Relevant bibliographies by topics / Geology – Vermont – Lake Champlain Basin

Academic literature on the topic 'Geology – Vermont – Lake Champlain Basin'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Geology – Vermont – Lake Champlain Basin"

1

Parent, Michel, and Serge Occhietti. "Late Wisconsinan Deglaciation and Champlain Sea Invasion in the St. Lawrence Valley, Québec." Géographie physique et Quaternaire 42, no. 3 (December 18, 2007): 215–46. http://dx.doi.org/10.7202/032734ar.

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ABSTRACT Champlain Sea history is directly linked to Late Wisconsinan deglacial episodes. Champlain Sea Phase I (Charlesbourg Phase) began in the Québec area at about 12.4 ka. It represented a western extension of the Goldthwait Sea between remnant Appalachian ice masses and the Laurentide Ice Sheet. Further south, at about the same time, in the Appalachian uplands and piedmont, high-level glacial lakes were impounded by the ice-front during glacial retreat toward NNW: lakes Vermont, Memphrémagog and Mégantic. Lowlands of the Upper St. Lawrence and Lake Champlain valleys were progressively deglaciated and inundated by Lake Iroquois and Lake Vermont. At about 12.1 ka, these two lakes coalesced and formed a single water-body, here referred to as Lake Candona. After the Ulverton-Tingwick Moraine was constructed, this lake extended northeastward onto the Appalachian piedmont where varved sediments containing Candona subtriangulata underlie marine clays. Current data and interpretations bring into question the former concept of the Highland Front Moraine System. The invasion of the main basin, or Champlain Sea Phase II, began around 12 ka. Replacement of Lake Candona by the sea resulted in a fall of about 60 m in water levels. Champlain Sea Phase III began at the end of the Saint-Narcisse episode, at about 10.8 ka. At this time marine waters were able to enter valleys of the Laurentian Highlands where brackish or fresh paramarine basins developed.
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Meals, D. W. "Water quality response to riparian restoration in an agricultural watershed in Vermont, USA." Water Science and Technology 43, no. 5 (March 1, 2001): 175–82. http://dx.doi.org/10.2166/wst.2001.0280.

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Achievement of management goals for Lake Champlain (Vermont/New York, USA and Quebec, Canada) will require reduction of agricultural phosphorus loads, the dominant nonpoint source in the Basin. Cost-effective phosphorus reduction strategies need reliable treatment techniques beyond basic cropland and waste management practices. The Lake Champlain Basin Agricultural Watersheds National Monitoring Program (NMP) Project evaluates the effectiveness of livestock exclusion, streambank protection, and riparian restoration practices in reducing concentrations and loads of nutrients, sediment, and bacteria in surface waters. Treatment and control watersheds in northwestern Vermont have been monitored since 1994 according to a paired-watershed design. Monitoring consists of continuous stream discharge recording, flow-proportional sampling for total P, total Kjeldahl N, and total suspended solids, grab sampling for indicator bacterial, and land use/agricultural monitoring. Strong statistical calibration between the control and treatment watersheds has been achieved. Installation of riparian fencing, protected stream crossings, and streambank bioengineering was completed in 1997. Early post-treatment data suggest significant reduction in P concentrations and loads and in bacteria counts in the treated watershed. Monitoring is scheduled to continue through 2000.
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L. T. Ghebremichael, T. L. Veith, and M. C. Watzin. "Determination of Critical Source Areas for Phosphorus Loss: Lake Champlain Basin, Vermont." Transactions of the ASABE 53, no. 5 (2010): 1595–604. http://dx.doi.org/10.13031/2013.34898.

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Guilbert, Justin, Brian Beckage, Jonathan M. Winter, Radley M. Horton, Timothy Perkins, and Arne Bomblies. "Impacts of Projected Climate Change over the Lake Champlain Basin in Vermont." Journal of Applied Meteorology and Climatology 53, no. 8 (August 2014): 1861–75. http://dx.doi.org/10.1175/jamc-d-13-0338.1.

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AbstractThe Lake Champlain basin is a critical ecological and socioeconomic resource of the northeastern United States and southern Quebec, Canada. While general circulation models (GCMs) provide an overview of climate change in the region, they lack the spatial and temporal resolution necessary to fully anticipate the effects of rising global temperatures associated with increasing greenhouse gas concentrations. Observed trends in precipitation and temperature were assessed across the Lake Champlain basin to bridge the gap between global climate change and local impacts. Future shifts in precipitation and temperature were evaluated as well as derived indices, including maple syrup production, days above 32.2°C (90°F), and snowfall, relevant to managing the natural and human environments in the region. Four statistically downscaled, bias-corrected GCM simulations were evaluated from the Coupled Model Intercomparison Project phase 5 (CMIP5) forced by two representative concentration pathways (RCPs) to sample the uncertainty in future climate simulations. Precipitation is projected to increase by between 9.1 and 12.8 mm yr−1 decade−1 during the twenty-first century while daily temperatures are projected to increase between 0.43° and 0.49°C decade−1. Annual snowfall at six major ski resorts in the region is projected to decrease between 46.9% and 52.4% by the late twenty-first century. In the month of July, the number of days above 32.2°C in Burlington, Vermont, is projected to increase by over 10 days during the twenty-first century.
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Meals, D. W., and R. B. Hopkins. "Phosphorus reductions following riparian restoration in two agricultural watersheds in Vermont, USA." Water Science and Technology 45, no. 9 (May 1, 2002): 51–60. http://dx.doi.org/10.2166/wst.2002.0203.

