Abstract Water is the essential resource of people for their livelihood and is the foundation for the economy to develop unceasingly. Based on the trend of economic growth, population growth, and the improvement of the quality of life, the demand for water is expected to continuously increase. When the demand for water resources is continuing to increase, burdens are added to the environment and ecology. The severe challenge for human beings is how to promote the sustainable development of economy, society, an ecological environment, and to achieve sustainable use of water resources. The Penghu Island has endured water scarcity for a long time. The government also takes great pains over the water resource problem. The purpose of this study is to establish indicators of a framework for the sustainable development of water resources in Penghu County. This can be used to construct a model of the system dynamics to conduct simulations of various scenarios. After that, we can understand the current situation and problems of the subject of water resources and sustainable development in Penghu County to provide suggestions for the government to make decisions. First, literature should be collected that relates to the indicators of a sustainable development system of water resources, adopting the D-S-R (Driving forces-State-Response¡^indicator framework proposed by the United Nations. We should draw up a water resource sustainable development indicators system which suits the characteristic of the native environment in Penghu County initially, estimating by using Delphi and AHP. Moreover, we will construct a model of the system dynamics and proceed to do the simulation of scenarios. There are 43 indicators in this study which built up the D-S-R water resources sustainable development indicator framework in Penghu County. They belong to 8 different assessment categories, which include watershed conservation and management, groundwater conservation and management, diverse use and development of water resources, allocation and management of water resources, drought and flood mitigation, promotion of water conservation measures, technology research and develop of water resources, personnel training and education about cherishing water resources. Among them, there are 14 driving force indicators, 14 state indicators, and 15 response indicators. According to the dynamic system model constructed in this research, the continuous increase of the population and number of tourists represent the social and economic development of the driving force aspect. When the groundwater is overdrawn, this causes the seawater to invade and it becomes salty. The State aspect is and the people's health and welfare. In the Response aspect, there are 4 strategies regarding the management scenarios, including the control of overdrawn groundwater, building a seawater desalination factory, rational water price adjustment, and the promotion of water conservation measures are drafted. According to the simulation and scenarios, some results were found, such as the rational water price adjustment and promotion of water conservation measures have a limited effect upon slowing down the groundwater overdraw because of the severe water resource shortage in Penghu County. The control of overdrawn groundwater can appropriately decelerate the groundwater being drawn excessively, but can't retard the rise in demand for water. Building a seawater desalination factory can satisfy the continuous rise in demand for water, and have the greatest effect on decelerating the aggravation of the water resource ecology and the quality of the water environment. The strategy of improving the shortage of water resources usually can be executed from two directions: water resources development and economization. This study found that the key points to overcome in order to achieve the sustainable development of water resources in Penghu County are mainly: the destruction of the ecological environment because of deep groundwater overdraw, and the negative influence of setting up a seawater desalination factory on marine ecology resources. The relation is very clear that deep groundwater overdraw causes seawater invasion and the result is salty water. But it's not clear whether the waste water produced from the seawater desalination factory will effect the rich marine resources of Penghu County. The residents, mainly fishermen, still have doubts about building a seawater desalination factory. There should be more thorough analysis and research.

The Caloosahatchee River, located in Southern Florida, was originally a meandering and relatively shallow river. During the 1920s, the Caloosahatchee River was channelized and became the C-43 canal. The channelization has significantly impacted the river ecosystem, particularly the oxbows. The oxbows are the U-shaped water bodies on each side of the river channel, which are the remnant bends of the original river. To understand how anthropogenic influence affects hydrologic systems, the proposed case study was designed to assess the geomorphic changes of the oxbows of the Caloosahatchee River, Florida. Understanding and documenting the evolution of river morphology is becoming increasingly important today with increasing river degradation due to anthropogenic activities. In fact, such monitoring will provide critical information regarding river conditions to support future management plans and restoration efforts. Monitoring is a key element of successful management. This study provided a baseline for future monitoring by assessing the current morphologic conditions of the thirty-seven oxbows of the Caloosahatchee River, coupled with GPS data. Bathymetric surveys were used to assess the morphology of the oxbows. The study also presented trends in the evolution of oxbow morphology by comparing the data collected from the survey in 2011 with a cross-sectional survey collected by the South Florida Water Management District in 1978. The study revealed that 21 of 37 oxbows are still open; however, 16 are already partially filled, either at one of the ends or somewhere in the interior. In both 1978 and 2011, oxbows in Lee County were significantly larger, wider and deeper than in Hendry County. Exterior limb cross-sections were significantly larger, wider and deeper than interior cross-sections in both 1978 and 2011. Finally, an attempt to determine trends in the evolution of the morphology of the oxbows demonstrated that the overall maximum depth is significantly decreasing but only in the interior of the oxbow and that the mean depth is significantly increasing but only in the exterior cross-sections. This analysis also showed that the width is significantly increasing throughout the oxbow. Factors responsible for such differences may include natural geomorphic processes, pattern changes due to channelization, land use and anthropogenic activities.

