249 research outputs found
Classification of Aquifers
This dissertation contains three papers describing an approach to classifying aquifers and groundwater systems. The three papers bring together the development of a basin scale groundwater classification system that integrates the literature, data gathering, and data analysis and testing. The classification system is a comprehensive method designed to improve interdisciplinary communication and standardize how groundwater systems are compared in watersheds across in the west and potentially beyond.
Aquifers and groundwater systems can be classified using a variety of independent methods to characterize geologic and hydraulic properties, the degree of connection with surface water, and geochemical conditions. In light of a growing global demand for water associated with population growth, land development, and the expected effects of climate change, a standardized approach for classifying groundwater systems at the watershed scale is needed. To this end, a comprehensive classification system is developed that combines recognized methods and new approaches into one system. The purpose of this approach is to provide groundwater professionals, policy makers, and watershed managers with a widely applicable classification system that reduces sometimes cumbersome complex groundwater databases and analyses to straightforward graphical representations. The proposed classification system uses basin geology, aquifer productivity, threats and impacts posed by humans, water quality, and the degree of groundwater/surface water exchange as classification criteria. The approach is based on literature values, reference databases, and basic hydrologic and hydrogeologic principles. The proposed classification system treats data set completeness as a variable and includes a tiered assessment protocol that depends on the quality and quantity of data. In addition, it assembles and catalogs groundwater information using a consistent set of nomenclature. It is designed to analyze and display results using Geographical Information System (GIS) mapping tools, while standardizing descriptions of groundwater conditions and to support resource managers as they make land use decisions at the watershed scale.
Together, the three papers describe a method for comparing and contrasting aquifer properties and systems needed by watershed managers. It is argued that the proposed methodology is needed to assist managers and planner in understanding the role of aquifers in watersheds as well as for the broad multi-basin comparison of aquifer data . The classification method does not replace current standard practices traditionally used to assess or characterize aquifers and groundwater systems. However, it does provide a standard methodology by which existing and new hydrogeologic data can be organized, easily communicated, and broadly compared on a watershed scale of 1:100,000 to 1:250,000. It is believed this classification system will promote an improved technical understanding between groundwater professionals and natural resource managers. Three appendices are included in this dissertation. The appendices provide supporting information for the three papers and results for four case studies
Overview of the Flathead Lake Voluntary Nutrient Reduction Strategy (VNRS)
If you ask Montanans which five Montana lakes are the most important or valuable, invariably Flathead Lake is in the top three picks. The lake\u27s size, beauty, recreation benefits, and excellent water quality increase local real estate values and make it a popular destination. However, few Montanans know that Flathead Lake currently does not meet State water quality standards (ARM 17.30.637 (1)(e)General Prohibitions), and is undergoing the eutrophication process at an accelerated rate. Excess nutrients (phosphorus and nitrogen) stimulate algal blooms and serious oxygen depletion of the deep waters. Extensive lake and stream water quality monitoring document that nonpoint source pollution is degrading water quality, interfering with beneficial uses, and causing violation of water quality standards. As a result, Flathead Lake is included on the Clean Water Actâs Section 303(d) list of water-quality-impaired waterbodies, and is a high priority for developing a water quality restoration plan (called a Total Maximum Daily Load or TMDL). Such a plan is close to completion.
Probable sources of water quality impairment include atmospheric deposition, domestic wastewater lagoons, flow regulation/modification, municipal point sources, on-site wastewater treatment systems (septic tanks), urban sprawl, overland runoff, agriculture, silvaculture, and an upstream impoundment. Only 2 percent of the nutrient load in Flathead Lake is estimated to come from point sources. The vast majority of nutrients come from natural sources or human-caused nonpoint source pollution. To address nonpoint source pollution, the Flathead Basin Commission (FBC) developed the Voluntary Nutrient Reduction Strategy (VNRS), and linked it to the TMDL process. The goal of the VNRS is to achieve the 1978 lake primary productivity level of 80 grams carbon/m2/year. This level is expected to yield water quality that meets water quality standards and supports beneficial uses (including swimming and aquatic life support). To meet the target primary productivity, the FBC determined that nitrogen (including nitrate plus nitrite) and phosphorus loading must be reduced by 15 percent basin wide. Six principal components for successful implementation of the ongoing VNRS/TMDL program include:
(1) coordination and planning, (2) grant funding & contributions (3) partnerships and public outreach, (4) participation of watershed groups, (5) identification of opportunities, and (6) monitoring. History, implementation and achievements of the Flathead Basin VNRS/TMDL are described in this paper
Global Law as Intercontextuality and as Interlegality
Since the 1990s the effects of globalization on law and legal developments has been a central topic of scholarly debate. To date, the debate is however marked by three substantial deficiencies which this chapter seeks to remedy through a reconceptualization of global law as a law of inter-contextuality expressed through inter-legality and materialized through a particular body of legal norms which can be characterized as connectivity norms.
