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Underwater Optical Properties of Lake Texoma (Oklahoma-Texas) Using Secchi Disk, Submarine Photometer, and High-Resolution Spectroscopy (open access)

Underwater Optical Properties of Lake Texoma (Oklahoma-Texas) Using Secchi Disk, Submarine Photometer, and High-Resolution Spectroscopy

The underwater optical climate of Lake Texoma was measured at eleven fixed stations from August 1996 to August 1997. Secchi transparency and submarine photometry characterized seasonal and spatial values of secchi depth (SD), vertical attenuation coefficient (η''), and depth of euphotic zone (Zeu). Indices of Zeu:SD and η'' × SD were compared with universally applied values derived from inland and coastal waters. Turbidity explained 76% of the variation (p = 0.0001) of η'' among water quality parameters, including chlorophyll-α. Using a spectroradiometer, spectral signatures of chlorophyll-α and turbidity were located. Stations with low turbidity exhibited a distinct green reflectance peak around 590-610 nanometers, indicating presence of chlorophyll-α. Stations with high turbidity exhibited a reflectance peak shift towards the red spectrum, making it difficult to detect the chlorophyll signature. Derivative analysis of the reflectance signal at 590-610, and 720-780 nanometers allowed discrimination of this chlorophyll signature from those of turbidity (0.66 ≤ r^2 ≤ 0.99).
Date: August 1998
Creator: Rolbiecki, David A. (David Alan)
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Oral History Interview with William E. Moore, Jr., March 4, 1998

Access: Use of this item is restricted to the UNT Community
Interview with William E. Moore Jr., a Army WWII veteran from Temple, Texas, who was present at the attack on Pearl Harbor. Moore discusses his time in the Corps of Cadets at Texas A&M, assignment to 24th Division Artillery at Schofield Barracks, Hawaii, training and alerts, the attack at Wheeler Field and taking defensive positions around Oahu, and service afterwards.
Date: March 4, 1998
Creator: Meisch, Lisa & Moore Jr., William E.
Object Type: Book
System: The UNT Digital Library
Environmental Factors Influencing Chlorophyll-a Concentrations in Lake Texoma (open access)

Environmental Factors Influencing Chlorophyll-a Concentrations in Lake Texoma

An analysis of algal biomass measured by chlorophyll-a concentration in Lake Texoma was performed as a part of a monitoring program to develop baseline environmental data in order to detect the potential effects of engineered changes in chloride concentrations in the reservoir. This portion of the research project focused on two main research objectives. The first objective was evaluating the effect of sampling strategy on the ability to adequately reflect standing crop estimates and trends in algal biomass. Two sampling regimes utilizing replication of three versus ten samples were applied and then analyzed using a minimum detectable difference algorithm to determine the necessary magnitude of replication to represent the variation in the metric. Chlorophyll-a distribution was analyzed for zonation patterns expected in a river-run reservoir to establish the importance of representative sampling of river, transition and main lake zones of the reservoir for management decisions and trophic characterization.
Date: December 1998
Creator: Gibbs, Jennifer S. (Jennifer Sokolovic)
Object Type: Thesis or Dissertation
System: The UNT Digital Library
[Pangburn Family Videos, No. 26 - A Visit with Grandparents] captions transcript

[Pangburn Family Videos, No. 26 - A Visit with Grandparents]

This home movie documents a visit from grandmother and grandfather Pangburn in April 1998. The footage includes the drive from Texas to Oklahoma, a stop to look at longhorns at Fort Griffin, a visit to Geronimo's grave at the Apache Indian Cemetary in Fort Griffin, visiting at an unidentified home in Oklahoma, visiting the memorials at the site of the Oklahoma City bombing, a dog feeding her pups, riding a tractor and go cart, sitting in the cockpit of a Chinook helicopter, a dog laying with a skateboard, posing as a group for the camera, and driving back to Texas.
Date: {1998-04-24,1998-04-26,1998-04-30}
Creator: Pangburn
Object Type: Video
System: The Portal to Texas History
Oral History Interview with Robert Lee Mosty, March 9, 1998 (open access)

Oral History Interview with Robert Lee Mosty, March 9, 1998

Interview with Robert Lee Mosty, World War II veteran and owner/operator of a plant nursery in Center Point, Texas. Mr. Mosty tells stories from his service in WWII, including how his unit was one of the first to meet liberated prisoners of war, as well as how he was wounded and taken prisoner. He also discusses studying at A&M, his work for the National Park Service, and running a plant nursery in the 1920s.
Date: March 9, 1998
Creator: Witt, Gerald & Mosty, Robert Lee
Object Type: Text
System: The Portal to Texas History
[Flyer: Special Tribute to W.A.S.P.'s of World War II] (open access)

[Flyer: Special Tribute to W.A.S.P.'s of World War II]

Flyer to Women Airforce Service Pilot Members inviting them to the Spirit of Flight Air Show where they will be given a special tribute.
Date: 1998
Creator: Women Airforce Service Pilots (U.S.)
Object Type: Pamphlet
System: The Portal to Texas History