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Achievement of management goals for Lake Champlain (Vermont/New York, USA and Quebec, Canada) will require significant reductions of phosphorus (P) loads from agriculture, the dominant diffuse source in the basin. Cost-effective P reduction strategies must be based on reliable treatment techniques beyond basic erosion control and animal waste storage practices. The Lake Champlain Basin Agricultural Watersheds National Monitoring Program (NMP) Project evaluates the effectiveness of low-cost livestock exclusion, streambank protection, and riparian restoration practices in reducing concentrations and loads of diffuse-source pollutants from grazing land at the watershed level. Treatment and control watersheds in northwestern Vermont have been monitored since 1994 according to a paired-watershed design. Monitoring includes continuous stream discharge recording, flow-proportional sampling for total P and other pollutants, and documentation of land use and agricultural management activities. Strong statistical calibration between the control and treatment watersheds has been achieved. Landowner participation in the land treatment program was entirely voluntary and all treatments were 100% cost-shared by the project and cooperators. Installation of riparian fencing, alternative water supplies, protected stream crossings, and streambank bioengineering was completed in 1997 at a cost of less than US$40,000. The paired-watershed design was effective in controlling for the influence of extreme variations in precipitation and streamflow over six years of monitoring. Two years of post-treatment data have documented significant reductions in P concentrations and loads from both treated watersheds. Reductions of ∼20% in mean total P concentration and ∼20–50% in mean total P load have been observed, with greater reductions occurring in the watershed receiving more extensive treatment. The effectiveness of riparian zone restoration in P reduction tended to be lower during periods of very high runoff, especially outside the growing season.
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Spett, Emma J. "Building Resilience in Trans-boundary Social-Ecological Systems: Adaptive Governance in the Lake Champlain Richelieu River Basin." Complexity, Governance & Networks 5, no. 1 (October 24, 2019): 65. http://dx.doi.org/10.20377/cgn-81.

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Addressing the management of water bodies that cross political, cultural, and ecological boundaries entails working with a level of complexity that requires creative, adaptive management strategies that build resilience throughout the system and allow for increased capacity in the face of disturbance. To characterize the extent to which such complexity can be managed, this paper explores the application of the social-ecological systems framework, proposed by Brian Walker and David Salt, for assessing and managing resilience. Elements of this framework will be utilized with respect to the Lake Champlain Richelieu River Basin, which is a freshwater basin that exists between the United States and Canada, in Vermont, New York, and Quebec. The paper will end with considerations regarding how adaptive management and adaptive governance can be employed as tools to build resilience in this region.
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Bitterman, Patrick, and Christopher J. Koliba. "Modeling Alternative Collaborative Governance Network Designs: An Agent-Based Model of Water Governance in the Lake Champlain Basin, Vermont." Journal of Public Administration Research and Theory 30, no. 4 (April 15, 2020): 636–55. http://dx.doi.org/10.1093/jopart/muaa013.

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Abstract With the widespread use of collaborative governance mechanisms for mitigating water pollution, an opportunity exists to test alternative institutional designs based on collaborative governance theory using computer simulation models, particularly when there is a clear relationship between governance networks, observable resource allocation decisions, and measurable outcomes. This is especially the case for wicked problems like nonpoint source water pollution where there are compelling questions regarding how best to design policies, allocate funds, and build administrative capacity to meet water quality standards. We present an agent-based model (ABM) of water governance for the Lake Champlain Basin to simulate the impacts of alternative collaborative governance arrangements on the development of suites of water quality projects. The ABM is connected or coupled with land use and phosphorus load accumulation models that are informed by existing hydrologic models, project datasets, and state-set load reduction targets. We find that regionally arranged collaborative governance in water quality project planning and implementation can lead to better water quality outcomes, thereby affirming one of the central premises of collaborative governance regime theory. We also find that externally mandated collaboration, as opposed to voluntary, self-initiated collaboration, can lead to better water quality outcomes, adding to our understanding of which type of collaborative governance arrangement is best suited to the specific contexts of this case. Further, without adequate administrative capacity in the form of human resources located in central network actors to manage project funds, “administrative bottlenecks” may form and money can go unspent. This research demonstrates the efficacy of using simulations of alternative institutional design for theory testing and tuning, and policy prototyping.
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Naldrett, Dana L. "The Late Glacial-Early Glaciomarine Transition in the Ottawa Valley: Evidence for a Glacial Lake?" Géographie physique et Quaternaire 42, no. 2 (December 18, 2007): 171–79. http://dx.doi.org/10.7202/032723ar.

