Pre-Impoundment Estimations of Nutrient Loading to Ray Roberts Lake and Prediction of Post-Inundation Trophic Status (open access)

Pre-Impoundment Estimations of Nutrient Loading to Ray Roberts Lake and Prediction of Post-Inundation Trophic Status

Excessive nutrient loading of natural and artificial lakes has led, in some systems, to plethoric algal and aquatic macrophyte growth which can result in aesthetic degradation and undesirable tastes and odors. It would be advantageous to have some indication of the potential trophic status of a reservoir before it is filled. An objective of this study was to assess the water quality and nutrient loading potential of the tributaries entering Ray Roberts Lake, a large reservoir located in north central Texas. Samples from a maximum of thirteen sites were collected on the Elm Fork, Trinity River, Isle duBois Creek, and five additional tributaries. Data were also collected during six storms, from atmospheric deposition collectors, and from soil-water microcosms. The relationship between watershed landuse and mean water nutrient concentrations was evaluated. Significant differences will exist between the two major arms of Ray Roberts Lake: Elm Fork, Trinity River and Isle duBois Creek. While the majority of the annual phosphorus and nitrogen load entering both tributaries is coming from overland flow, the proportion is higher in Isle duBois Creek. Point sources in the Elm Fork contribute a larger percentage of the bioavailable phosphorus, which is significantly greater than in Isle duBois Creek. …
Date: May 1988
Creator: Pillard, David Alan, 1958-
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Catalog of the University of North Texas, 1988-1989, Graduate (open access)

Catalog of the University of North Texas, 1988-1989, Graduate

The UNT Graduate Bulletin includes information about class offerings as well as general information about the university (academic calendar, admissions and degree requirements, financial information, etc.) about research, and about the colleges and schools on campus. Index starts on page 250.
Date: May 1988
Creator: University of North Texas
Object Type: Book
System: The UNT Digital Library
Perceptions of Self-Disclosure in Interpersonal Compliance-Gaining (open access)

Perceptions of Self-Disclosure in Interpersonal Compliance-Gaining

One hundred thirty-five undergraduate students were queried at North Texas State University. Perceptions of self-disclosure as a compliance-gaining tactic were surveyed. A fifteen item questionnaire was utilized. Fourteen questions were tested by an analysis of variance. One question was tested by chi-square. Data indicated that self-disclosure was viewed as an effective compliance-gaining tactic for both males and females; but females were perceived as more effective than males utilizing the tactic. Self-disclosure utilized as a compliance-gaining tactic was perceived as appropriate by both males and females. Results indicated females and males have similar perceptions regarding the appropriateness of utilizing the self-disclosure tactic. Male and female raters did not differ significantly from each other.
Date: May 1988
Creator: Vande Zande, Ann R. (Ann Rachel)
Object Type: Thesis or Dissertation
System: The UNT Digital Library