A5060308328- Hydrology and Watershed Management Studies
- Fire effects on ecosystems
- Soil and Water Nutrient Dynamics
- Landslides and related hazards
- Soil erosion and sediment transport
- Flood Risk Assessment and Management
- Groundwater and Isotope Geochemistry
- Water Quality and Resources Studies
- Groundwater flow and contamination studies
- Atmospheric and Environmental Gas Dynamics
- Cryospheric studies and observations
- Atmospheric chemistry and aerosols
- Coal and Its By-products
- Water Quality and Pollution Assessment
- Archaeology and Natural History
- Rangeland and Wildlife Management
- Geology and Paleoclimatology Research
- Peatlands and Wetlands Ecology
- Pharmaceutical and Antibiotic Environmental Impacts
- Smart Materials for Construction
- Hydrology and Drought Analysis
- earthquake and tectonic studies
- Recycling and Waste Management Techniques
- Microplastics and Plastic Pollution
- Marine and coastal ecosystems
United States Geological Survey
2016-2025
Government of the United States of America
2023
Pacific Island Ecosystems Research Center
2008-2012
United States Department of the Interior
2012
Shepherd University
1998
Pennsylvania State University
1998
Storms following wildfires are known to impair drinking water supplies in the southwestern United States, yet our understanding of role precipitation post-wildfire quality is far from complete. We quantitatively assessed water-quality impacts different hydrologic events Colorado Front Range and found that for a three-year period, substantial geochemical responses downstream burned area were primarily driven by convective storms with 30 min rainfall intensity >10 mm h−1. These storms, which...
The mobilisation of potentially harmful chemical constituents in wildfire ash can be a major consequence wildfires, posing widespread societal risks. Knowledge composition is crucial to anticipate and mitigate these Here we present comprehensive dataset on the characteristics wide range ashes (42 types total 148 samples) from wildfires across globe examine their potential environmental implications. An extensive review studies analysing was also performed complement compare our dataset. Most...
Abstract Wildfire is a growing concern as climate shifts. The hydrologic effects of wildfire, which include elevated hazards and changes in water quantity quality, are increasingly assessed using numerical models. Post‐wildfire application physically based distributed models provides unique insight into the underlying processes that affect resources after wildfire. This work reviews synthesizes post‐wildfire applications by examining scales geographic/ecohydrologic distribution model...
While microplastic inputs into rivers are assumed to be correlated with anthropogenic activities and accumulate towards the sea, impacts of water management on downstream transport largely unexplored. A comparative study abundance in Boulder Creek (BC), its less urbanized tributary South (SBC), (Colorado USA), characterized evolution microplastics surface sediments, evaluating effects urbanization flow diversions up-to-downstream profiles concentrations loads. Water sediment samples were...
Identifying the sources and impacts of organic inorganic contaminants at watershed scale is a complex challenge because multitude processes occurring in time space. Investigation geochemical transformations requires systematic evaluation hydrologic, landscape, anthropogenic factors. The 1160 km2 Boulder Creek Watershed Colorado Front Range encompasses gradient geology, ecotypes, climate, urbanization. Streamflow originates primarily as snowmelt shows substantial annual variation. Water...
Abstract Extreme climate events—such as hurricanes, droughts, extreme precipitation, and wildfires—have the potential to alter watershed processes stream response. Yet due destructive hazardous nature unpredictability of such events, capturing their hydrochemical signal is challenging. A 5‐year postwildfire study chemistry in Fourmile Creek watershed, Colorado Front Range, USA, focused on high‐frequency storm sampling. During study, was impacted by three additional events—drought two periods...
Wildfires pose a risk to water supplies in the western U.S. and many other parts of world, due potential for degradation quality. However, lack adequate data hinders prediction assessment post-wildfire impacts recovery. The dearth such is related funding monitoring extreme events challenge measuring outsized hydrologic erosive response after wildfire. Assessment surface quality would be strengthened by strategic key parameters, selection sampling locations based on following criteria: (1)...
Humid tropical regions occupy about a quarter of Earth's land surface, yet they contribute substantially higher fraction the water, solutes, and sediment discharged to world's oceans. Nearly half population lives in tropics, development stresses can potentially harm soil resources, water quality, supply addition increase landslide flood hazards. Owing Puerto Rico's steep topography, low storage capacity, dependence on trade-wind precipitation, island's people, ecosystems, are vulnerable...
