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Attitudinal and Relational Factors Predicting the Use of Solar Water Disinfection
Altherr, Anne-Marie
"Solar water disinfection (SODIS) is an uncomplicated and cheap technology providing individuals with safe drinking water by exposing water-filled plastic bottles to sunlight for 6 hours to kill waterborne pathogens. Two communities were visited, and 81 families (40 SODIS users and 41 nonusers) were interviewed. The relationship between several factors and the intention to use SODIS in the future and actual use were tested. The results showed that intention to use and actual use are mainly related to an overall positive attitude, intention to use is related to the use of SODIS by neighbors, and actual use is related to knowledge about SODIS; SODIS users reported a significantly lower incidence in diarrhea than SODIS nonusers. These results suggest that promotion activities should aim at creating a positive attitude, for example, by choosing a promoter that is able to inspire confidence in the new technology." Health Education & Behavior 2006, published online 17 November 2006 Available from: SAGE JOURNALS Online
Confronting limitations
Huang, Dong-Bin
"Despite continuous investment and various efforts to control pollution, urban water environments are worsening in large parts of the developing world. In order to reveal potential constraints and limitations of current practices of urban water management and to stimulate proactive intervention, we conducted a material flow analysis of the urban water system in Kunming City. The results demonstrate that the current efficiency of wastewater treatment is only around 25% and the emission of total phosphorous from the city into its receiving water, Dianchi Lake, is more than 25 times higher than its estimated tolerance. With regard to the crisis of water quantity and quality, the goal of a sustainable urban water environment cannot be attained with the current problem-solving approach in the region due to the technical limitations of the conventional urban drainage and treatment systems. A set of strategies is therefore proposed. The urban drainage system in Zurich is used as a reference for a potential best-available technology for conventional urban water management (BAT) scenario in terms of its low combined frequency of sewer overflow." Journal of Environmental Management, online since July 2006 Available online from: ScienceDirect
Características sociales, económicas y culturales que influyen en la adopción de métodos de innovación
Camargo López, Carmen Lucila
Master's Thesis, Universidad Mayor de San Simón, Bolivia Concretamente se realizo un estudio acerca de las características sociales, económicas y culturales, que influyen en la difusión y adopción de la innovación SODIS en familias de distritos de Cochabamba, Potosí, Oruro y Santa Cruz. Download
The Tha Chin River is Overloaded with Nutrients
Schaffner, Monika
"Increasingly intensive farming practices have led to a dramatic deterioration of water quality in the Tha Chin River in Thailand. One major problem is the high level of nutrients. According to our model – based on material flow analysis – intensive aquaculture accounts for a large proportion of the nutrient inputs." Eawag News 62d: 18-20. Download
Assessment of water quality problems and mitigation potentials by using material flow analysis
Schaffner, Monika
"Material flow analysis (MFA) is a promising tool for river water quality management. Based on orders-ofmagnitude estimations, the approach provides an overview of pollution problems and their dimensions in a river system, allowing to identify key sources and pathways of pollution, and to evaluate mitigation priorities. The current study aims at investigating MFA to assess river water quality problems and mitigation measures in developing countries, based on a case-study carried out in the Tha Chin River Basin (TRB), Thailand." Proceedings of the International Symposium on the Role of Water Sciences in Transboundary River Basin Management, Ubon Ratchathani (Thailand), 10-12 March 2005 Download PDF from: MekongBasinResearchNetwork
Modeling the contribution of point sources and non-point sources to Thachin River water pollution
Schaffner, Monika
Paper available at: http://www.sciencedirect.com/science/article/pii/S0048969709004628
Alarm – zu viele Nährstoffe im Tha Chin Fluss
Schaffner, Monika
"Mit zunehmender landwirtschaftlicher Intensivierung hat sich die Wasserqualität des Tha Chin in Thailand massiv verschlechtert. Ein enormes Problem ist der hohe Nährstoffgehalt des Flusses. Unser Stoffflussmodell zeigt, dass ein Grossteil der Nährstoffe aus der intensiven Fischzucht stammt." Eawag News 62d December 2006, pp. 18-20. Download
Applying a Material Flow Analysis Model to Assess River Water Pollution and Mitigation Potentials
Schaffner, Monika
PhD Thesis, University of Bern, Switzerland [...] With the current research, a Mathematical Material Flow Analysis (MMFA) is applied as an alternative approach to conventional river water quality models. Applied to analyze river water polllution, the MMFA allows to trace the pollution flows and their transformations from their input to the system as resource, through waste production, separation, treatment and finally to their outputs as product or as discharge into receiving water bodies. In this way, the perspective is widened to grasp the river system in an overview and to understand the origins and the main processes involved in the chain of nutrient pollution generation. The key parameters influencing the pollution flows are determined, based on which concrete and effective mitigation measures can be devised and evaluated. [...]
