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The Chattahoochee River is an essential surface water source as it provides over 70 percent of Metro Atlanta’s drinking water, amounting to over 300 million gallons. In addition to serving as Metro Atlanta’s primary source of drinking water, the Chattahoochee River serves as a major point of discharge for industrial and municipal waste as well as urban runoff. The primary goal of this study was to assess the presence of Pepper Mild Mottle Virus in the Chattahoochee River. During a five-month period in 2014, water samples were collected at fifteen sample sites and two outfall sites in the Chattahoochee River. PMMoV was tested for in 6 out of 17 sample. A one-way ANOVA analysis (p<0.05), of concentrations across sampling locations resulted in a p-value of 0.044. As a result, it can be determined that the location of the sampling sites does result in a statistically significant difference in the PMMoV values observed. Furthermore, a one-way ANOVA analysis (p<0.05), of concentrations across sampling dates resulted in a p-value of 0.063. Therefore, it is determined that the dates on which sampling took place did not result in a statistically significant difference in the PMMoV values observed across time . Furthermore, the MS2 virus was also detected in these samples. Through a paired t-test (p<0.05), between the sample concentrations with and without MS2 presence, it was determined that there was no statistical difference in concentration of PMMoV when MS2 is present since p=0.0740 The results indicate that PMMoV was present in the Chattahoochee River due to the detection of PMMoV in the samples collected. However, additional investigations, using a larger sample size, are needed to assess PMMoV as a viable indicator of fecal contamination of ambient surface waters and recreational waters.

The multitude of data formats for storing river network, geometry, and flow data presents a challenge for the sharing of information both internally between software applications and externally between agencies. An analysis of existing software applications and data models used for one-dimensional hydraulic modelling of river systems was performed. The commonalities and differences between the model inputs were identified in order to determine the necessary characteristics of a common transfer language. A prototype transfer language was developed using Unified Modeling Language (UML) and implemented as an Extensible Markup Language (XML) schema. This prototype is intended to serve as a first step towards developing an international open standard to facilitate the sharing of hydraulic data. This work was performed in cooperation with the Consortium of Universities for the Advancement of Hydrologic Science, Inc. (CUAHSI) and the Open Geospatial Consortium/World Meteorological Organisation Hydrology Domain Working Group. / text

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As part of the effort to satisfy the ever increasing demand for a greater understanding of fluvial, hydrological, chemical, sedimentological and geomorphological processes operating on the floodplain, mathematical simulation models have come to play a significant role in the understanding, prediction and management of the floodplain environment. Underlying the accurate numerical representation of hydraulically driven processes is the provision of a suitable floodplain hydrology model which accounts for the interaction between surface hydraulics and subsurface hydrology. Such a numerical representation is currently not available at the spatial and temporal resolution required. It is the aim of this thesis to develop a novel conceptual approach to modelling floodplain hydrology in which the fundamental need to consider the interaction between surface and subsurface flow is the floodplain environment is addressed. This is achieved through the interactive coupling of a one-dimensional finite difference infiltration model with the state-of-the-art two-dimensional physically based finite element hydraulic model, TELEMAC2D. The coupled model provides an unparalleled spatial and temporal representation of surface and subsurface flow processes within the floodplain environment. The utility of this integrated approach is explored through an application of the model to two areas of contemporary floodplain research. In the first of these the model is run to assess the impact of infiltration on flood flow prediction for an llkm reach of the River Culm, UK, over a range of flood and soil conditions. In the second the model is run to investigate the nitrate buffering potential of floodplain riparian soils during flooding. For this investigation a model accounting for nitrate transport and denitrification is developed within the existing integrated hydraulic-infiltration model structure. An evaluation of the results from both of these investigations supports the need for a new approach to modelling fluvially driven floodplain processes which accounts for the spatially interactive nature of floodplain hydrology.

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No description available.