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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
221

Evaluating the benefit-cost  ratio of groundwater abstraction for additional irrigation water on global scale.

Alam, Mohammad Faiz January 2016 (has links)
Projections show that to feed a growing population which is expected to reach 9.1 billion in 2050 would require raising overall food production by some 70 percent by 2050. One of the possible ways to increase agricultural production is through increasing yields by expanding irrigation. This study assesses the potential costs and benefits associated with sustainable groundwater abstraction to provide for irrigation.The feasibility of groundwater abstraction is determined using a combination of three indicators:groundwater recharge, groundwater quality (salinity) and sustainability (no depletion). Global groundwater recharge estimates used, are simulated with the Lund-Potsdam-Jena dynamic global vegetation model with managed lands (LPJmL). The cost of groundwater abstraction is determinedon a spatially explicit scale on global level at a grid resolution of 0.5°. Groundwater abstraction cost is divided into two parts: capital costs and operational costs. The potential benefit of increased water supply for irrigation is given by the water shadow price which is determined by using a Model of Agricultural Production and its Impact on the Environment (MAgPIE). The water shadow price for water is calculated in areas where irrigation water is scarce based on the potential increase in agricultural production through additional water and it reflects the production value of an additional unit of water. The water shadow price is given on a 0.5° grid resolution in US $/m3. Combining the cost of abstraction and the water shadow price, the benefit cost ratio is calculated globally on a spatially explicit scale to determine where investment in groundwater irrigation wouldbe beneficial. Finally, the results are analysed in global, regional and country perspectives. The results show that groundwater abstraction is beneficial for an area of 135 million hectares which is around 8.8% of the total crop area in the year 2005. Europe show the highest potential with an area of ~ 50 million hectares with a majority of the area located in France, Italy, Germany and Poland. Second is North America with an area of ~ 43.5 million hectares located in the Eastern states where the irrigation infrastructure is less developed as compared to the Western states. Sub-Saharan Africa shows a potential of ~ 15.4 million hectares in the Southern and Eastern countries of Zimbabwe, Kenya, Malawi, Tanzania, Ethiopia and some parts of South Africa. South Asia despite extensive groundwater extraction shows only a moderate potential of ~ 9 million hectares, mostly located in India whereas China shows almost no potential. This is due to extensive groundwater depleted areas which were removed from the analysis and low water shadow prices which made abstraction not beneficial. Well installation costs play an important role in developing countries in regions of Sub-Saharan Africa and South Asia, where a reduction in costs would lead to an increase in area by more than 30%. Subsidy analyses shows that substantial increase in crop land areas where a benefit cost ratio >1 takes place in India with subsidised energy prices but this effect is found to be negligible in Mexico. This study is, to the author’s knowledge, the first to assess the benefit cost ratio of groundwater abstraction on a global scale by determining spatially explicit abstraction costs. The results show that a great potential for groundwater abstraction exists in all regions despite problems of groundwater depletion due to disparity in distribution and development of groundwater resources. Energy subsidies and cheap well installation techniques are the two factors that could bring down the abstraction costs which are quite important in developing regions where farm incomes are low. Also, groundwater irrigation potential not only exists in arid areas of Africa and South Asia where irrigation is needed but also in humid areas of Europe and North America where groundwater irrigation can play an important role in building resilience to events of drought. However, it is essential to not to follow the path that has led to groundwater depletion in many parts of the world and develop this potential in a sustainable way through groundwater use regulations, policies and efficient technologies.
222

Bioenergy crop production's impact on water quality in the Mississippi River basin using the benefit transfer approach.

White, William Tillman 06 August 2021 (has links)
Biofuel production-driven land-use change in agricultural land can have impacts on ecosystem services. Since there is no planned mandate after the Renewable Fuel Standard, there are questions about what implications will future land-use changes have on water quality and how do water quality changes, resulting from potential bioenergy scenarios, affect changes in people's well-being? To answer these questions, I will estimate the value of the predicted changes in water quality under biofuel policy scenarios in counties inside the Mississippi River Basin. From this study, I found that as the percent of land-use changes increase across each county, water quality decreased. I also found that for every unit increase for the change in water quality index, the percentage of individuals' willingness to pay for a change in water quality would increase. The predicted willingness to pay for a change in water quality for a given household varied from -$72 to $143.
223

Developing a Genetic Linkage Map from an Intervarietal Cross of Serotypes A and D and the Analysis of the Costs and Benefits of Hybridization in Cryptococcus neoformans / Hybridation in Cryptococcus neoformans

Han, Xiaoyu 08 1900 (has links)
N/A / Thesis / Master of Science (MS)
224

Movement Preparation and Down Syndrome: The Costs and Benefits of Advance Information

