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 27 for “"Water losses"”.
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The technique of plot study to determine soil losses and runoff under field conditions due to fertilizer treatment
… have conducted studies dealing with soil and water losses under a wide range of conditions, but no study has been conducted on plots under actual field cultural conditions. These investigations have been very valuable in that they have revealed much needed information but they have added very …
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An analysis of water consumption rates in agricultural irrigation systems
… a background for the discussion of the high water consumption rates found in irrigation systems which use projectile-type sprinkler heads, the history and evolution of irrigation systems is discussed. The effect of evaporation is studied as as explanation for the water losses, but it is found …
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Investigation factors contributing to the underperformance of Mbahela Irrigation Scheme that benefitted from the revitalisation of smallholder irrigation schemes programme
… individual plots. The study also investigated water losses from the water supply and infield canals. Poor water conveyance efficiency is also thought to have contributed to the failure of the irrigation schemes. The study was conducted at the Mbahela Irrigation Scheme. Two sets of data, …
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Active leakage management with bayesian networks
… implementation in most developing countries’ Water distribution systems (WDS’s) remain limited. This is attributed to some limiting challenges to leakage management faced by these WDS. Some of these include; financial constraints, poor record-keeping systems, and inadequate …
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Pressure-based leakage characterisation of bulk pipelines
Water losses in distribution systems are a huge problem internationally and also in South Africa where more than a third of the water entering the water supply networks is lost through pipe leaks. With water demand increasing due to population growth and urbanisation, water resources are under …
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Effects of Water Pipe Burst on water quality and non revenue water in Arusha city: a case study of AUWSA
Chronic water losses have been the hallmark of Tanzania especially AUWSA water management over the decades. The rapid growth of Tanzanian cities including Arusha City, coupled with increased volumes of water for irrigated agriculture and industry, has meant that there is much less water to go …
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Towards practical pressure-based leakage characterisation of water distribution pipes with a novel pipe condition assessment device
… as effective ways of mitigating and managing water losses in an age where water scarcity has become prevalent. To this end, several methods have been developed and suggested with different benefits and drawbacks The presently available leakage detection methods, however, fail to identify and …
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An experimental investigation of leakage flow paths in soil surrounding leaks in water distribution systems
Over the last few decades, water stress has been imminent in most municipalities around the world. The problem of water losses from pipelines is a major concern due to the increasing demands. Leakage is normally responsible for a large percentage of water losses in distribution systems and results …
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Analysis and design of an in-pipe system for water leak detection
Leaks are a major factor for unaccounted water losses in almost every water distribution network. Pipeline leak may result, for example, from bad workmanship or from any destructive cause, due to sudden changes of pressure, corrosion, cracks, defects in pipes or lack of maintenance. The problem of …
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Surface water and groundwater in a changing climate: applications of hydrogeophysics and trend analysis to understand hydrologic systems
<p>Water resources are being impacted by anthropogenic climate change worldwide, the nature and severity of that impact is determined by geographic position, local topography, underlying geology, and human influences such as land use, water availability, and water regulation. As global temperatures …
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An Assessment on the Impacts of Employees Ethical Conducts to Organization Performance
… Major failures were observed in the areas of water losses, collection efficiency, and water pressure to customers. This unstable performance of public organizations in Tanzania particularly DAWASCO and the increased reports on unethical conducts by respective employees create a question as to …
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Opuntia ficus-indica: a climate-resilient biomass feedstock for low-input drylands agriculture
… fatty acids in cutin that might help to reduce water losses through the cuticle. A metabolic study using well-watered and water-deficit stressed mesophyll and epidermis tissues identified numerous responses to an oxidative environment including high tryptophan, raffinose family oligosaccharides, …
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Antifreeze Peptides and Glycopeptides in Polar Fishes
… osmolalities which are lower than that of sea water. As a result of being hypoosmotic to sea water, marine fishes are faced with a continuous osmotic loss of water. To replace osmotic and urinary water losses, marine fishes drink sea water and absorb salts and water from the intestine. In …
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The kinetics and mechanisms of the oxidation and precipitation of iron : the high density sludge (HDS) process
… in the treatment of hydrometallurgical waste water and acid mine drainage (AMD) by the high density sludge process (HDS). The removal of other pollutants by adsorption and coprecipitation using this technique depends on the nature and the process by which iron is removed. Although this …
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Experimental investigation of leakage-induced pipe erosion outside of pipe leaks
The problem of water loss from water distribution systems is an issue that faces municipalities worldwide. A large proportion of water loss is a result of leakage. With increasing water scarcity across the globe, it is imperative to conserve water resources, and hence reduce leakage in water …
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The Effect of Physical Activity Levels on Hydration Markers in Non-Athletic Free-Living Individuals
… requires increased fluid intake due to increased water losses via sweating. PURPOSE: To determine the effect of physical activity on hydration status and water intake. METHODS: This study involved 8 visits to the Human Performance Laboratory over 22 days. Body weight and urine measurements were …
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The role of the endogenous opioid system in thermoregulation during exercise
… parameters were measured during the test. Water loss was calculated from differences in nude body weight. In part II eight male subjects performed a graded maximal cycle ergometer test after receiving either placebo or 2mg naloxone in a randomized double-blind crossover fashion. Rectal and …
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The relationship between consumer demand and pressure in a selected pressure managed zone in Cape Town
Water is a basic need and a limited resource across the world. Climate change, pollution, population growth, irrigation and urban development, among others, contribute to the issues faced with respect to availability of quality of water resources and security of water supply for consumption. …
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The Development of a Hydrological Buffer Zone Strategy for Designating the Mesotope Protection Zone of Raised Mire Systems
… those areas around the bog margins within which water tables need to be managed. Undesirable water losses resulting from damage to peripheral lagg fens that would once have surrounded intact mire systems will be associated with a steepening change in hydraulic gradient. Although steep hydraulic …
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The assessment of water supply system efficiency and water quality in Standerton, Lekwa Municipality, Mpumalanga, South Africa
… face significant challenges in managing their water treatment plants effectively, often due to a lack of technical expertise, insufficient staffing and poor maintenance planning. These result in poor water quality, frequent supply interruptions and failure to comply with regulatory standards. …
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