Factors from Diffusion of Innovations Theory Influencing the Adoption of Solar Water Disinfection
Heri, Simone
Master's Thesis, University of Zurich, Switzerland "In this study we examine a broad array of theory-based factors derived from diffusion research that influence the current use and intention to use of solar water disinfection (SODIS), a simple, low-cost technology for the treatment of drinking water on household-level. The perceived attributes of an innovation, the nature of the social system in which an innovation is diffused, the extend of change agents’ promotion efforts in diffusing the innovation and the nature of the communication channels were operationalized resulting in 16 variables to assess the use and intent to use of the innovation of SODIS. The aim of the study is to determine the influence of each factor and its predictive power. [...]" Download
Comparative Health Impact Assessments on Faecal Sludge Management Practices: A Case Study of Klong Luang Municipality, Thailand
Yajima, A., Yajima, A.
Tha Klong sub district with indiscriminate FS dumping and Klong Luang municipality were selected. In order to determine health risks due to faecal management practices , the quantitiative Microbial risk Assessment (QMRA) was conducted by using microbial data of E.Coli and Salmonella spp. The result shows that estimated mean values of yearly infection risks from accidental ingestion of canal water in various scanario were higher than acceptable risk defined by WHO. Download
Le réseau social des maraîchers à Abidjan agit sur la perception des préoccupations et des risques sanitaires liés à l’eau
Matthys, Barbara
"L'objectif de la présente étude conduite dans des zones de production maraîchère d'Abidjan, Côte d'Ivoire, était d'analyser les problèmes principaux des cultivateurs; leur perceptions des maladies et des risques sanitaires et la corrélation entre les risques sanitaires et le statut socio-économique des ménages ainsi que la cohésion sociale dans les communautés maraîchères. Les problèmes principaux sont l'insécurité foncière et de difficultés de commercialisation. Les préoccupations sanitaires sont la fatigue et l'insalubrité. En l'absence d'une éducation sanitaire fondée et des interventions localement adaptées, les cultivateurs n'accordent pas une attention particulière à la prévention des risques sanitaires. Le support technique, en concordance avec l'éducation et la communication de la prévention des risques sanitaires, promettent une augmentation de la productivité et une amélioration des moyens de subsistance des ménages cultivateurs à Abidjan." VertigO - la revue électronique en sciences de l'environnement 2006, hors série 3, Article 8 Download PDF from: VertigO
Situationale, personale und soziale Faktoren, welche die Absicht ein flussschützendes Szenario zu unterstützen, beeinflussen
Schnellmann, Ursula
Master's Thesis, University of Zurich, Switzerland The MSc thesis describes the factors influencing the preferences of different scenarios for the Tha Chin River in Thailand developed with Material Flux Analysis. The results show that the scenario views, the subjective social norms, the benefit aspects as well as the internal responsibility attribution are predictors of the intent of stakeholders to support specific scenarios for improvement of water quality. Download
Modelling the Water and Nutrient Flows of Freshwater Aquaculture in Thailand
Wittmer, Irene
Master's Thesis, Swiss Federal Institute of Technology Zurich, Switzerland "The Tha Chin River Basin (central Thailand) faces major water quality problems. Among others, freshwater aquaculture was identified to be one of the pollution sources. This study looks at nutrient loads coming from freshwater aquaculture systems in the area. A model based on a material flow analysis was set up to quantify the loads to canals and rivers as well as to identify the key factors (parameters) that influence the system. The focus was placed on four different major cultivation systems. For all four considered systems, the amount of feed and nutrient concentrations in feed have the highest influence on the nutrient loads to the canal. [...]" Download
Removal of Linear Alkylbenzene Sulfonate (LAS) from greywater by using constructed wetlands
Huynh, Thi Cam Hong
Master's Thesis at Asian Institute of Technology Download
Water Quality Assessment and Analysis in the Tha Chin River Basin, Thailand
Bieri, Franziska
The thesis investigates into the relation between river water quality, land-use and nutrient pollution processes in Tha Chin River Basin, and aims at obtaining a spatial and temporal overview on water quality. The results allow a preliminary identification of key parameters and priority areas for remedial actions. Download
Modeling the contribution of pig farming to pollution of the Thachin River
Schaffner, Monika
Rapid growth of the livestock production sector in South-East Asia during recent decades has led to a widespread degradation of ground and surface waters. The Thachin River Basin in Central Thailand serves as a case study for investigating the origins and pathways of nutrient loads produced by intensive pig farming. A mathematical material flow analysis is used to identify key nitrogen flows and the main parameters determining them. Scenarios of the potential for reducing these flows and achieving compliance with current discharge regulations are investigated. The results show that liquid waste discharged from large pig farms and directly discharged waste from small farms are the key nitrogen flows to the river system. The key driving forces are not only the treatment coverage and efficiencies but also the rate of reuse and recycling of the treated product. Paper available at: http://www.springerlink.com/content/l72t1878k2075942 Year of Publication: 2009