Currently 884 million people worldwide are living without access to an improved source of drinking water (WHO/UNICEF, 2011). Piped-water on premises is the ultimate goal of World Health Organization (WHO) due to the ability to treat all of the water and distribute it safely in pressurized pipes. However, Household Water Treatment and Safe Storage (HWTS) is an option for improving the quality of drinking water where that infrastructure is not yet developed, especially where there is a risk of recontamination between point of collection and point of use (Clasen, 2006). This study analyzed one such HWTS, the ceramic pot water filter. The study compared the hydraulic properties of the FilterPure (FP) and Potters for Peace (PFP) ceramic pot filters through a thirteen-month field study in the Dominican Republic and laboratory studies at the University of South Florida. In the field study 55 filters were tested for first hour flow rate and hydraulic conductivity. Eight first hour flow rate tests were conducted in the field on one month intervals during months 7- 13. FP filters had an average first hour flow rate of 553 ml/hr and PFP Filters had a first hour flow rate of 395 ml/hr. No significant change in first hour flow rate was observed over time in FP filters. PFP experienced an average increase of 31 ml/hr per month during the seven-month testing period. Falling head tests were conducted on four filters in the laboratory and the flow rate was modeled to determine hydraulic conductivity. Hydraulic conductivity values for FP filters ranged from k = 0.0495 - 0.0831 cm/hr and for PFP filters ranged from k = 0.0136 - 0.0389 cm/hr. Eight out of 29 (26%) Potters for Peace filters in the field had first hour flow rates of less than 250 ml/hr by month nine of the study and had to be replaced and removed from the study. In total 24 of 55 (44%) filters (8 FP and 16 PFP) had to be removed from the study due to several reasons discussed in this thesis.

This report examines water supply planning issues in San Antonio, Texas. San Antonio is unique among large cities in the United States in that it relies almost exclusively on a single source, the Edwards Aquifer, for its water supply. Because San Antonio’s water demand is projected to outgrow the Aquifer’s capacity, the city must consider other options to extend and augment its current water supply. After describing the hydrogeology and water supply history of San Antonio, this report explains the multitiered water planning structure and current and future water needs for the city. It then studies and evaluates three short-to-mid term water supply options. By continuing to develop its already successful water conservation programs and water reclamation system, San Antonio can delay the need for more costly and environmentally impactful water supply options down the road, and wisely manage the resources it already draws from. / text