Le Clair, David 05 1900 (has links)
This study attempts to resolve to what extent individuals with Down syndrome benefit from advance information provided visually, versus the same information provided verbally when performing a manual aiming task. Adults with Down syndrome and undifferentiated developmental handicaps, as well as control subjects without a developmental handicap, performed manual aiming movements to targets 10.5 cm. away. On a particular trial, subjects were cued about the specific movement either visually or verbally. The cue provided either 50% or 80% certainty. Nonhandicapped control subjects initiated and completed their manual aiming movements more quickly than subjects with mental handicaps. As well, individuals with Down syndrome were found to be slower and more variable in reaction time than individuals in the other mentally handicapped group when valid information was provided verbally but not when the cue was provide visually. These results provide support for the Elliott and Weeks (1990) model of biological dissociation. Specifically, the atypical hemispheric lateralization for speech perception exhibited by individuals with Down syndrome results in a disruption in communication between functional systems responsible for the processing of verbal langauge, and the organization of complex movement. / Thesis / Master of Science (MS)
225

Environmental valuation

Anand, Prathivadi B. January 2012 (has links)
Yes
226

Politics, Social Cost Benefit Analysis and Planners

Potts, David J. 08 1900 (has links)
No / The paper explores some of the political assumptions implicit in the use of social cost-benefit analysis, and the role of economic planners using this analysis. It is argued that the recent emphasis on income distribution in project planning techniques rests on questionable assumptions about the nature and intentions of governments. These techniques can be thought of as attempts to redistribute income ‘through the back door’. Some possible justification for the use of income distribution weights in project planning is given, but it is concluded that they are very much second best to direct macro-economic policies and popular participation in planning.
227

Forget the Weights, Who gets the Benefits? How to Bring a Poverty Focus to the Economic Analysis of Projects

Potts, David J. 06 1900 (has links)
No / This paper examines the way in which the distributional impact of projects has been treated in the cost±bene®t analysis literature. It is suggested that excessive emphasis has been given to the estimation of distribution weights in the context of single ®gure measures of project worth and that more attention should be paid to estimation of the distribution e ects themselves. If projects really are to have some impact on poverty it is important that some attempt is made to measure what that impact is. Such an attempt requires both systematic measurement of direct income e ects as well as the possibility of measuring indirect e ects where these are expected to be important. An approach is suggested in which direct measurement of income e ects can be adjusted using shadow price estimates to determine indirect income e ects. The approach is illustrated with the example of a district heating project in the Republic of Latvia.
228

Towards a collective understanding of Social Cost Benefit and Value

Nichols, Joanna E., Coldwell, Harriet, McIntosh, Bryan, Thornton, G. 03 1900 (has links)
Yes / Purpose – The purpose of this article is to argue that a common understanding of the terms social value, social cost benefit, social return on investment etc. would be useful for those seeking to engage with the topic in the fields of health, wellbeing and early family intervention Design/method/approach – The article considers a commissioned study delivered by the authors which reviews the literature pertinent to this field. Findings- The authors suggest that there is considerable confusion with regard to the meaning of terms which are used almost interchangeably in the fields of health, wellbeing and early family intervention. Originality/value – The authors put forward a model to provide consistency of meaning across three levels of interventions.
229

Evaluating Digital Public Services: a contingency value approach within three ‘exemplar’ sub-Sahara developing countries

Tassabehji, Rana, Hackney, R., Maruyama, Takao 2018 September 1917 (has links)
Yes / This paper considers recent field evidence to analyse what online public services citizens need, explores potential citizen subsidy of these specific services and investigates where resources should be invested in terms of media accessibility. We explore these from a citizen-centric affordability perspective within three ‘exemplar’ developing countries in sub-Saharan Africa. The World Bank and United Nations in particular promote initiatives under the ‘Information and Communication Technologies for Development’ (ICT4D) to stress the relevance of e-Government as a way to ensure development and reduce poverty. We adopt a ‘Contingency Value’ method to conceptually outline reported citizens willingness to pay for digital public services. Hence, our focus is mainly upon an empirical investigation through extensive fieldwork in the context of sub-Sahara Africa. A substantive survey was conducted in the respective cities of Addis Ababa (Ethiopia), Lagos (Nigeria) and Johannesburg (South Africa). The sample of citizens was drawn from each respective Chamber of Commerce database for Ethiopia and South Africa, and for Nigeria a purchased database of businesses, based on stratified random sampling. These were randomly identified from both sectors ensuring all locations were covered with a total sample size of 1,297 respondents. It was found, in particular, that citizens were willing to pay to be able to access digital public services and that amounts of fees they were willing to pay varied depending on what services they wish to access and what devices they use (PCs or mobile phones). / European Investment Bank under the EIB-Universities Research Action Programme
230

Socioekonomická analýza fungování úzce specializovaného sportovního zařízení / Socio-economic analysis of very specialized sports facilities

Bartošová, Kristýna January 2010 (has links)
This Master's Thesis aims to apply methods of investmets to project of very specialized sports facilities. It uses Cost Benefit Analysis, Criteria Indicators, Risk Analysis to assess costs and benefits of sports infrastructure project. The theoretical part deals with a sport infrastructure definition, methodological part provides theoretical basis of methods used in next practical part. This is the previously mentioned Cost Benefit Analysis, Risk Analysis, SWOT Analysis and Marketing Strategy. To define real situation, practical part contains also statistic data regarding sports facilities in the Czech Republic and government strategy documents, which serves as basis of sociological part of the analysis.

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