Physical Sciences and Mathematics Commons^™

Near Infrared-Red Models For The Remote Estimation Of Chlorophyll-Α Concentration In Optically Complex Turbid Productive Waters: From In Situ Measurements To Aerial Imagery, Daniela Gurlin

School of Natural Resources: Dissertations, Theses, and Student Research

Today the water quality of many inland and coastal waters is compromised by cultural eutrophication in consequence of increased human agricultural and industrial activities and remote sensing is widely applied to monitor the trophic state of these waters. This study explores near infrared-red models for the remote estimation of chlorophyll-a concentration in turbid productive waters and compares several near infrared-red models developed within the last 35 years.

Three of these near infrared-red models were calibrated for a dataset with chlorophyll-a concentrations from 2.3 to 81.2 mg m^-3 and validated for independent and statistically significantly different datasets with …

Water Infrastructure Challenges In Urbanizing Environments: A Case Study Of The 2009 Logan Canal Landslide, Kathryn Davis Henderson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In July, 2009 in Logan, Utah, a wet, steep hillside failed, leveling a home below and destroying an irrigation canal that ran along the hill. Three people were killed. The event and the resulting policy changes present an opportunity to uncover how frames, or social constructions, play into the policy development cycle. This case also uncovers the nuances involved when old infrastructure takes on new social meanings. Planners and policymakers that pay attention to frames and social dimensions may be able to minimize conflict.

The landslide received immediate media attention and spurred state legislation on canal safety. The event had …

Measured Rates Of D2 Abstraction In H2o+ , D2 Substitution In H2do+ And Charge Transfer Of He2+ With Noble And Other Gases At <1ev, Chrysanthos Kyriakides

UNLV Theses, Dissertations, Professional Papers, and Capstones

Experimental determination of the rate coefficient values of deuterium abstraction in water ions and deuterium substitution in hydronium ions can improve the understanding of D/H in water at planetary atmospheres, cometary atmospheres, and interstellar medium. Using a cylindrical ion trap, (CIT) and time of flight (TOF) mass spectrometry, a number of measurements at energies below 1 eV have been performed. The deuterium abstraction rate coefficient in water ions, H₂O⁺, and an upper limit for the hydrogen-deuterium substitution rate coefficient in monodeuterated hydronium ion, H₂DO⁺, have been measured. Both the abstraction and substitution …

Agenda: A Life Of Contributions For All Time: Symposium In Honor Of David H. Getches, University Of Colorado Boulder. School Of Law, University Of Colorado Law Review

A Life of Contributions for All Time: Symposium in Honor of David H. Getches (April 26-27)

On April 26-27, 2012, Colorado Law honored David H. Getches with a symposium to celebrate his life and legacy of trailblazing scholarship. “A Life of Contributions for All Time” featured a keynote address by Distinguished Professor Charles Wilkinson entitled, “Hero for the People, Hero for the Land and Water: Reflections on the Enduring Contributions of David Getches.” Top scholars in the fields of natural resources, water, and American Indian law reflected on Dean Getches’ contributions and their own insights into these fields, including Professor John Leshy, John Echohawk, Professor Carole Goldberg, Professor Joe Sax, Professor Rebecca Tsosie, Justice Greg Hobbs, …

Process-Evaluation Of Tropospheric Humidity Simulated By General Circulation Models Using Water Vapor Isotopologues: 1. Comparison Between Models And Observations, Camille Risi, David Noone, John Worden, Christian Frankenberg, Gabriele Stiller, Michael Kiefer, Bernd Funke, Kaley Walker, Peter Bernath, Matthias Schneider, Debra Wunch, Vanessa Sherlock, Nicholas M. Deutscher, David W. Griffith, Paul O. Wennberg, Kimberly Strong, Dan Smale, Emmanuel Mahieu, Sabine Barthlott, Frank Hase, Omar Garcia, Justus Notholt, Thorsten Warneke, Geoffrey Toon, David Sayres, Sandrine Bony, Jeonghoon Lee, Derek Brown, Ryu Uemura, Christophe Sturm

Faculty of Science - Papers (Archive)

