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High-Frequency Nitrate Monitoring in Dynamic River Systems: the Case of Three Iowa Rivers in the Mississippi BasinBanerjee, Malini De 01 July 2013 (has links)
High frequency water quality monitoring presents unique and unlimited opportunities of exploring spatio-temporal variation in water quality. Knowledge gained from analyzing high frequency water quality data can provide more clarity regarding transportation and processing of water constituents over time and space and scale. This study analyzes high frequency discharge, nitrate load and concentration data for three watersheds of different sizes - Cedar River Watershed, North Raccoon and Middle Raccoon. Each of these sites were monitored for 2-3 calendar years.
Sudden spikes in discharge, nitrate concentration and load data, also defined as "events" were analyzed in great detail to understand the patterns in event occurrence and event intensity. Smaller watersheds seemed to have sharper and "flashier" events compared to bigger watersheds. Nitrate concentration events were flatter in shape compared to discharge and nitrogen load events. The relationship between nitrogen concentration and discharge was found to be varying over time, unlike the relationship between nitrate load and discharge, which were almost perfectly correlated for most site-year combinations.
Based on more than 40,000 simulations, it was determined that high frequency water quality sampling is not only efficient in capturing minute spatio-temporal variations but can also capture nitrate exceedances to a greater degree. High frequency sampling was also associated with higher yield ratio in nitrate load estimates, not only during high flow periods, but also during the non-high-flow period.
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How can California Best Promote Electric Vehicle Adoption? The Effect of Public Charging Station Availability on EV AdoptionSingh, Viraj 01 January 2019 (has links)
To promote higher air quality and reduce greenhouse gas emissions, the Californian government is investing heavily in developing public charging infrastructure to meet its electric vehicle adoption goal of five million zero-emission vehicles on the road by 2030. This thesis investigates the effect of public charging infrastructure availability on electric vehicle adoption at the zip code level in California. The analysis considers other factors that may influence electric vehicle adoption such as education level, income, commute time, gas prices, and public transportation rate. The findings suggest that public charging infrastructure availability does significantly positively correlate with electric vehicle registrations. Linear regressions were run using data from the U.S Department of Energy Alternative Fuels Data Center, IHS Markit vehicle registration data, and the US Census Bureau. The findings support continued investment in public charging infrastructure as a means of promoting electric vehicle adoption.
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COAL, GLOBAL WARMING, AND THE CLEAN AIR ACTStewart, Terry L. 01 June 2014 (has links)
In the early 1990s many scientists claimed that there was a scientific consensus that the anthropogenic production of greenhouse gases was causing global warming. Carbon dioxide is produced in far greater quantities than other greenhouse gases. Over 80 percent of the carbon dioxide produced in the United States comes from coal-fired power plants. If global warming is a threat to the welfare and survival of future generations, the United States, as one of the greatest producers of greenhouse gases,has an obligation to reduce its production of these gases.
In order to determine the most effective way to reduce the production of greenhouse gases in the United States, this study examines recent efforts by the Clinton and Obama administrations to reduce greenhouse gas emissions from coal-fired power plants.The Clinton and Obama administrations were selected for this study because both administrations were Democratic, and both had avowed political agendas to reduce greenhouse gas emissions. For the first two years each administration enjoyed the support of Democratic majorities in both Houses of Congress, and they had similar political support for the remainder of their time in office.
This study will show that President Obama’s executive approach to reducing carbon dioxide emissions from coal-fired power plants has been more effective than the legislative approach of the Clinton administration. The study will indicate that a scientific consensus about anthropogenic global warming and the political will to reduce greenhouse gas emissions from coal-fired power plants did not exist during the 1990s. The study also shows that, despite the effectiveness of the Obama administration in reducing carbon dioxide emissions, there are many problems with the executive approach to the problem. The study suggests that the Clean Air Act has ceded to much legislative power to the Executive branch of government, and that success in reducing carbon dioxide emissions from coal-fired power plants is too dependent on the will of the Executive.