There is an urgent need for wastewater treatment plants (WWTPs) to adapt to a rise in water and energy demands, prolonged periods of drought, climate variability, and resource scarcity. As population increases, minimizing the carbon and energy footprints of wastewater treatment, while properly managing nutrients is crucial to improving the sustainability WWTPs. Integrated resource recovery can mitigate the environmental impact of wastewater treatment systems; however, the mitigation potential depends on various factors such as treatment technology, resource recovery strategy, and system size. Amidst these challenges, this research seeks to investigate the environmental sustainability of wastewater treatment plants (WWTPs) integrating resource recovery (e.g., water reuse, energy recovery and nutrient recycling) in different contexts (developing versus developed world) and at different scales (household, community, and city). The over-arching hypothesis guiding this research is that: Context and scale impact the environmental sustainability of WWTPs integrated with resource recovery. Three major research tasks were designed to contribute to a greater understanding of the environmental sustainability of resource recovery integrated with wastewater treatment systems. They include a framework development task (Chapter 2), scale assessment task (Chapter 3), and context assessment task (Chapter 4). The framework development task includes a critical review of literature and models used to design a framework to assess the environmental sustainability of wastewater treatment and integrated resource recovery strategies. Most studies used life cycle assessment (LCA) to assess these systems. LCA is a quantitative tool, which estimates the environmental impact of a system over its lifetime. Based on this review, a comprehensive system boundary was selected to assess the life cycle impacts of collection, treatment, and distribution over the construction and operation and maintenance life stages. Additionally, resource recovery offsets associated with water reuse, energy recovery, and nutrient recycling are considered. The framework’s life cycle inventory includes material production and delivery, equipment operation, energy production, sludge disposal, direct greenhouse gas (GHG) emissions, and nutrients discharged to the environment. Process-based LCA is used to evaluate major environmental impact categories, including global impacts (e.g., carbon footprint, embodied energy) and local impacts (e.g., eutrophication potential). This is followed by an interpretation of results using sensitivity or uncertainty analysis. The scale assessment task investigates how scale impacts the environmental sustainability of three wastewater treatment systems integrated with resource recovery in a U.S. context. Household, community, and city scale systems using mechanized technologies applicable to a developed world setting were investigated. The household system was found to have the highest environmental impacts due high electricity usage for treatment and distribution, methane emissions from the septic tank, and high nutrient discharges. Consequently, the life cycle impacts of passive nutrient reduction systems with low energy usage at the household level merit further investigation. The community scale system highlights trade-offs between global impacts (e.g., embodied energy and carbon footprint) and local impacts (e.g., eutrophication potential) where low nutrient pollution can be achieved at the cost of a high embodied energy and carbon footprint. The city scale system had the lowest global impacts due to economies of scale and the benefits of integrating all three forms of resource recovery: Energy recovery, water reuse, and nutrient recycling. Integrating these three strategies at the city scale led to a 49% energy offset, which mitigates the carbon footprint associated with water reuse. The context assessment task investigates how context impacts the environmental sustainability of selected community scale systems in both Bolivia and the United States. In this task, rural developing world and urban developed world wastewater management solutions with resource recovery strategies are compared. Less mechanized treatment technologies used in rural Bolivia were found to have a lower carbon footprint and embodied energy than highly mechanized technologies used in urban United States. However, the U.S. community system had a lower eutrophication potential than the Bolivia systems, highlighting trade-offs between global and local impacts. Furthermore, collection and direct methane emissions had more important energy and carbon implications in Bolivia, whereas treatment electricity was dominant for the U.S. community system. Water reuse offsets of embodied energy and carbon footprint were higher for the U.S community system, because high quality potable water is replaced instead of river water. In contrast, water reuse offsets of eutrophication potential were high for the Bolivia systems, highlighting the importance of matching treatment level to end-use application. One of the Bolivia systems benefits from the integration of water, energy, and nutrient recovery leading to beneficial offsets of both global and local impacts. This research can potentially lead to transformative thinking on the appropriate scale of WWTPs with integrated resource recovery, while highlighting that context lead to changes in the dominant contributors to environmental impact, appropriate technologies, and mitigation strategies.

Raindrop kinetic energy and sheet flow can disintegrate aggregates during interrill erosion, a process responsible for non point source pollution. Also, the dissolution process during aggregate wetting can affect interrill erosion. These factors can be responsible for changes in particle size distribution in the sediment, especially when different tillage systems are compared. The effect of soil tillage and management on soil properties is not uniform, which determine a wide range of runoff and sediment delivery rate. Variety in these rates can be associated with pore functions and their interactions with aggregate stability. One of the objectives of this study was to analyze the wetting behavior of soil aggregates from soils under conventional tillage compared with soils under no tillage. It was expected that the wetting rate is a function of pore system and that different tillage systems would affect the soil wetting behavior based on their impact on soil structure and shape. The second objective was to analyze the relationships among soil wetting rate, particle movement, organic carbon (OC) and iron release with the sediment produced via interrill erosion. A rainfall simulation experiment was performed in the field to determine the effect of low and fast soil wetting on total soil loss through high and low kinetic rainfall energy, sediment particle size distribution and OC loss. Two soils that differed in soil textural composition and that were under conventional and no tillage were investigated. Soil loss depended largely on soil characteristics and wetting rate. Particle size distribution of sediment was changed by treatment and the proportion of particles smaller than 0.053 mm increased over time, at any kinetic energy wetting level. Temporal OC and iron release were constant, which required a continuous source principally due to aggregate slaking. An empirical model was proposed to improve an interrill erosion equation by using a bond-dissolution mechanism that identified soil as a regulator of particle release.

The recent reform of potable water service provisioning by means of the promulgation of the Water Services Act 108 of 1997 and the National Water Act 36 of 1998 in South Africa has started a process of addressing the imbalance that existed in regard to how the national resource was being distributed. Water is now recognised as a scarce resource that belongs to all the people of the country. Consequently, it should be managed in an integrated way for social and economic development – including future growth (Fuggle & Rabie, 2005:293; Reimann, Chimboza & Fubesi, 2012:446). What is required is an attitude that incorporates a sensitivity in the careful cognisance and management of ―the aggregate of surrounding objects, conditions, and influences that impact on the life and habits of man, or any other organism or collection of organisms (South Africa, 1989). The provision of potable water by water services authorities (WSAs) is an important basic service that faces a number of challenges, such as the use of an outdated infrastructure, the lack of skilled and knowledgeable people, improper planning, and the booming population that places overt pressure on the demand for service delivery. This study was, therefore, undertaken to investigate how a municipality – which is forced to obtain its potable water supply from nearby surface and groundwater catchments, could manage this supply in a more effective, efficient, equitable, economic and sustainable manner by means of improved co-operative governance and intergovernmental relations. The key motivation was thus to develop a plan that would manage water resources more effectively on strategic, tactical and operational levels within government structures and to assist in realising integrated water resources management (IWRM). The proposed plan could be used to develop a shared vision for the Dr Kenneth Kaunda District Municipality (Dr KKDM) municipal area of responsibility; and to provide an overview of the strengths, weaknesses, opportunities and threats regarding the management of water resources. A qualitative research design was used to conduct the study, which included a literature review, semi-structured interviews, data sampling and scientific analysis of responses. Furthermore, a case-study approach was followed by the researcher, with Dr KKDM as the unit of analysis (the locus). / Thesis (Ph.D. (Public Management and Governance))--North-West University, Potchefstroom Campus, 2013.

