A5030741233- Groundwater flow and contamination studies
- Hydrology and Watershed Management Studies
- Water Quality Monitoring Technologies
- Analytical Chemistry and Sensors
- Fish Ecology and Management Studies
- Insect and Arachnid Ecology and Behavior
- Soil and Unsaturated Flow
- Environmental Monitoring and Data Management
- Energy Efficient Wireless Sensor Networks
- Enhanced Oil Recovery Techniques
- Soil Moisture and Remote Sensing
- Plant and animal studies
- Soil and Water Nutrient Dynamics
- Groundwater and Isotope Geochemistry
- Reservoir Engineering and Simulation Methods
- CO2 Sequestration and Geologic Interactions
- Plant Water Relations and Carbon Dynamics
- Irrigation Practices and Water Management
- Water resources management and optimization
- Species Distribution and Climate Change
- Cryospheric studies and observations
- Atmospheric and Environmental Gas Dynamics
- Electrochemical sensors and biosensors
- Water Quality Monitoring and Analysis
- Water Quality and Pollution Assessment
University of California, Merced
2016-2025
Northwestern University
2017-2020
Midwestern University
2020
University of Iowa
2013-2016
Stanford University
1990-2013
Rogers (United States)
2009
The Graduate Center, CUNY
2009
RTI International
2009
University of Massachusetts Boston
2009
Johns Hopkins University
2002-2009
Abstract Leaf‐cutter ants are a prominent feature in Neotropical ecosystems, but comprehensive assessment of their effects on ecosystem functions is lacking. We reviewed the literature and used our own recent findings to identify knowledge gaps develop framework quantify leaf‐cutter processes. disturb soil structure during nest excavation changing aeration temperature. They mix relatively nutrient‐poor from deeper layers with upper organic‐rich increasing heterogeneity carbon nutrients...
Riding the global waves of decriminalization, medical or recreational use cannabis (Cannabis sativa spp.) is now legal in more than 50 countries and U.S. states. As governments regulate this formerly illegal crop, there an urgent need to understand how may impact environment. Due challenges researching quasi-legal commodities, peer-reviewed studies documenting environmental impacts are limited, slowing development policies agricultural extension guidelines needed minimize adverse outcomes....
The environmental behavior of fuel oxygenates (other than methyl tert-butyl ether [MTBE]) is poorly understood because few data have been systematically collected and analyzed. This study evaluated the potential for groundwater resource contamination by hydrocarbons (FHCs) (e.g., alcohol [TBA], tert-amyl [TAME], diisopropyl [DIPE], ethyl [ETBE], MTBE) examining their occurrence, distribution, spatial extent in beneath leaking underground tank (LUFT) facilities, focusing on from over 7200...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparison of Intraparticle Sorption and Desorption Rates for a Halogenated Alkene in Sandy Aquifer MaterialThomas C. Harmon Paul V. RobertsCite this: Environ. Sci. Technol. 1994, 28, 9, 1650–1660Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Published inissue 1 September 1994https://pubs.acs.org/doi/10.1021/es00058a017https://doi.org/10.1021/es00058a017research-articleACS PublicationsRequest reuse...
To study cerebellar activity during learning, we made whole-cell recordings from larval zebrafish Purkinje cells while monitoring fictive swimming associative conditioning. Fish learned to swim in response visual stimulation preceding tactile of the tail. Learning was abolished by ablation. All showed task-related activity. Based on how many complex spikes emerged swimming, they were classified as multiple, single, or zero spike (MCS, SCS, ZCS) cells. With MCS and ZCS developed increased...
Study region: Malibu Creek and Ventura watersheds, California, USA.Study focus: Fires significantly alter how watersheds respond to precipitation, leading increased runoff rates heightened sediment loads. We used the Soil Water Assessment Tool (SWAT) analyze discharge Our assessment compared Woolsey Thomas Wildfire episodes on loads generated from burned unburned areas within watersheds. New hydrological insight for Following Wildfire, surged between 2.1 5.2 times, while escalated by 1.9...
Water quality monitoring is essential for identifying risks to environmental and human health. Nitrate of particular importance, as its anthropogenic point nonpoint sources are common globally have deleterious effects on water usability well aquatic ecosystem Standard methods assessing nitrate concentrations in generally involve laboratory techniques, available field testing face significant tradeoffs between cost, precision, portability. Given relatively ubiquitous nature the widespread...