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Identifying Cultural Themes in a Shared Experience of Water Hygiene Education PartnersEtheridge-Criswell, Sarah M 01 January 2015 (has links)
Lack of safe drinking water and lack of water hygiene literacy contribute to a large disease burden in rural areas of Africa, and children suffer disproportionately more than adults from diarrheal diseases caused by nonpotable water. Research is needed to help merge education and water sanitation to provide more effective methods of preventing diarrheal diseases. The ecological model and hygiene improvement framework were used to guide the study. The purpose of this phenomenological study was to describe the shared experiences of people participating in the water hygiene education program provided by Lifewater International. Lifewater is a nonprofit organization focused on improving access to clean water and increasing water hygiene literacy in rural parts of developing countries. Individual interviews were conducted with six Lifewater program participants, using the Delphi sampling technique. After I transcribed and thematically analyzed data for codes, three main themes were identified that motivated Lifewater partners and members of their community to change behavior: improving their children's health, saving time and money, and being a better Christian. The most meaningful part of participating in the program is that they use the information to improve the lives of those in their communities. In addition to making curricula for the Lifewater organization and its partners more streamlined, if the lessons are more culturally relevant, people are more likely to accept the behavior changes being taught, which can also influence the behavior change. Culturally relevant curriculum could help increase the access to and knowledge of clean water in developing areas, which contributes to the United Nation;s Millennium Development Goals, and thus promotes social change.
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Characterization of Section 404 Permit Mitigation Plans, Coastal Margin and Associated Watersheds, Upper Texas CoastConkey, April A. 14 January 2010 (has links)
A predicted loss of agricultural rice-wetlands and increasing urbanization and development threatens the remaining freshwater wetlands along the upper Texas coast. To avoid, minimize, and mitigate wetland loss, the U.S. Army Corps of Engineers (Corps) is directed to enforce Section 404 of the Clean Water Act (1975 amendment) by administering permits for development. Furthermore, a 1990 Memorandum of Agreement (MOA) between the Corps and the U.S. Environmental Protection Agency (EPA) proposed a national goal of no net wetland loss (NNL). My goals were to identify the frequency of occurrence of freshwater wetland loss due to dredge or fill, assess final plans to mitigate wetland loss, and verify the persistence of the created compensatory wetlands. I created a database of 96 individual, Section 404 permits issued from 1981 to 2001 in the counties of Chambers, Hardin, Jefferson, Liberty, Montgomery, Orange, and San Jacinto (Galveston District Office, U.S. Army Corps of Engineers). Descriptive statistics were calculated for permit characteristics in relation to issue date (pre- or post-NNL). Public comments received from national and state agencies were rank ordered against mitigation plan type to determine Spearman's Rank Order Correlation Coefficient. Visual identification (via site visits and 1996 aerial photos) was used to validate compensatory wetland persistence. Shoreline protection of private property and oil and gas drilling (64% of permit applicants and 59% of impacts) had the greatest effect on wetland loss in the region, particularly Chambers, Jefferson, and Montgomery counties. Overall, 79.3 ha of freshwater wetlands were gained; however, gain was overestimated due to large projects for habitat enhancement. Permits issued post-NNL were more likely to have formal mitigation plans (58% vs. 13% pre-NNL) and allowed no net wetland loss. Although agency comments recommending more formal mitigation plans increased after NNL, only a weak positive correlation was detected (Spearman's r less than or equal to 0.4). Six of seven created wetlands remained in existence through 2006 though they are freshwater ponds replacing more diverse aquatic systems. I recommend the development of a comprehensive method to track wetland loss, mitigation, and changes in watersheds over time.
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Clean development Mechanism (CDM) Policy and Implementation in ChinaZeng, Lei January 2006 (has links)
China is the second largest emitter of greenhouse gases (GHG) in the world. Since 68% of its primary energy is from coal, China’s average energy intensity is 7.5 times higher than the EU and 4.3 times higher than the US (EU, 2003). Therefore, introducing advanced clean technologies and management to China represents opportunities for Annex I countries to obtain low-cost CERs through CDM projects, and access to one of the largest energy conservation markets in the world. The Chinese government considers that the introduction of CDM projects can bring advanced energy technologies and foreign investment to China, thereby helping China’s sustainable development. As energy efficiency is generally low and carbon intensity is high in both China’s energy supply and demand sectors, numerous options exist for cost-effective energy conservation and GHG mitigation with CDM. This study has focused on the following areas: Clean development Mechanism (CDM) Policy and Implementation in ChinaClean development Mechanism (CDM) Policy and Implementation in ChinaChina’s energy development strategy and climate change, how to make CDM work for sustainable development in China? CDM projects in China: policies assessment and recommendations for improvement. Energy efficiency CDM projects and renewable CDM projects in China: case studies Firstly, this thesis reviewed the current CDM developments in China, attentions were given to the renewable energy, energy efficiency and methane capture project opportunities in China. Secondly, this study introduced China’s current policy on CDM implementation, and reviewed its permission requirements, institutional arrangements and project procedures. Based on the observations, this study analyzed the current problems and pointed out the shortfalls of the existing Chinese CDM policies and institutional settings. Options to remove these barriers were given as recommendations. This thesis also looked at the problem of that CDM was designed to have double dividends, to reduce the compliance cost of the Annex I countries and to contribute to sustainable development in Non Annex I Parties, but in reality, CDM has caused concerns about whether it could really support sustainable development in host countries. This study analyzed the reasons underpin this problem. Thirdly, based on the analysis made on energy efficiency and renewable CDM project development in China, case study was given on China’s landfill gas to energy project. This study analyzed the perspective of GHG mitigation through landfill gas capture and utilization in China, its opportunities and challenges. Moreover, this study demonstrated how CDM can add value to landfill gas-to-energy projects in China.