The first deficiency is a historical and empirical one. Both critics as well as advocates of ânon-state lawâ share the assumption that âlaw beyond the stateâ and related legal norms have gained in centrality when compared with previous historical times. While global law, including both public and private global governance law as well as regional occurrences such as EU law, has undergone profound transformations since the structural transformations which followed the de-colonialization processes of the mid-twentieth century, we do not have more global law relatively to other types of law today than in previous historical times.
The second deficiency is a methodological one. The vast majority of scholarship on global law is either of an analytical nature, drawing on insights from philosophy, or empirically observing the existence of global law and the degree of compliance with global legal norms at a given moment in time. While both approaches bring something to the table they remain static approaches incapable of explaining and evaluating the transformation of global law over time.
The third deficiency is a conceptual-theoretical one. In most instances, global law is understood as a unitary law producing singular legal norms with a planetary reach, or, alternatively, a radical pluralist perspective is adopted dismissing the existence of singular global norms. Both of these approaches however misapprehend the structural characteristics, function and societal effects of global law. Instead a third positon between unitary and radical pluralist perspectives can be adopted through an understanding of global law and its related legal norms as a de-centred kind of inter-contextual law characterised by inter-legality
Medical genetics and genomic medicine in the United States of America. Part 1: history, demographics, legislation, and burden of disease.
RA-MAP, molecular immunological landscapes in early rheumatoid arthritis and healthy vaccine recipients
Rheumatoid arthritis (RA) is a chronic inflammatory disorder with poorly defined aetiology characterised by synovial inflammation with variable disease severity and drug responsiveness. To investigate the peripheral blood immune cell landscape of early, drug naive RA, we performed comprehensive clinical and molecular profiling of 267 RA patients and 52 healthy vaccine recipients for up to 18 months to establish a high quality sample biobank including plasma, serum, peripheral blood cells, urine, genomic DNA, RNA from whole blood, lymphocyte and monocyte subsets. We have performed extensive multi-omic immune phenotyping, including genomic, metabolomic, proteomic, transcriptomic and autoantibody profiling. We anticipate that these detailed clinical and molecular data will serve as a fundamental resource offering insights into immune-mediated disease pathogenesis, progression and therapeutic response, ultimately contributing to the development and application of targeted therapies for RA.</p
An ecological future for weed science to sustain crop production and the environment. A review
Sustainable strategies for managing weeds are critical to meeting agriculture's potential to feed the world's population while conserving the ecosystems and biodiversity on which we depend. The dominant paradigm of weed management in developed countries is currently founded on the two principal tools of herbicides and tillage to remove weeds. However, evidence of negative environmental impacts from both tools is growing, and herbicide resistance is increasingly prevalent. These challenges emerge from a lack of attention to how weeds interact with and are regulated by the agroecosystem as a whole. Novel technological tools proposed for weed control, such as new herbicides, gene editing, and seed destructors, do not address these systemic challenges and thus are unlikely to provide truly sustainable solutions. Combining multiple tools and techniques in an Integrated Weed Management strategy is a step forward, but many integrated strategies still remain overly reliant on too few tools. In contrast, advances in weed ecology are revealing a wealth of options to manage weedsat the agroecosystem levelthat, rather than aiming to eradicate weeds, act to regulate populations to limit their negative impacts while conserving diversity. Here, we review the current state of knowledge in weed ecology and identify how this can be translated into practical weed management. The major points are the following: (1) the diversity and type of crops, management actions and limiting resources can be manipulated to limit weed competitiveness while promoting weed diversity; (2) in contrast to technological tools, ecological approaches to weed management tend to be synergistic with other agroecosystem functions; and (3) there are many existing practices compatible with this approach that could be integrated into current systems, alongside new options to explore. Overall, this review demonstrates that integrating systems-level ecological thinking into agronomic decision-making offers the best route to achieving sustainable weed management
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