Wireless sensor networks (WSNs) are a relatively new and rapidly developing technology; they have wide range of applications including environmental monitoring, agriculture, public health. Shared technology is common usage model for adoption in countries. WSNs great potential to be utilized as shared resource due their on-board processing ad-hoc networking capabilities, however deployment requires that the technical community first address several challenges. The main challenges include...
Soil contains vast ecosystems that play a key role in the Earth's water and nutrient cycles, but scientists cannot currently collect high-resolution data required to fully understand them. In this paper, we present Suelo, an embedded networked sensing system designed for soil monitoring. An important challenge Suelo is many sensors are inherently fragile often produce invalid or uncalibrated data. Therefore assisted system: it actively requests help of human when necessary validate,...
This study examined the effects of a sophisticated simulation-based task on students' learning course-related content, ability to deal with complex, open-ended problems, and attitudes toward Interactive Site Investigation Software (ISIS) course. Students were required conduct hazardous waste site investigation using simulation software designed specifically for ISIS simulated physical processes as well real-world engineering processes. Assessment student outcomes was based use...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Sensitive Nitrate Ion-Selective Electrode from a Pencil Lead. An Analytical Laboratory ExperimentTatyana A. Bendikov and Thomas C. Harmon View Author Information Department of Civil Environmental Engineering Center for Embedded Networked Sensing, University California, Los Angeles, CA 90095Cite this: J. Chem. Educ. 2005, 82, 3, 439Publication Date (Web):March 1, 2005Publication History Received3 August 2009Published online1 March 2005Published...
S oil organisms are the catalysts that link elemen- tal exchange among lithosphere, biosphere, and atmosphere.Understanding rates of these exchanges, sequestration elements within any pool, is becoming increasingly crucial to understanding soil processes sustainable management local linked global climate.Indeed, scaling may be single most difficult task in study ecological processes.The nutrient transformations take place on surfaces particles, roots, microbes must defined scaled up for...
ADVERTISEMENT RETURN TO ISSUEPREVFEATURENEXTThe WATERS Network: An Integrated Environmental Observatory Network for Water ResearchJAMI L. MONTGOMERY, THOMAS HARMON, CHARLES N. HAAS, RICHARD HOOPER, NICHOLAS CLESCERI, WENDY GRAHAM, WILLIAM KAISER, ARTHUR SANDERSON, BARBARA MINSKER, JERALD SCHNOOR, and AND PATRICK BREZONIKCite this: Environ. Sci. Technol. 2007, 41, 19, 6642–6647Publication Date (Web):October 1, 2007Publication History Published online1 October 2007Published inissue 1...
Increasing demands on water supplies, along with concerns about non-point source pollution, and quality–based ecological factors all point to the need for observing stream flow perturbations pollutant discharges at higher resolution than has been practical until now. This work presents a rapidly deployable Networked Infomechanical System (NIMS RD) technology spatiotemporal variability in hydraulic chemical properties across channels. NIMS RD is comprised of two supporting towers suspension...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation H. C. Gatos, A. J. Strauss, M. Lavine, T. Harmon; Impurity Striations in Unrotated Crystals of InSb. Appl. Phys. 1 October 1961; 32 (10): 2057–2058. https://doi.org/10.1063/1.1728333 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search...
Achieving water security for humans and ecosystems is a pervasive challenge globally. Extensive areas of the Americas are at significant risk insecurity, resulting from global-change processes coupled with regional local impacts. Drought, flooding, quality challenges pose threats, while same time, rapid urban expansion, competing demands, river modifications, expanding global markets water-intensive agricultural products drive insecurity. This paper takes social-ecological systems...
The experimental in situ aquifer biorestoration site at Moffett Field, California, is a small, confined, sand and gravel aquifer, interspersed with layers of silts clays. Laboratory sorption solids characterization studies were carried out on core material recovered from around the zone. Equilibrium (distribution coefficient Kd) nonequilibrium (effective pore‐diffusion Dp) parameters, estimated batch experiments, used one‐dimensional simulations breakthrough three halogenated organic...