[1] The goal of this study is to determine how H2O and HDO measurements in water vapor can be used to detect and diagnose biases in the representation of processes controlling tropospheric humidity in atmospheric general circulation models (GCMs). We analyze a large number of isotopic data sets (four satellite, sixteen ground-based remote-sensing, five surface in situ and three aircraft data sets) that are sensitive to different altitudes throughout the free troposphere. Despite significant differences between data sets, we identify some observed HDO/H2O characteristics that are robust across data sets and that can be used to evaluate models. We evaluate …

The Occurrence Of Illicit And Therapeutic Pharmaceuticals In Wastewater Effluent And Surface Waters In Nebraska, Shannon L. Bartelt-Hunt, Daniel D. Snow, Teyona Damon, Johnette Shockley, Kyle Hoagland

Daniel D Snow

Passive samplers were used to develop semi-quantitative estimates of pharmaceutical concentrations in receiving waters influenced by wastewater effluent. The occurrence and estimated concentration of twenty illicit and therapeutic pharmaceuticals and metabolites in surface waters influenced by wastewater treatment plant (WWTP) discharge and in wastewater effluents in Nebraska were determined using Polar Organic Chemical Integrative Samplers (POCIS). Samplers were installed in rivers upstream and downstream of treated WWTP discharge at four sites and in a discharge canal at a fifth location. Based on differences in estimated concentrations determined from pharmaceuticals recovered from POCIS, WWTP effluent was found to be a significant …

Slides: Natural Gas: Game Changer Or Runner Left On Base? Working To Get It Right In Co!, Gary Graham

Drawing the Blueprint for a Sustainable Natural Gas Future (January 18)

Presenter: Dr. Gary Graham, Director, Lands Program, Western Resource Advocates

21 slides

Sustainable Water Management In The University Of Texas At El Paso, Cora Martinez

Open Access Theses & Dissertations

This thesis showed how to improve water and financial savings for UTEP and El Paso by improving water conservation and sustainability of the UTEP campus. The goals of this research were successfully accomplished by focusing in three principal objectives.

1. Analyze historical data of water consumption of the UTEP campus for the past decade.

2. Evaluate water consumption to quantify water consumption by buildings and type of use, as well as provide recommendations for water and cost savings.

3. Synthesize a water management framework within the UTEP Facilities' Geographic Information System (GIS) for long-term monitoring and evaluation

Synthesis, Properties And Water Permeability Of Swnt Buckypapers, L J. Sweetman, L Nghiem, I Chironi, G Triani, Marc In Het Panhuis, St F. Ralph

Faculty of Science - Papers (Archive)

The ability of macrocyclic ligands to facilitate formation of dispersions of single-walled carbon nanotubes (SWNTs) was investigated using a combination of absorption spectrophotometry and optical microscopy. Vacuum filtration of aqueous dispersions containing SWNTs and various macrocyclic ligands (derivatised porphyrin, phthalocyanine, cyclodextrin and calixarene) afforded self-supporting membranes known as buckypapers. Microanalytical data and energy dispersive X-ray spectra were obtained for these buckypapers and provided evidence for retention of the macrocyclic ligands within the structure of the membranes. The electrical conductivities of the membranes varied between 30 ± 20 and 220 ± 60 S cm−1, while contact angle analysis revealed they all …

Are Competitive Effects Of Native Species On An Invader Mediated By Water Availability?, Tanya J. Mason, Kristine French, Ken Russell

Faculty of Science - Papers (Archive)

Question: Climate change processes could influence the dynamics of biotic interactions such as plant competition, especially in response to disturbance phenomena such as invasional processes. Are competitive effects of native species on an invadermediated bywater availability?

Location: Glasshouse facility, New SouthWales, Australia.

