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Water Resource Management

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Theses/Dissertations

2013

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Articles 61 - 68 of 68

Full-Text Articles in Physical Sciences and Mathematics

Treatment Of Reverse Osmosis Brine With Advanced Oxidative Processes For Enhanced Phosphorus Removal, Petrease Patton Jan 2013

Treatment Of Reverse Osmosis Brine With Advanced Oxidative Processes For Enhanced Phosphorus Removal, Petrease Patton

Theses and Dissertations (Comprehensive)

Current regulations for sensitive receiving waters are approaching the limit of technology for phosphorus removal and improved methods are required. Existing methods target removal of the orthophosphate form of phosphorus, but to achieve low effluent limits other non-reactive (NRP) forms, such as condensed phosphate and organic phosphorus, must be removed as well. This could be accomplished by developing a quaternary step in wastewater treatment that utilizes reverse osmosis (RO) followed by advanced oxidation processes (AOP) on the produced brine (RO concentrate). The objective during advanced treatment is to convert NRP in the brine to reactive phosphorus for removal by traditional …

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Lidar Assessment Of Sediment Transport Related To The Removal Of The Marmot Dam, Sandy River, Oregon, Carl Daniel Matzek Jan 2013

Lidar Assessment Of Sediment Transport Related To The Removal Of The Marmot Dam, Sandy River, Oregon, Carl Daniel Matzek

All Master's Theses

Four Aerial LiDAR survey were used to examine the impacts of the 2007 removal of the Marmot Dam on the Sandy River, Oregon. Geomorphic Change Detection software was used to answer three project goals: 1) to investigate how the dam removal affected sediment distribution in the lower reach of the river, several km downstream of the dam, 2) to determine whether the pulse of sediment from the dam removal created a detectable, successive downstream accumulation of sediment through time, and 3) to assess the effect of natural high-flow events on the sediment distribution related to the dam removal. The results …

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The Relationship Between The Meaning Of Water And Sense Of Place : A Grounded Theory Study From Northern Thailand, Katesuda Sitthisuntikul Jan 2013

The Relationship Between The Meaning Of Water And Sense Of Place : A Grounded Theory Study From Northern Thailand, Katesuda Sitthisuntikul

Theses: Doctorates and Masters

The literature suggests that a subtle relationship exists for communities between the meaning of water and sense of place, making fertile ground for systematic investigation. The relationship has obvious importance in today’s world, where people’s reliance on water, and the need for reliable supplies, form part of a common discourse in natural resource management. Yet, there has been much less discussion of what water means to people, how it connects with peoples’ sense of place, and what that might mean for the way people interact with their surroundings. The methodology of constructivist grounded theory was therefore appropriate to investigate this …

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Evaluating Residential Satisfaction With An Innovative Dual Water Supply System In Water Sensitive Urban Development, Raju S. Dhakal Jan 2013

Evaluating Residential Satisfaction With An Innovative Dual Water Supply System In Water Sensitive Urban Development, Raju S. Dhakal

Theses: Doctorates and Masters

The Australian water industry is facing two major challenges: a rise in water demand due to a growing population and a decrease in rainfall availability due to a drying climate. This situation has triggered a re-evaluation of traditional water schemes and promoted consideration of alternatives for sustainable urban water management. One possibility is to replace drinking water usage in garden and outdoor irrigation with non-potable groundwater. This could save almost half of the water supplied in the residential sector, which is the biggest consumer of scheme water in most Australian cities. A major hurdle for the success of such fit-for-purpose …

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Inorganic Hydrogeochemical Responses To Fires In Wetland Sediments On The Swan Coastal Plain, Western Australia, David Blake Jan 2013

Inorganic Hydrogeochemical Responses To Fires In Wetland Sediments On The Swan Coastal Plain, Western Australia, David Blake

Theses: Doctorates and Masters

In the past decade the wetlands of the Swan Coastal Plain (SCP) region of Western Australia have been subject to increasing fire frequency and intensity. Whilst wetland sediment fires (also known as peat fires) on the SCP are not new phenomena, the increased frequency, duration and extent of combustion have been concomitant with an increase in urbanisation and reduction in average annual rainfall for the region. This has led to a decrease in ground- and surface-water levels which, in turn, has increased the susceptibility of the wetland sediments to ignition and combustion events. Increased wetland fire severity has resulted in …

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Understanding The Critical Role Of A Wetland In Maintaining The Ecosystem: A Case Study, Sushil Tuladhar Jan 2013

Understanding The Critical Role Of A Wetland In Maintaining The Ecosystem: A Case Study, Sushil Tuladhar

Dissertations and Theses @ UNI

Beaver Valley Wetland in north-east Iowa was studied to determine its functionality in filtering incoming contaminants from the surrounding agricultural fields. The study was conducted from May through November of 2011. Altogether 78 water samples (from 13 sites), 84 soil samples (from 14 sites), and some sediment samples were collected for chemical analysis. Heavy metals in three different soil categories, such as surface, 6” deep, and sediments were found to be at or below the acceptable concentrations, indicating no immediate concern for metal toxicity in the wetland environment. The chemical tracers that were used to study the sub-surface flow regime …

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Temporal Dynamics Of Nutrient Flux Across Hydrologic Unit Boundaries, Md. Aminul Haque Jan 2013

Temporal Dynamics Of Nutrient Flux Across Hydrologic Unit Boundaries, Md. Aminul Haque

Dissertations and Theses @ UNI

The study was done in Dry Run Creek watershed, a small sub-urban watershed in the northwestern part of Black Hawk County, Iowa. Different hydrologic units like, wetland, agricultural area, urban area, and stream channels were compared in terms of nutrient transport. Soil, surface water, and groundwater samples were collected from May, 2012 to October, 2012. Among the hydrologic units, agricultural land has the highest organic matter percentages, infiltration rate, soil nitrate, and total phosphorus. High infiltration rate and amount of nutrients in agricultural soil made those areas more vulnerable to vertical infiltration of pollutants. Agricultural and urban soils had similar …

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Investigation Of Drinking Water/Beverage Contaminants Within The Beverage Industry, Elizabeth Hobbs Jan 2013

Investigation Of Drinking Water/Beverage Contaminants Within The Beverage Industry, Elizabeth Hobbs

Theses

The impact of water resource quality has influenced the community worldwide. It is an on-going target for water suppliers to produce suitable drinking water and the beverage industry to provide suitable water for the production of beverages. This diligence will ensure the consumer is provided with a product safe for consumption. The research and analytical techniques explored in this thesis may be of benefit to the beverage industry for the monitoring of inorganic contaminants present in water and carbonated soft drinks. The occurrence of certain contaminants in drinking water has become a major issue in the water industry in recent …

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