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Clean Development Mechanism - Key to the future? : A minor field study of organizations working in rural areas in Vietnam with renewable energy sources.Ewerton, Maria, Åkerblom, Linus January 2010 (has links)
A scholarship from the Swedish International Development Cooperation Agency (SIDA) made it possible for the authors to collect primary data on location in Vietnam. Through a study of three organizations we aimed to create an understanding of the Clean Development Mechanism. Despite all the natural resources and the potential of renewable energy in Vietnam, a large percent of the electricity production comes from coal and other sources that contribute to carbon dioxide emissions. However, there are organizations working nationwide with implementing renewable energy projects and educating the Vietnamese. Since the birth of carbon market in connection with the Kyoto Protocol new possibilities have emerged as e.g the Clean Development Mechanism. For example high quality carbon offsetting companies are working on projects that reduce greenhouse gas emissions. The purpose of this thesis is to study and describe how three organizations are working with renewable energy in rural areas in Vietnam and their connection to Clean Development Mechanism. We have carried out an explorative study with an inductive approach. Our three semi-structured interviews were conducted as personal interviews at location in Vietnam. We also had two informative meetings, also in Vietnam. Beyond, we had e-mail correspondents with a number of professionals in their field. Due to the heavy bureaucracy the Governmental process rate is slow, which are making projects such as in the area of renewable energy difficult to initiate. Also the Governmental interest in renewable energy as a source of generating electricity is limited. However, new policies are on the agenda which might increase the support for organisations working towards a sustainable development.
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Industrial cleaning with Qlean Water : a case study of printed circuit boardsLindahl, Mattias, Svensson, Niclas, Svensson, Bo, Sundin, Erik January 2013 (has links)
Many manufacturing companies are looking for ways to substitute environmentally problematic cleaning methods for surface treatments with more environmentally friendly ones. In this paper, one potential solution is described. The Qlean method, based on cleaning with highly pure water (in this paper defined as Qlean Water), is a novel cleaning method. This method, now utilized at one plant at a leading major international electronic company, has substituted previous chemical-based methods for cleaning printed circuit boards prior to lacquering. This paper presents, based on that company's primary data, a comparative study using environmental analysis and economic life cycle cost review between cleaning with Qlean Water and conventional cleaning. The focus is on the environmental and economic performance of the two alternatives. The conclusion is that Qlean Water offers both a significant economic and environmental cost reduction and a better product. This is the case even though all identified economic benefits derived from using Qlean Water, e.g. that the quality and technical lifetime have been extended for the printed circuit boards with the Qlean Water cleaning method, are not considered in the economic analysis.
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Determinants of Green Power Purchases: An Analysis of the EPA's Green Power PartnershipHouseworth, Sean C. 01 January 2013 (has links)
This paper explores the factors that drive purchases of green power by private and public organizations. Using a cross-sectional analysis of participants in EPA’s Green Power Partnership, I explore whether state energy policies have motivated increased consumption of green power among these participating organizations. Additionally, I analyze economic and political variables by state to determine if certain factors contribute to an organization’s green power purchases. I find that state mandates on renewable energy production and lower premiums for green power lead to increased purchases of green power for members of the Green Power Partnership.
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Carbon Opportunities and Carbon Losses in the Peruvian Amazon: Farmers' Interests in the Offset BusinessSabelli, Andrea 15 February 2010 (has links)
Carbon-based forestry (CBF) projects for the carbon market have been proposed with the aim of mitigating climate change, enhancing forest cover and improving livelihoods in developing countries. Debate has ensued regarding the validity of applying market-based mechanisms to climate mitigation in the form of CBF activities. Through in-depth interviews and focus groups, this study explores the various stakeholders’ involvement in the development of CBF projects in the Peruvian Amazon and reveals how their interests influence the types of activities that are established. Farmers’ perceptions on the carbon trade are examined and it is demonstrated that the potential of earning a carbon credit may influence farmers’ current land management practices in favor for implementing reforestation or agroforestry systems on their terrain. Regardless, the number of obstacles and the preferences of stakeholders significantly limit the ability of small-scale farmers to access and benefit from the emerging market.
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