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Shoreline Erosion at Mad Island Marsh Preserve, Matagorda County, Texas

Shoreline Erosion at Mad Island Marsh Preserve, Matagorda County, Texas

Date: August 2005
Creator: Mangham, Webster
Description: The Nature Conservancy of Texas (TNC) is concerned with the amount of shoreline erosion taking place at its Mad Island Marsh Preserve (MIMP), located in Matagorda Bay, Texas. The MIMP is a 7,100 acre nature preserve that borders the Gulf Intracoastal Waterway and is eroded by waves generated by barge traffic. TNC is concerned that erosion will shorten Mad Island Bayou which may increase the salinity of Mad Island Lake; with detrimental effects on lake and marsh habitats. This study uses GPS technology to map the current shoreline and GIS to determine ten year erosion rates (1995 - 2005). Results show that erosion is occurring at various rates along the shoreline as well as along the oxbow bend in Mad Island Bayou.
Contributing Partner: UNT Libraries
Evaluation of City of Denton Sub-Watershed by Benthic Macroinvertebrate Field Experimental Approach

Evaluation of City of Denton Sub-Watershed by Benthic Macroinvertebrate Field Experimental Approach

Access: Use of this item is restricted to the UNT Community.
Date: August 2006
Creator: Mahato, Mahendra
Description: In this study, two different field experiments were designed to assess the relative influence of urbanization on benthic communities. During spring and summer, four urban and one reference sites from Denton County, Texas were selected for benthic macroinvertebrate evaluation. Statistically significant differences in colonized benthic macroinvertebrate taxa on artificial substrates were observed among the four urban sites and the reference site. Oligochaetes and chironomids were the dominant taxa at all sites. Identification of chironomid larvae at the subfamily and genus level to detect differences between sites had higher statistical power than the evaluation based on total chironomids. At the reference site, Caenis, Cladotanytarsus, Orthocladius, and Ceratopogonidae were the dominant taxa, while the urban sites were dominated by Dero, Physella, Ancylidae, Chironomus, Dicrotendipes, Glyptotendipes, Polypedilum, Pseudochironomus, Stenochironomus, and Tanytarsus. These differences may have been dependent upon differences in hydrologic regime and water quality between sites. Significant differences (ANOVA, p < 0.01) in water quality parameters (alkalinity, hardness, nitrates, phosphates, chlorides, sulfates, calcium, magnesium, potassium, and triazine) were found among water samples collected from the reference and urban sites. During the transfer period, most of the Ephemeroptera and Trichoptera taxa and a few other taxa disappeared from artificial substrates that were colonized ...
Contributing Partner: UNT Libraries
Soil and Forest Variation by Topography and Succession Stages in the Greenbelt Corridor, Floodplain of the Elm Fork of the Trinity River, North Texas.

Soil and Forest Variation by Topography and Succession Stages in the Greenbelt Corridor, Floodplain of the Elm Fork of the Trinity River, North Texas.

Date: August 2011
Creator: Rijal, Rajan
Description: The Greenbelt Corridor (GBC), located in a floodplain of the Elm Fork of the Trinity River, contains patches of bottomland forest and serves as part of Lake Lewisville’s flood control backwaters. This study examines forest structure and composition in relation to topographic position and forest stage in the GBC. Thirty two plots were surveyed within various stage classes, topographic positions, and USDA soil types. Trees were identified and measured for height and DBH. Density, basal area, and importance value for each of species was calculated. Soil and vegetation were analyzed using ANOVA, Principal Component Analysis, Canonical Correlation, Canonical Correspondence Analysis and Cluster Analysis. Tests confirmed that calcium carbonate and pH show significant differences with topographic positions but not with forest stage. Potassium shows no significant difference with soil texture class. Sand shows a strong negative correlation with moisture, organic matter, organic carbon and negative correlation with calcium carbonate and potassium. Silt shows positive correlation with moisture, organic matter, organic carbon, and calcium carbonate. Clay shows strong positive correlation with moisture, organic matter and organic carbon but negative correlations with pH. Swamp privet is dominant tree types in wetland forest. Sugarberry cedar elm, green ash and American elm are widely distributed ...
Contributing Partner: UNT Libraries
The proposed Fastrill Reservoir in east Texas:  A study using geographic information systems.

