Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 124 for “"Available Water"”.
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Multi-temporal remote sensing for estimation of plant available water-holding capacity of soil
… are required to fulfill this demand. The Plant Available Water-holding Capacity (PAWC) is a key soil property in most agricultural management activities as it determines the maximum water that can be readily extracted by plants. Globally, there is an increasing demand for spatially explicit soil …
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The analysis of water availability indicators and access to available water in the developing, semi-arid, rural setting
… people did not have access to improved drinking water; the majority lived in the rural, water scarce regions of lesser developed nations. Global discussions of water scarcity had begun in the mid-1970’s, and over the following 30 years, several water availability indicators evolved to try to …
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Field and laboratory characterization of soil water desorption properties and comparison of plant available water for two Virginia soils
Soil water movement and desorption studies were conducted on two agriculturally important soil series. The soils selected were the Norfolk soil (a fine loamy, siliceous, thermic, Typic Paleudult) and the Cecil soil (a clayey, kaolinitic, thermic, Typic Hapludult). Water desorption properties were …
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Integrating water resources management : analysis of the St. Thomas, U.S. Virgin Islands, water market
… is to contribute to the understanding of the water resources management of the St. Thomas water market. By applying the framework for Integrated Water Resources Management, the actual water resources situation in the island was analyzed. This framework requires meeting three criteria: economic …
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Effects of Transplant Season and Container Size on Landscape Establishment of Kalmia latifolia L.
… tested the effect of container size on the water relations of pinebark substrate embedded in field soil. Two other experiments tested the effects of transplant season and container size on landscape establishment of nursery-produced mountain laurel. Experiment one compared volumetric water …
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The nitrogen cycle and ecohydrology of seasonally dry grasslands
… the organization of ecosystem traits with the water, carbon, and nitrogen cycles. Observations from a factorial irrigation-fertilization experiment in a seasonally dry annual grassland are combined with a simple ecosystem model to identify relationships between vegetation, nitrogen …
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Soil-Specific, Late-Season Nitrogen and Potassium Applications to Increase Corn Yields in the Mid-Atlantic Coastal Plain
… ranging from 0 to 112 kg ha-1. Additionally, water use of high yielding corn was measured, and historical weather patterns evaluated in an effort to predict the need for late-season fertilizer applications based on soil moisture. Grain yield was increased significantly by late-season N …
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Effect of reduced irrigation on grapevine physiology, grape characteristics and wine composition in three Pinot noir vineyards with contrasting soils
The effect of water stress on grapevine performance has been extensively studied in different wine producing regions around the world, but little has ocurred in New Zealand. Pinot noir is the second most planted variety in the country and the most planted in Waipara. An improved understanding of …
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Nutrient availability in mineral sand tailings amended with yard waste compost and wood ash
… the mine tailings were attributed to increased available water from the application of yard waste compost and to increased pH from the application of wood ash. Successful use of the yard waste compost and wood ashes for reclamation of the mine tailing is shown by the higher peanut yields on the …
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The development and application of analytical techniques for planning of irrigation systems
… techniques for assessment of irrigation water supply and demand are illustrated using a 140 x 75 km discrete element representation of the Canterbury Plain, New Zealand. A versatile soil moisture accounting model is developed and used to simulate soil moisture status throughout the Plain, …
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Economics of seawater desalination in Cyprus
… Some Cypriots believe that the main reason for water shortages is due only to low levels of rainfall (average rainfall in Cyprus is 500 mm per year, and less than 400 mm per year is considered a drought year). It is not disputed that this is part of the problem. However, my belief, along with …
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Factors required to enhance water recycling at two major Australian industrial manufacturing sites
… study presents the application of an integrated water management strategy at two large Australian manufacturing companies that are contrasting in terms of their respective products and wastewater generation. The integrated strategy, consisting of water audit, pinch analysis and membrane process …
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Evolution of water supply mechanisms to reflect changing values: a case study of the Massachusetts water management program
… localized demand and regional competition for water resources in parts of the eastern United States. Thus, some states have faced critical decisions concerning how to best manage their available water supplies. As fundamental public values have changed over time, public opinion concerning the …
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Assessment of Aquatic Invertebrate Communities of Tributaries of the Buffalo River, Arkansas, and Evaluation of Indices of Community Integrity
… river, but not evaluated on tributaries in the watershed. The purpose of this study was to evaluate the BRICI, comprised of 10 metrics, on tributaries in the Buffalo River watershed and then compare them to the Missouri Stream Community Index (SCI) that uses only four individual metrics. …
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Water Demand in the Chicago Metropolitan Area
… faces a legally de ned quota for the amount of water that it is allowed to pump from Lake Michigan. Separately, in Northeastern Illinois, the ground water level has fallen due to pumping pressure. Together, these constraints on water supply could limit economic and population growth in the …
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Modeling the flash gate board for water storage and flood control
… be designed low enough to prevent the reservoir water level from exceeding a flood plain during flooding conditions. Because of this constraint, much of the available water storage area is wasted and the available pressure head for power generation will be less than maximum during normal …
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Soil and plant water stress in an Appalachian oak forest: its relationship to topography and forest site quality
… was used to investigate soil moisture and plant water stress relationships on the southeast face of Potts mountain in Craig County, Virginia. Topographical effects on available water are especially pronounced during low late season rainfall levels encountered in the Ridge and Valley physiographic …
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Environmental policy in Jordan : analysis, gap identification, and strategies for improvement
… challenges are aggravated by the scarcity of available water, deterioration of the water resources, land contamination, desertification, mismanagement of land use, and air pollution. Attempting to describe the "State of the Environment" and to provide an informed analysis of the threats to the …
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Simulação do movimento de água no solo e sua variabilidade, considerando o efeito da evapotranspiração
The simulation of the movement of water in the soil constitute an useful tool in the studies of control and available water to the plants. However, the characteristics of the soil that involve the principal parameters of the models, exhibit a great variability along the area and depth. The present …
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