Research Hydrologist
Email:
rmwebb@usgs.gov
Office Phone:
303-236-5025
Fax:
303-236-5034
ORCID:
0000-0001-9531-2207
Location
Box 25046
Denver Federal Center
Denver
, CO
80225-0046
US
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The Reaction-Transport Modeling Group provides environmental managers and policy makers with the understanding and tools needed to predict how decisions made today can improve the amount of clean water available to both society and to nature in the future. In support of the project goals, I have developed the Water, Energy, and Biogeochemical Model (WEBMOD). WEBMOD integrates the latest understanding of hydrologic processes with the full gamut of geochemical simulations available in PHREEQC to simulate conservative and reactive transport of solutes that cycle between the atmosphere, the soils, and bedrock.
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The Shingobee Headwaters Aquatic Ecosystem Project is a long-term, multi-disciplinary monitoring and research study of a 28-square-kilometer headwaters watershed in north-central Minnesota that began in 1978. Emphasis is on processes related to hydrology, limnology, geochemistry, and watershed ecology and the land-water and atmosphere-water interfaces. Lakes are a substantial focus and integrator of many of the physical, chemical, and biological processes that occur within watersheds. Large volumes of groundwater discharge provide resilience to lakes and wetlands in response to anthropogenic and climatic influences. Minnesota, located in north-central USA, has been both warmer and wetter than normal during the past...
Categories: Data;
Tags: Field inventory and monitoring,
Groundwater level,
Hydrology,
Limnology,
Shingobee Lake, All tags...
Snow and ice cover,
USGS Science Data Catalog (SDC),
Williams Lake,
hydrogeology,
hydrology,
limnology,
phenology, Fewer tags
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We conducted a scoping review to assess the current state of the science and knowledge gaps of post-wildfire water quality. A scoping review is a rapid, systematic approach that is more superficial compared to traditional reviews, and can be considered a preliminary study that informs future in-depth reviews, meta-analyses, or modelling efforts (Robinne et al., 2020). We developed a driver, factor, stressor, effect (DFSE) conceptual framework to evaluate information gathered from the review. Drivers are categorical variables representing a natural or anthropogenic process or characteristic driving post-fire effects. Factors are measurable variables or properties of a driver used to explain changes in water quality,...
Categories: Data;
Tags: Aquatic Biology,
Ecology,
Environmental Health,
Forestry,
Geochemistry, All tags...
Geomorphology,
Hydrology,
Information Sciences,
Land Use Change,
Remote Sensing,
Sedimentology,
Soil Sciences,
USGS Science Data Catalog (SDC),
Water Quality,
Water Resources,
biological and physical processes,
biota,
ecology,
environment,
fires,
human impacts,
inlandWaters, Fewer tags
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Efficiency of seepage meters, long considered a fixed property associated with the meter design, is not constant in highly permeable sediments. Instead, results from this study indicate that efficiency varies substantially with seepage-bag fullness, duration of bag attachment, depth of meter insertion into the sediments, and seepage velocity. Efficiency also varies substantially in response to variable hydraulic conductivity. The first worksheet titled "Literature efficiency" presents seepage-meter efficiency values from the literature to show the progression of efficiency versus time. The remaining 7 worksheets present time-series data showing seepage-meter efficiency related to several different tests: (1) flow...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Denver Federal Center, Jefferson County,
Hydrology,
Limnology,
USGS Science Data Catalog (SDC),
Water Resources, All tags...
groundwater flow,
permeability, Fewer tags
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