Methods: We constructed competitive hierarchies for a representative suite of species from coastal dune communities that have been invaded by the Asteraceae shrub, bitou (Chrysanthemoides monilifera subsp. rotundata). We used a comparative phytometer approach, where the invader species was grown with or without a suite of native species in glasshouse trials. This was used to construct competition hierarchies …

Comparative Microbial Sampling From Eutrophic Caves In Slovenia And Slovakia Using Rida ®Count Test Kits, Janez Mulec, Václav Krištůfek, Alica Chroňáková

International Journal of Speleology

RIDA®COUNT test plates were used as an easy-to-handle and rapid indicator of microbial counts in karst ecosystems of several caves in Slovakia and Slovenia. All of the caves had a high organic input from water streams, tourists, roosting bat colonies or terrestrial surroundings. We sampled swabs, water and air samples to test robustness and universality of the RIDA®COUNT test kit (R-Biopharm AG, Germany, http://www.r-biopharm.com/) for quantification of total bacteria, coliforms, yeast and mold. Using data from swabs (colony-forming units per cm²) we proposed a scale for description of biocontamination level or superficial microbial load of cave niches. Based …

Evaluation Of Soil Sustainability Along The Rio Grande In West Texas: Changes In Salt Loading And Organic Nutrients Due To Farming Practices, Christine L. Cox

Open Access Theses & Dissertations

Growing populations demand an increase in the amount of food being produced, which in turn, puts pressure on the productivity and sustainability of soils. The use of flood irrigation from the Rio Grande has greatly increased the salinity, sodicity, and enhanced leaching of nutrients in the Rio Grande Basin soils. To evaluate soil health, water and soil samples were collected from two pecan, one cotton, and one alfalfa field in western Texas. Each site was equipped with sensors to measure soil moisture, temperature, and electrical conductivity (EC), along with lysimeters at depths of 15, 30, and 60 cm to collect …

Technology Platform For Sampling Water With Electrolyte-Gated Organic Transistors Sensitised With Langmuiur-Deposited Calixarene Surface Layers., Delia Puzzovio, Abdullah Al Naim, Lee Hague, Mary Deasy, James P. Ward, Tim Richardson, Martin Grell

Articles

We demonstrate a technology platform that enables the development of new, surface-sensitised organic transistor sensors. We show that an organic semiconductor can still be gated by an electric double layer within the electrochemical window of water after the deposition of up to four Langmuir- Schäfer calixarene layers onto its surface. Since many calixarenes are known to selectively bind waterborne cations, this facilitates sensitising a conventional organic semiconductor with a physically deposited layer for specific cation recognition. When at least two Langmuir-Schäfer layers are deposited, these also block the electrochemical doping of the organic semiconductor, which otherwise competes with the field …

Temporal And Spatial Assessment Of Pahs In Water, Sediment, And Oysters As A Result Of The Deepwater Horizon Oil Spill, Meghan Christina Dailey

Electronic Theses and Dissertations

On April 20, 2010, BP's Deepwater Horizon oil rig exploded leaking over 200 million gallons of crude oil into the Gulf of Mexico for 84 days. Exposure to oil-associated polycyclic aromatic hydrocarbons (PAHs) in the water and sediment could severely impact the aquatic organisms inhabiting the Gulf of Mexico (i.e. developmental defects, reproductive effects, death, etc.). Therefore, water, sediment and oyster, Crassostrea virginica, samples were collected approximately bimonthly between May 26 and November 30, 2010 from multiple sites along the Gulf Coast, namely, two sites in Mobile Bay (Denton and Sand Reefs at 1 or 0.1 m above the bay …

Water Mass Balances For The Rio Grande/Bravo From Fort Quitman, Texas To Foster Ranch Near Langtry, Texas: An Assessment Of Factors, Ramiro Lujan

Open Access Theses & Dissertations

ABSTRACT

Water availability is declining in many regions of the planet, particularly in arid and semi-arid regions. Water bodies located in these regions, like the Rio Grande/Bravo at the U.S. - Mexico border, are subjected to high water demands. This research project makes an assessment of the spatial and temporal variability of elements intervening in the water mass balance for the section of the Rio Grande/Bravo between Fort Quitman and Langtry, Texas during the time period extending from January 1990 through December 2005. This document mentions the main Rio Grande/Bravo stakeholders from the U.S. and Mexico, and describes issues related …