Like many mountainous areas in the tropics, watersheds Luquillo Mountains of eastern Puerto Rico have abundant rainfall and stream discharge provide much water supply for densely populated metropolitan nearby. Projected changes regional temperature atmospheric dynamics as a result global warming suggest that availability will be affected by patterns. It is essential to understand relative importance different weather systems determine how patterns, interacting with geology vegetation, affect...
Water quality of the Big Thompson River in Front Range Colorado was studied for 2 years following a high-elevation wildfire that started October 2012 and burned 15% watershed. A combination fixed-interval sampling continuous water-quality monitors used to examine timing magnitude changes caused by wildfire. Prefire water well characterized because site has been monitored at least monthly since early 2000s. Major ions nitrate showed largest concentrations; major ion increases were greatest...
Abstract Despite a multitude of small catchment studies, we lack deep understanding how variations in critical zone architecture lead to hydrologic states and fluxes. This study characterizes dynamics 15 catchments the U.S. Critical Zone Observatory (CZO) network where hypothesized that our subsurface structure would illuminate patterns partitioning. The CZOs collect data sets characterize physical, chemical, biological subsurface, while also monitoring fluxes such as streamflow,...
Wildfires burning in watersheds that have been mined and since revegetated pose unique risks to downstream water supplies. A wildfire near Boulder, Colorado, burned a forested watershed recovering from mining disturbance occurred 80–160 years ago allowed us 1) assess arsenic metal contamination streams draining the area for five-year period after 2) determine fire-affected hydrologic drivers convey metals surface water. Most concentrations were low circumneutral waters area. Water sediment...
Abstract Wildfires naturally occur in many landscapes, however they are undergoing rapid regime shifts. Despite the emphasis literature on most severe hydrological responses to wildfire, there remains a knowledge gap thresholds of wildfire (i.e., burned area/drainage area ratio, BAR) required initiate responses. We investigated changes Russian River Watershed (RRW) California, coastal, Mediterranean, drought‐prone, wildfire‐adapted ecosystem, following ten wildfires that 30% watershed. Our...
Abstract Stream discharge is often determined by wading the stream and measuring point velocity at fixed widths depths. However, there are conditions when measurements not safe or poor because of high turbulence, rocky streambeds, non‐standard distributions, shallow sheet flow, aquatic plants, inaccessibility due to ice. Under these conditions, it preferable determine using salt slug addition downstream measurement concentration with time. A new method for determining specific conductance as...
Abstract Microbial processing of atmospheric nitrogen (N) deposition regulates the retention and mobilization N in soils, with important implications for water quality. Understanding links between deposition, microbial communities, transformations, quality is critical as shifts toward reduced remains persistently high many regions. Here, we investigated these connections along an elevation transect Colorado Front Range. Although rates pools extractable increased down transect, soil...
Abstract Wildfires can have a profound impact on hydrosedimentary interactions, or the relationship between sediment and runoff, in forested headwater streams. Quantification of sediment‐runoff dynamics at event scale is integral for understanding source areas transport suspended‐sediment through watershed following wildfire. Here we used high‐frequency turbidity stream discharge data, coupled with discrete measurements, burned unburned watersheds Southern Rocky Mountains western Cascades...
Mountains receive a greater proportion of precipitation than other environments, and thus make disproportionate contribution to the world's water supply. The Luquillo highest rainfall on island Puerto Rico serve as critical source surrounding communities. area's role long-term research site has generated numerous hydrological, ecological, geological investigations that have been included in regional global overviews compare tropical forests ecosystems. Most forest- watershed-wide estimates...
Abstract As atmospheric dust deposition continues to increase across the southwestern United States, it has potential alter ecosystem productivity and structure by delivering nutrients, base cations, pollutants remote mountain sites. Due sparse distribution of monitoring sites, open questions remain about spatial temporal variability fluxes composition mountainous terrain. We present a 1 year (November 2017 November 2018) record seasonal from an elevation transect Colorado Front Range...
Abstract Extreme rainfall events in the humid-tropical Luquillo Mountains, Puerto Rico export bulk of suspended sediment and particulate organic carbon. Using 25 years river carbon data, which targeted hurricanes other large rainstorms, we estimated biogenic yields 65 ± 16 tC km −2 yr −1 for Icacos 17.7 5.1 Mameyes rivers. These granitic volcaniclastic catchments function as substantial atmospheric carbon-dioxide sinks, largely through during extreme rainstorms. Compared to regions, these...