases in...
Authors
Gregory J. McCabe, David M. Wolock, Gregory T. Pederson, Connie A. Woodhouse, Stephanie A. McAfee
Estimating discharge and nonpoint source nitrate loading to streams from three end‐member pathways using high‐frequency water quality data Estimating discharge and nonpoint source nitrate loading to streams from three end‐member pathways using high‐frequency water quality data
The myriad hydrologic and biogeochemical processes taking place in watersheds occurring across space and time are integrated and reflected in the quantity and quality of water in streams and rivers. Collection of high‐frequency water quality data with sensors in surface waters provides new opportunities to disentangle these processes and quantify sources and transport of water and...
Authors
Matthew P. Miller, Anthony J. Tesoriero, Krista Hood, Silvia Terziotti, David M. Wolock
Biological relevance of streamflow metrics: Regional and national perspectives Biological relevance of streamflow metrics: Regional and national perspectives
Protecting the health of streams and rivers requires identifying ecologically significant attributes of the natural flow regime. Streamflow regimes are routinely quantified using a plethora of hydrologic metrics (HMs), most of which have unknown relevance to biological communities. At regional and national scales, we evaluated which of 509 commonly used HMs were associated with...
Authors
Daren M. Carlisle, Theodore E. Grantham, Ken Eng, David M. Wolock
Streamflow alteration and habitat ramifications for a threatened fish species in the Central United States Streamflow alteration and habitat ramifications for a threatened fish species in the Central United States
In the Central United States, the Arkansas darter (Etheostoma cragini) is listed as a threatened fish species by the State of Kansas. Survival of the darter is threatened by loss of habitat caused by changing streamflow conditions, in particular flow depletion. Future management of darter populations and habitats requires an understanding of streamflow conditions and how those conditions...
Authors
Kyle E. Juracek, Ken Eng, Daren M. Carlisle, David M. Wolock
Science and Products
Filter Total Items: 13
No Result Found
Filter Total Items: 134
A conceptual framework for effectively anticipating water-quality changes resulting from changes in agricultural activities A conceptual framework for effectively anticipating water-quality changes resulting from changes in agricultural activities
Agricultural activities can affect water quality and the health of aquatic ecosystems; many water-quality issues originate with the movement of water, agricultural chemicals, and eroded soil from agricultural areas to streams and groundwater. Most agricultural activities are designed to sustain or increase crop production, while some are designed to protect soil and water resources...
Authors
Paul D. Capel, David M. Wolock, Richard H. Coupe, Jason L. Roth
Predictability and selection of hydrologic metrics in riverine ecohydrology Predictability and selection of hydrologic metrics in riverine ecohydrology
The natural flow regime is critical to the health of riverine ecosystems. Many hydrologic metrics (HMs) have been developed to describe natural flow regimes, quantify flow alteration, and provide the hydrologic foundation for the development of environmental flow standards. Many applications require the use of models to predict expected natural values of HMs from basin characteristics at...
Authors
Ken Eng, Theodore E. Grantham, Daren M. Carlisle, David M. Wolock
Evidence that recent warming is reducing upper Colorado River flows Evidence that recent warming is reducing upper Colorado River flows
The upper Colorado River basin (UCRB) is one of the primary sources of water for the western United States, and increasing temperatures likely will elevate the risk of reduced water supply in the basin. Although variability in water-year precipitation explains more of the variability in water-year UCRB streamflow than water-year UCRB temperature, since the late 1980s, increases in...
Authors
Gregory J. McCabe, David M. Wolock, Gregory T. Pederson, Connie A. Woodhouse, Stephanie A. McAfee
Estimating discharge and nonpoint source nitrate loading to streams from three end‐member pathways using high‐frequency water quality data Estimating discharge and nonpoint source nitrate loading to streams from three end‐member pathways using high‐frequency water quality data
The myriad hydrologic and biogeochemical processes taking place in watersheds occurring across space and time are integrated and reflected in the quantity and quality of water in streams and rivers. Collection of high‐frequency water quality data with sensors in surface waters provides new opportunities to disentangle these processes and quantify sources and transport of water and...
Authors
Matthew P. Miller, Anthony J. Tesoriero, Krista Hood, Silvia Terziotti, David M. Wolock
Biological relevance of streamflow metrics: Regional and national perspectives Biological relevance of streamflow metrics: Regional and national perspectives
Protecting the health of streams and rivers requires identifying ecologically significant attributes of the natural flow regime. Streamflow regimes are routinely quantified using a plethora of hydrologic metrics (HMs), most of which have unknown relevance to biological communities. At regional and national scales, we evaluated which of 509 commonly used HMs were associated with...
Authors
Daren M. Carlisle, Theodore E. Grantham, Ken Eng, David M. Wolock
Streamflow alteration and habitat ramifications for a threatened fish species in the Central United States Streamflow alteration and habitat ramifications for a threatened fish species in the Central United States
In the Central United States, the Arkansas darter (Etheostoma cragini) is listed as a threatened fish species by the State of Kansas. Survival of the darter is threatened by loss of habitat caused by changing streamflow conditions, in particular flow depletion. Future management of darter populations and habitats requires an understanding of streamflow conditions and how those conditions...
Authors
Kyle E. Juracek, Ken Eng, Daren M. Carlisle, David M. Wolock