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ABSTRACT Rhythmites overlying either cross-bedded sand or diamicton are found throughout the Ottawa Valley. Previously thought to be restricted glacial lake sediments, they are now known to be widespread, and represent a large proglacial lake which preceded the Champlain Sea. The rhythmites consist of thin silt and clay laminae which fine upwards and contain slump, flame, shear (ice-contact?) and fluid escape structures. Ice-rafted material is common. The ostracode Candona cf. C. subtriangulata occurs in low numbers and indicates a freshwater body with depth of approximately 200 m. The alternation of silt and clay rhythmite laminae is characteristic of deposition by underflow and overflow currents, respectively. To produce underflows with typical glacial outwash concentrations may require discharge into fresh rather than marine water. This evidence and the widespread occurrence of rhythmites throughout the Ottawa Valley and the Rideau Lakes area suggests a large proglacial lake as the sedimentary basin. The lake is tentatively correlated with the Belleville Phase of Glacial Lake Iroquois and the Ft. Ann Phase of Glacial Lake Vermont. These phases occurred at depths consistent with the requirements for Candona survival. The water body which existed in the Ottawa area is here called Lake Rideau after the type locality where rhythmites were first observed. Generation of such a lake favours the more conventional "window blind" model for déglaciation rather than the calving bay concept.
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Cianfrani, Christina M., S. Mažeika P. Sullivan, W. Cully Hession, and Mary C. Watzin. "A MULTITAXONOMIC APPROACH TO UNDERSTANDING LOCAL- VERSUS WATERSHED-SCALE INFLUENCES ON STREAM BIOTA IN THE LAKE CHAMPLAIN BASIN, VERMONT, USA." River Research and Applications 28, no. 7 (December 2, 2010): 973–88. http://dx.doi.org/10.1002/rra.1470.

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10

Parent, Michel, and Serge Occhietti. "Late Wisconsinan deglaciation and glacial lake development in the Appalachians of southeastern Québec." Géographie physique et Quaternaire 53, no. 1 (October 2, 2002): 117–35. http://dx.doi.org/10.7202/004859ar.

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Abstract Late Wisconsinan deglaciation in southeastern Québec was preceded by a northward ice-flow reversal that was recorded in the northeastern part of the region. The reversal event was generated by flow convergence toward the St. Lawrence Ice Stream, a northeastward-flowing ice stream which formed in the St. Lawrence estuary prior to 13 000 years BP and lasted until at least 12 400 years BP. In the Bois-Francs uplands, the flow reversal event led to the formation of a semi-detached ice mass that underwent widespread stagnation and downwasting. In the southwestern region, northward retreat of the margin of the Laurentide Ice Sheet was marked by the formation of a series of discontinuous recessional moraines and by the development of ice-dammed lakes in the main valleys. The level of these lakes fell as progressively lower outlets became ice-free. The main episodes are (1) the Sherbrooke Phase of Glacial Lake Memphremagog, (2) an unnamed transitional lake and (3) Glacial Lake Candona, a large lake which had expanded northeastward from the deglaciated regions of the Upper St. Lawrence (Lake Iroquois) and Ottawa valleys to the Lake Champlain (Glacial Lake Vermont) basin. As recorded by the Danville Varves, Lake Candona lasted about 100 years following deposition of the Ulverton-Tingwick Moraine. Subsequent ice retreat along the Appalachian piedmont led to final drainage of Lake Candona and allowed Champlain Sea waters to invade much of these glaciolacustrine terrains about 12 000 years BP. On the basis of the Danville Varves record, a regional rate of ice retreat of about 200 m·a -1 is inferred. The age of the earliest moraine, the Frontier Moraine, is thus about 12 550 years BP, while the ages of the subsequent Dixville, Cherry River-East-Angus, Mont Ham and Ulverton-Tingwick moraines are estimated at 12 500, 12 325, 12 200 et 12 100 years BP, respectively.
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Books on the topic "Geology – Vermont – Lake Champlain Basin"

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Medalie, Laura. Concentrations and loads of nutrients and suspended sediments in Englesby Brook and Little Otter Creek, Lake Champlain Basin, Vermont, 2000-2005. Reston, Va: U.S. Geological Survey, 2007.

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Book chapters on the topic "Geology – Vermont – Lake Champlain Basin"

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Wang, Deane, Lisa J. Windhausen, and David C. Braun. "A Landscape Scale Evaluation of Phosphorus Retention in Wetlands of the Laplatte River Basin, Vermont, USA." In Lake Champlain: Partnerships and Research in the New Millennium, 221–39. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4757-4080-6_12.

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