A5058342180- Hydrology and Watershed Management Studies
- Soil and Water Nutrient Dynamics
- Soil erosion and sediment transport
- Hydrology and Sediment Transport Processes
- Water Quality and Resources Studies
- Fish Ecology and Management Studies
- Soil and Unsaturated Flow
- Groundwater flow and contamination studies
- Peatlands and Wetlands Ecology
- Climate variability and models
- Landslides and related hazards
- Cryospheric studies and observations
- Remote Sensing and LiDAR Applications
- Aquatic Ecosystems and Phytoplankton Dynamics
- Karst Systems and Hydrogeology
- Freshwater macroinvertebrate diversity and ecology
- Nuclear and radioactivity studies
- Plant Water Relations and Carbon Dynamics
- Geological Modeling and Analysis
- Flood Risk Assessment and Management
- Soil Geostatistics and Mapping
- Water-Energy-Food Nexus Studies
- Hydrological Forecasting Using AI
- Data-Driven Disease Surveillance
- Mine drainage and remediation techniques
United States Geological Survey
2014-2024
Ohio-Kentucky-Indiana Water Science Center
2020-2024
Indiana Geological and Water Survey
2018-2023
Kentucky Science Center
2014-2021
University of the Pacific
2002-2006
University of California, Riverside
1998
Effective and efficient methods are needed to map agricultural subsurface drainage systems. Visible-color (VIS-C), multispectral (MS), thermal infrared (TIR) imagery obtained by unmanned aerial vehicles (UAVs) may provide a means for determining pipe locations. Aerial surveys using UAV with VIS-C, MS, TIR cameras were conducted at 29 field sites in the Midwest U.S.A. evaluate potential of this technology mapping buried pipes. Overall results show VIS-C detected least some drain lines 48 %...
Williamson, Tanja N. and Charles G. Crawford, 2011. Estimation of Suspended-Sediment Concentration From Total Suspended Solids Turbidity Data for Kentucky, 1978-1995. Journal the American Water Resources Association (JAWRA) 47(4):739-749. DOI: 10.1111/j.1752-1688.2011.00538.x Abstract: sediment is a constituent water quality that monitored because concerns about accelerated erosion, nonpoint contamination resources, degradation aquatic environments. In order to quantify relationship among...
Abstract Whether a waterway is temporary or permanent influences regulatory protection guidelines, however, classification can be subjective due to combination of factors, including time year, antecedent moisture conditions, and previous experience the field investigator. Our objective was develop standardized protocol using publically available spatial information classify ephemeral, intermittent, perennial streams. hypothesis that observations flow along stream channel could compared...
As part of the Great Lakes Restoration Initiative, paired edge-of-field sites were established in high priority subwatersheds to assess effectiveness agricultural management practices. One pairing was Black Creek, a tributary Maumee River and Lake Erie. These fields because similarity soils, topography, management. Following two years baseline data collection from these fields, consistent differences water quantity quality observed for tile networks draining despite being adjacent managed...
Documenting the effects of agricultural land retirement on stream-sediment sources is critical to identifying management practices that improve water quality and aquatic habitat. Particularly difficult quantify are from conservation easements commonly discontinuous along channelized streams ditches throughout midwestern United States. Our hypotheses were sediment cropland, retired land, stream banks, roads would be discernible using isotopic elemental concentrations source contributions vary...
Sediment fingerprinting of fluvial targets has proven useful to guide conservation management and prioritize sediment sources for Federal State supported programs in the United States. However, collection analysis source samples can make these studies unaffordable, especially when needed multiple drainage basins. We investigate potential use from a basin with similar physiography (using one "pair" evaluate other) or combined basins (a "library").Source eight across six ecoregions were...
First posted November 18, 2015 For additional information, contact: Coordinator - National Water Census U.S. Geological Survey 1770 Corporate Drive, Ste. 500 Norcross, GA 30093 678-524-1544 http://water.usgs.gov/watercensus/ The Availability Tool for Environmental Resources (WATER) is a decision support system the nontidal part of Delaware River Basin that provides consistent and objective method simulating streamflow under historical, forecasted, managed conditions. In order to quantify...
The Water Availability Tool for Environmental Resources (WATER) is a TOPMODEL‐based hydrologic model that depends on spatially accurate soils data to function in diverse terranes. In Kentucky, this includes mountainous regions, karstic plateau, and alluvial plains. Soils are critical because they quantify the space store water, as well how water moves through soil stream during storm events. We compared performs using two different sources of data—Soil Survey Geographic Database (SSURGO)...
Black Creek, a headwater to the Maumee River and western Lake Erie, is an agricultural basin with mix of cropland (66%), pasture (19%), forest (7%) linked by road network rural community. Suspended sediment was collected monthly during 2018 water year for main stem two sub-basins using in-situ, passive samplers that integrated range streamflow conditions. Sediment fingerprinting used 44 indicators apportion samples among five sources: cropland, pasture, forest, dirt, streambanks. Cropland,...
Knowing subsurface drainage (tile-drain) extent is integral to understanding how landscapes respond precipitation events and subsequent days of drying, as well soil characteristics land management influence stream response. Consequently, a time series tile-drain would inform one aspect that complicates our ability explain streamflow water-quality function climate variability or conservation management. We trained UNet machine-learning model, convolutional neural network designed highlight...
In 1960, areas of chaparral were converted to perennial grass after a fire burned most the San Dimas Experimental Forest in southern California. This conversion provided an opportunity compare regolith moisture patterns zero‐order watersheds under native with those nonnative veldt ( Ehrharta calycina Sm.). We collected data as function vegetation type and watershed element test hypothesis that from altered water distribution vadose zone result changes physical environment, including rooting...
The Water Availability Tool for Environmental Resources (WATER) was developed in cooperation with the Kentucky Division of to provide a consistent and defensible method estimating streamflow water availability ungaged basins. WATER is process oriented; it based on TOPMODEL code incorporates historical water-use data together physiographic that quantitatively describe topography soil-water storage. result user-friendly decision tool can estimate non-karst areas without additional or...
Total phosphorus (TP), dissolved P (DP), and suspended sediment (SS) were sampled in Black Creek, Indiana, monthly during base flow for 100 storm events water years 2016-2019, enabling analysis of how each these varied as a function streamflow field conditions at nested edge-of-field sites. Particulate was normalized SS (PSS = [TP - DP]/SS). Streamflow differentiated by maximum TP concentrations co-occurring with (SED) or DP (SOL). The combination new precipitation high antecedent soil-water...
Abstract In order to simulate the potential effect of forecasted land‐cover change on streamflow and water availability, there has be confidence that hydrologic model used is sensitive small changes in land cover (<10%) this exceeds inherent uncertainty conditions. To investigate this, a 26‐year record was simulated for 33 basins (54–928 km 2 ) Delaware River Basin using three dates cover: 2011 National Land‐Cover Dataset (Homer, Fry, & Barnes, ), 2030 conditions representing median...
Abstract The San Diego County District Attorney's office requested our help to investigate the theft of palm trees from a private collection exotic plants. Circumstantial evidence led investigators suspect's residence where 33 were found. Because victim raised all palms seed in same potting mix, we compared morphologic and mineralogic properties soil samples collected root balls that at victim's residences. Analyses color, reaction with dilute hydrochloric acid, particle size, heavy:light...