The proposed Fastrill Reservoir in east Texas: A study using geographic information systems.

Date: December 2009
Creator: Wilson, Michael Ray
Description: Geographic information systems and remote sensing software were used to analyze data to determine the area and volume of the proposed Fastrill Reservoir, and to examine seven alternatives. The controversial reservoir site is in the same location as a nascent wildlife refuge. Six general land cover types impacted by the reservoir were also quantified using Landsat imagery. The study found that water consumption in Dallas is high, but if consumption rates are reduced to that of similar Texas cities, the reservoir is likely unnecessary. The reservoir and its alternatives were modeled in a GIS by selecting sites and intersecting horizontal water surfaces with terrain data to create a series of reservoir footprints and volumetric measurements. These were then compared with a classified satellite imagery to quantify land cover types. The reservoir impacted the most ecologically sensitive land cover type the most. Only one alternative site appeared slightly less environmentally damaging.
Contributing Partner: UNT Libraries
Spanish Romantic Drama Sources of Giuseppe Verdi Operas

Spanish Romantic Drama Sources of Giuseppe Verdi Operas

Date: August 1972
Creator: Fleming, Leon O.
Description: The Italian composer of operas, Giuseppe Verdi, relied heavily on plays of the Romantic Era as sources for opera librettos. Three such plays were from the Spanish Romantic School: El trovador and Simon Bocanegra by Antonio Garcia Gutierrez, and Don Alvaro o la fuerza del sino by Angel de Saavedra, el Duque de Rivas. The operas which Verdi composed using these plays as sources--Il trovatore, Simon Boccanegra, and La forza del destino--range in popularity from near zenith (Il trovatore) to near nadir (Simon Boccanegra). The study attempts to assess the suitability of the three Spanish dramas as source material for operas, and to determine if this suitability is correlated to each opera's popularity.
Contributing Partner: UNT Libraries
Continuous Multifunctions

Continuous Multifunctions

Date: August 1972
Creator: Rulon, Susan Ree
Description: This paper is a discussion of multifunctions, various types of continuity defined on multifunctions, and implications of continuity for the range and domain sets of the multifunctions.
Contributing Partner: UNT Libraries
A Carcinogenic Agent Elaborated by Liver Cells from Lymphosarcoma-Bearing Mice

A Carcinogenic Agent Elaborated by Liver Cells from Lymphosarcoma-Bearing Mice

Date: August 1972
Creator: Blachley, Jon David
Description: Liver cells from lymphosarcoma-bearing DBA/1J mice were shown, by parabiotic culture with normal liver cells from isologous mice, to elaborate an agent which could pass a 25 mu filter and transform the normal cells to a malignant state.
Contributing Partner: UNT Libraries
Las Dos Fases Ideológicas en la Novela de Palacio Valdés

Las Dos Fases Ideológicas en la Novela de Palacio Valdés

Date: August 1972
Creator: Rodriguez, Aurora C.
Description: This thesis looks at the two idological phases of Armando Palacio Valdés' writings as manifested in his novels.
Contributing Partner: UNT Libraries
The Question of Restrictions on Travel to China: a Case Study in United States-China Relations (1948-1971)

The Question of Restrictions on Travel to China: a Case Study in United States-China Relations (1948-1971)

Date: August 1972
Creator: Smith, Bennie
Description: This study is concerned with the United States policy on restriction of travel to China and its effects on national and international politics.
Contributing Partner: UNT Libraries
Myth and History in Two Plays by Nicholas Rowe

Myth and History in Two Plays by Nicholas Rowe

Date: August 1972
Creator: Reedy, Mary Virginia Lee
Description: The purpose of this study is to examine two plays by Nicholas Rowe, eighteenth-century English poet, dramatist, editor, and translator, in order to ascertain their historical content, as opposed to their mythological and fictional content.
Contributing Partner: UNT Libraries