The Problem of the cause and control of tastes and odors in water supplies has been the subject of a great many investigations during the last half-century; however, many questions in this field remain to be answered. Theories relating to the cause of tastes and odors occurring in water are still rather numerous and, at present, only a few of them are compatible. Although several procedures have been employed for the eradication of tastes and odors from water supplies, none of them are completely successful.

No description available.

No description available.

Surface waters can be impacted by point and non-point source (NPS) pollution including stormwater culverts, runoff, and septic systems. It is important to develop water quality monitoring plans that can be implemented within resource constraints while still providing useful data. The goal of this research was to develop a sampling strategy to identify the impacts of point and NPS pollution on surface waters. This research incorporates water quality monitoring, land use data, precipitation data, and statistical modeling to improve understanding of pollutant impacts on surface waters. Research was conducted at a 152-acre private lake in western Massachusetts. Lake water samples were collected approximately twice per month over 12 months at ten sample locations selected to isolate land uses, including (1) shoreline samples adjacent to homes with septic systems, (2) shoreline samples at stormwater discharge sites, and (3) control samples at the lake influent, lake effluent, and a private beach. Sampling events included dry and wet weather conditions. Water samples were analyzed for physical, chemical, and microbiological parameters including: pH, conductivity, dissolved oxygen, turbidity, alkalinity, nutrients, anions, organic carbon, and microbial indicators (total coliform, E. coli, enterococci, male-specific and somatic coliphages). The data were statistically analyzed to determine how land use, season, and precipitation affect the risk of contamination to surface waters. Results indicated significant water quality variations by land use, season, and precipitation and identified important correlations between water quality parameters.

Thesis (M. Phil.)--University of Hong Kong, 2007. / Title proper from title frame. Also available in printed format.

No description available.

No description available.

Two types of linear random wave simulation methods are investigated; viz., (1) Deterministic Spectral Amplitude (DSA) and (2) Nondeterministic Spectral Amplitude (NSA). These linear simulations are extended to second-order in a perturbation expansion in the frequency domain by utilizing a Fast Fourier Transform (FFT). The nonlinear interaction matrix for waves in shallow-, intermediate-, and deep-water is also investigated. In shallow water, the nonlinear interaction matrix is not as well-behaved as it is in intermediate- and deep-water. The nonlinear interaction matrix is symmetrical with respect to its frequency indices. The value of this nonlinear interaction matrix may, therefore, be calculated only from two octants in the w[subscript m]-w[subscript n] in plane. Water particle kinematics are computed from the simulated sea surface by three different Transfer Functions; viz., (1) Linear Frequency Domain (LFD), (2) Hybrid Frequency Domain (HFD), (3) Ncnlinear Frequency Domain (NFD). Wave pressure forces on a circular cylindrical pile are computed at approximately the mid-depth location in the time domain by the Morrison equation using the Dean and Aagaard coefficients. The statistics of these wave pressure forces are derived by the moment generating function approach by assuming that the initial sea surfaces are linear and Gaussian. The statistics of these simulated sea surfaces and wave pressure forces are compared with those recorded during Hurricane Carla (1961) in the Gulf of Mexico. In the sea surface simulation, the NSA method gives better agreement with the statistics from the measured sea surfaces than the DSA method does. However, there is no conclusion that can be drawn out the wave forces which are simulated from only one record (WPII No. 6887). / Graduation date: 1981

Thesis (doctoral)--Göteborgs universitet, 2005. / Includes bibliographical references.

Thesis (Ph. D.)--University of Missouri-Columbia, 2001. / Typescript. Vita. Includes bibliographical references (leaves 373-387). Also available on the Internet.