Design And Implementation Of An Rf Data Communication System, Aung K. Soe

Honors Theses

Located just 8 miles northeast of Union College is Ballston Lake, a unique lake, which offers excellent research opportunities for faculty and students. The south basin of the lake is permanently stratified, and there has been no intermixing between water layers for thousands of years. The lower water layers contain no oxygen (anoxic). The Union College Geology Department is interested in a ten year study of Ballston Lake. Currently, there is no commercially available automatic system for collecting and transmitting data from a sensor package at the bottom of the lake to the lake shore and finally to Union College …

Effects Of Species, Water, And Nitrogen On Competition Among Three Prairie Grasses, Jerry L. Weatherford, Randall W. Myster

The Prairie Naturalist

We conducted an experiment to investigate effects of species, water (W), and nitrogen (N) on competition among little bluestem (Schizachyrium scoparium), sideoats grama (Bouteloua curtipendula), and indiangrass (Sorghastrum nutans). All biomass parameters and the root:shoot ratio of little bluestem were reduced by the presence off 1 of 2 other species, and its shoot biomass and total biomass were both increased by addition of N. Root and shoot biomass of sideoats grama were reduced by the presence of indiangrass and its total biomass was reduced by the presence of itself, whereas its shoot biomass was increased by addition of W at …

Slides: The Costs And Benefits Of Best Management Practices: Insights From The Marcellus Shale, Timothy J. Considine

Best Management Practices (BMPs): What? How? And Why? (May 26)

Presenter: Timothy J. Considine, School of Energy Resources, Department of Economics and Finance, University of Wyoming

15 slides

Slides: Master Development Plans (Mdps): Oil And Gas Projects, Mary Bloomstran

Best Management Practices (BMPs): What? How? And Why? (May 26)

Presenter: Mary Bloomstran, Edge Environmental

19 slides

Slides: Environmentally Friendly Drilling Systems Program, Rich Haut

Best Management Practices (BMPs): What? How? And Why? (May 26)

Presenter: Rich Haut, Houston Advanced Research Center

6 slides

Determination Of Selected Heavy Metals In Some Creeks In A Tennessee City., Ann Ejimole Item

Electronic Theses and Dissertations

Concentrations of Ni, Cu, Zn, Fe, Cd, and Pb were determined in six different creeks within a city in Tennessee using Atomic Absorption Spectrophotometer. Mean concentrations of Ni, Cu, Zn, Cd, Pb, and Fe in the sites examined reveal that they exceed the USEPA recommended limits. High concentrations of Cu (0.130 mg/L), Zn (13.7 mg/L), Ni (0.267 mg/L), and Cd (0.010 mg/L) were observed in site B and Fe (3.01 mg/L) in site E relative to other sites. The concentration of Pb (0.795 mg/l) was higher in site A. Higher concentrations of Cu, Zn, and Fe were detected in samples …

The Design And Construction Of A Microgravity Boiling Experiment, Troy Munro

Presentations

No abstract provided.

Slides: Adapting To Climate Change: Lessons Learnt From The Australian Water Experience, Will Fargher

Conversation with Water Management Reps from Colorado and Australia: "Adapting to Climate Change: Lessons Learned from Australia" (February 14)

Presenter: Will Fargher, National Water Commission, Australian Government

18 slides [4 have titles only and are missing images]

Numerical Evaluation Of Subsurface Soil Water Evaporation Derived From Sensible Heat Balance, Masaru Sakai, Scott B. Jones, Markus Tuller

Plants, Soils, and Climate Faculty Publications

A recently introduced measurement approach allows in situ determination of subsurface soil water evaporation by means of heat-pulse probes (HPP). The latent heat component of subsurface evaporation is estimated from the residual of the sensible heat balance. This heat balance method requires measurement of vertical soil temperature and estimates of thermal properties for soil water evaporation determination. Our objective was to employ numerically simulated thermal and hydraulic processes using constant or diurnally cycled surface boundary conditions to evaluate and understand this technique. Three observation grid spacings, namely, 6 mm (tri-needle HPP), 3 mm (penta-needle HPP) and 1 mm, along with …

