Thesis (MA)--University of Montana, 2009. / Contents viewed on December 18, 2009. Title from author supplied metadata. Includes bibliographical references.

Thesis (Ph. D.)--University of Tennessee, Knoxville, 2003. / Title from title page screen (viewed Sept. 23, 2003). Thesis advisor: R. Bruce Robinson. Document formatted into pages (xxi, 268 p. : ill. (some col.)). Vita. Includes bibliographical references (p. 196-206).

Thesis (M.S.)--Worcester Polytechnic Institute. / Keywords: drinking water; disinfectant; ultrasound. Includes bibliographical references (p.91-95).

Not available / text

This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.

The Nigerian Drinking Water Supply and Distribution Sector

In the wake of the growing dependence on small water treatment plants (SWTPs) in providing quality water to rural areas and the global burden of water borne diseases, this study sought to examine the efficiency of 55 SWTPs located in rural or peri-urban areas of Limpopo and Mpumalanga Provinces in order to gauge the safety of water supply for human consumption. The microbiological and physical parameters of raw water, treated water and water in the distribution systems were examined using standard methods. Management issues impacting on quality of water supply were determined by use of questionnaires and focus group discussions. Results obtained showed that the pH, turbidity, temperature and conductivity of the raw water in SWTPs studied in both provinces ranged between 6.46 to 9.05 pH units, 0.19 to 8.0 NTU, 15.4oC to 31.40oC and 44.40.4 μS to 108 μS respectively. Water quality compliance at point of use (treated water) according to the Department of Water Affairs and Forestry of South Africa guidelines in SWTPs studied in both provinces were 85% for faecal coliforms and 69% for total coliforms. In the distribution systems, TCCs, FCCs and HPCs were within recommended limits except for few SWTPs suggesting a possibility of inadequate treatment and this may represent post-treatment contamination and possible risk of infection from these water supply sources. Physical parameters were generally within the recommended ranges . In terms of administrative issues, some plant operators did not have adequate knowledge of the functioning of the SWTPs and most were unable to calculate chlorine dosage, determine flow rates or undertake repairs of basic equipment. Poor working conditions , frequent stock depletion of chemicals , lack of maintenance culture , lack of emergency preparedness and poor communication were also cited . The study has revealed that the microbiological quality of raw water was very poor but that water treatment was efficient in the majority of SWTPs studied in both provinces. Regular monitoring of microbial and physico-chemical parameters of water quality served by the different SWTPs to the population is recommended to gauge their safety for human consumption. Issues such as enhanced incentives and periodic training of plant operators, improved communication and conditions of service , periodic stock inventory and entrenchment of maintenance culture may be necessary to ensure sustained and efficient water distribution systems.

International disputes over access to water resources can act as a catalyst for conflict or cooperation amongst nations. In the case of Israel and the occupied West Bank, water conflict further exacerbates preexisting political tension, and yet a peaceful and equitable solution between these countries could spark further negotiation. Within this context, the Palestinian Hydrology Group conducted a water questionnaire amongst Palestinian households in the occupied West Bank in 2001. The aim of the PHG’s survey was to investigate which water management system would be the most suitable in terms of equity, cost-recovery, and long-term development of the resource. Ultimately the water pricing system that was recommended was an increasing block-tariff system, which prioritizes the delivery of necessary amounts of water used for basic needs amongst all users before further allocating water to other uses. However, most of the work conducted by the PHG was qualitative and based entirely on descriptive statistics. Analysis regarding the relationships between water pricing, water consumption, and water needs, and how these relationships change over different scales, was not present in the final report. The purpose of this thesis to continue the research conducted by the PHG by analyzing the water questionnaire database as a means to further advise and direct water services within the occupied West Bank. In order to discern relationships between seasonal patterns of water pricing and consumption, an in-depth analysis of that data was conducted. In addition, perceived water needs were also examined. This analysis was performed at a variety of scales, including amongst districts, average monthly income levels, and connection/non-connection to a water network. Results indicate that some districts in the occupied West Bank are comparatively under-serviced. The economically poor district of Jenin seems to be in greatest need of stabilized and equitable water resources, followed by Hebron, Nablus and Ramallah. It was also observed that those within lower income brackets bear a disproportionate share of pricing fluctuations and, not surprisingly, low consumption levels. Connection/non-connection to a water network indicates that not only is consumption amongst non-connected households significantly low, but also that the difference between perceived water needs and water consumption is much greater than amongst connected households. This thesis supports the PHG’s recommendation for an increasing block-tariff system, since regression analysis indicates inequitable distribution and pricing amongst districts and income levels.

No description available.

No description available.