The recent reform of potable water service provisioning by means of the promulgation of the Water Services Act 108 of 1997 and the National Water Act 36 of 1998 in South Africa has started a process of addressing the imbalance that existed in regard to how the national resource was being distributed. Water is now recognised as a scarce resource that belongs to all the people of the country. Consequently, it should be managed in an integrated way for social and economic development – including future growth (Fuggle & Rabie, 2005:293; Reimann, Chimboza & Fubesi, 2012:446). What is required is an attitude that incorporates a sensitivity in the careful cognisance and management of ―the aggregate of surrounding objects, conditions, and influences that impact on the life and habits of man, or any other organism or collection of organisms (South Africa, 1989). The provision of potable water by water services authorities (WSAs) is an important basic service that faces a number of challenges, such as the use of an outdated infrastructure, the lack of skilled and knowledgeable people, improper planning, and the booming population that places overt pressure on the demand for service delivery. This study was, therefore, undertaken to investigate how a municipality – which is forced to obtain its potable water supply from nearby surface and groundwater catchments, could manage this supply in a more effective, efficient, equitable, economic and sustainable manner by means of improved co-operative governance and intergovernmental relations. The key motivation was thus to develop a plan that would manage water resources more effectively on strategic, tactical and operational levels within government structures and to assist in realising integrated water resources management (IWRM). The proposed plan could be used to develop a shared vision for the Dr Kenneth Kaunda District Municipality (Dr KKDM) municipal area of responsibility; and to provide an overview of the strengths, weaknesses, opportunities and threats regarding the management of water resources. A qualitative research design was used to conduct the study, which included a literature review, semi-structured interviews, data sampling and scientific analysis of responses. Furthermore, a case-study approach was followed by the researcher, with Dr KKDM as the unit of analysis (the locus). / Thesis (Ph.D. (Public Management and Governance))--North-West University, Potchefstroom Campus, 2013.

In karst areas relationships between activities occurring on the surface and the overall health of the subsurface environment are often highly interconnected. However, the complex nature of karst flow systems can often make identification of these connections difficult. Carroll Cave, a large stream cave system located in the central Missouri Ozarks, is known for its biological and speleological significance. A dye tracing project to delineate a Carroll Cave recharge area through dye tracing has identified an area of 18.5 km2 which contributes water to the cave. The water from Thunder River within Carroll Cave was positively traced to eight springs of the thirteen springs at a distributary spring system known as Toronto Springs. Through examination of the geochemistry of the individual springs, differences in water chemistry between the various outlets has become evident. Additional work with YSI Sonde dataloggers and consideration of carbonate chemistry relationships has sought to further define the variations in hydrochemical behavior, thus aiding in the discrimination potential spring sources. Primary sources thought to contribute water to the spring system include Carroll Cave and Wet Glaize Creek, with some minor influence from other losing streams in the vicinity. Seepage runs along Wet Glaize Creek have also identified major losing reaches, in close proximity to structural features, which may contribute water to Toronto Springs. Examination of the measured parameters and derived have identified that Carroll Cave and Wet Glaize Creek are the primary end members for Ca2+, Mg2+, HCO3-, specific conductance, and temperature. Using these parameters a two end member mixing model has been developed which describes the mixing zone setting at Toronto Springs and calculates the average proportions of flow contributions by the end members. By using a multi-proxy approach of dye tracing, seepage runs, and geochemistry for the individual springs, the source waters and pathways for the springs at Toronto Springs have been identified.

Surface coal mining is a major form of land change and environmental degradation in Central Appalachia. Traditional mine reclamation iresults in unmanaged, unproductive grasslands that fail to mitigate many of the environmental costs of coal mining and are of minimal use to communities. Forestry reclamation is an alternative reclamation tactic that has the potential to address both environmental and socioeconomic concerns in Central Appalachia. A case study of Laurel Fork Mine in Eastern Kentucky is included.