Ab Initio Investigation Of Hydrogen Bonding And Network Structure In A Supercooled Model Of Water, Lei Liang, Paul Rulis, Lizhi Ouyang, Wai-Yim Ching

Mathematical Sciences Faculty Research

The hydrogen bond (HB) and network structure in a large periodic model of 340 water molecules are investigated by ab initio methods. This model has a density of 1.00 g/cc, very small distortions of O–H bond length and H–O–H bond angle, and the peak positions in the radial distribution functions in close agreement with experiment. The 340 molecules can be classified into four groups according to the number of HBs quantitatively determined by the bond-order values. The percentages of water molecules with two, three, four, and five HBs are, respectively, 3.2%, 10.3%, 85%, and 1.5%, with an average HB number …

Revisiting The Lower Stratospheric Water Vapour Trend From The 1950s To 1970s, H. K. Roscoe, K. H. Rosenlof

United States Department of Commerce: Staff Publications

Previous work showed a near-continuous increase in stratospheric water vapour between the 1950s and 1990s from a variety of instruments, without recourse to fits between instruments. We reassess the trend from the earliest, the UK frost-point hygrometer, 1954–1976. An error in previous work omitted to transform values from ppmm to ppmv. When corrected, they fit more convincingly with measurements by later frost-point hygrometers. Minor instrument changes between the 1950s and 1970s do not introduce a potential bias to the trend but do increase its error. If the full 1970s data are included, the trend becomes 2.1 ± 0.8%/year (two-sigma).

Microwave-Induced Indium-Catalyzed Synthesis Of Pyrrole Fused With Indoline In Water, Dina Abrego, Debasish Bandyopadhyay, Bimal K. Banik

Chemistry Faculty Publications and Presentations

An expeditious microwave-induced indium metal-catalyzed synthesis of pyrrole fused with indoline in water is developed by reacting isatin and 4-hydroxyproline.

Ordway Weather And Water Data 2011, Macalester College

Ordway Weather Data

Contains daily readings for the year indicated. The values include: PAR umol/s/m2, avg wind dir degree, avg windspeed mph, Avg Max Windspeed mph, Avg airtemp C, Avg RH %, Avg BP mmHg, Avg DailyRain in, Avg Rain Duration sec, Avg RainIntensity in/h, Avg Water Temp F, Avg sp cond mS/cm, avg pH, Avg Turb NTU+, Avg ODOSat %, Avg ODO mg/L, Water station PAR umol/s/m2, Avg Water Level m. File format: CSV.

How Well Do Predators Adjust To Climate-Mediated Shifts In Prey Distribution? A Study On Australian Water Pythons, Beata Ujvari, Rick Shine, Thomas Madsen

Faculty of Science - Papers (Archive)

Climate change can move the spatial location of resources critical for population viability, and a species resilience to such changes will depend upon its ability to flexibly shift its activities away from no-longer-suitable sites to exploit new opportunities. Intuition suggests that vagile predators should be able to track spatial shifts in prey availability, but our data on water pythons (Liasis fuscus) in tropical Australia suggest a less encouraging scenario. These pythons undergo regular long-range (to .10 km) seasonal migrations to follow flooding-induced migrations by their prey (native dusky rats, Rattus colletti ). However, when an extreme flooding event virtually eliminated …

The Water-Energy Nexus In The American West, Douglas S. Kenney, Robert Wilkinson

Books, Reports, and Studies

This digital resource contains only an abstract, cover image and table of contents information from the published book.

Print copy of book is available in the University of Colorado’s Wise Law Library: http://lawpac.colorado.edu/record=b613233~S0

Contents: PART I : INTRODUCTION AND OVERVIEW: The water-energy nexus : methodologies, challenges and opportunities / Robert Wilkinson -- Energy, water and the natural environment / Melinda Kassen, Jack E. Williams -- PART IIA : WATER FOR ENERGY : FOSSIL FUELS: The coal conundrum / Kristen Averyt -- Oil shale and water / Bart Miller -- Managing produced water from coalbed methane production / Lawrence J. MacDonnell, …