Phosphorus reductions following riparian restoration in two agricultural watersheds in Vermont, USA

2002 ◽  
Vol 45 (9) ◽  
pp. 51-60 ◽  
Author(s):  
D.W. Meals ◽  
R.B. Hopkins

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.

2001 ◽  
Vol 43 (5) ◽  
pp. 175-182 ◽  
Author(s):  
D. W. Meals

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.


2017 ◽  
Vol 54 (4) ◽  
pp. 379-392
Author(s):  
David G. Bailey ◽  
Marian Lupulescu ◽  
Jeffrey Chiarenzelli ◽  
Jonathan P. Traylor

Two syenite sills intrude the local Paleozoic strata of eastern New York State and are exposed along the western shore of Lake Champlain. The sills are fine-grained, alkali feldspar syenites and quartz syenites, with phenocrysts of sanidine and albite. The two sills are compositionally distinct, with crossing rare earth element profiles and different incompatible element ratios, which eliminates the possibility of a simple petrogenetic relationship. Zircon extracted from the upper sill yields a U–Pb age of 131.1 ± 1.7 Ma, making the sills the youngest known igneous rocks in New York State. This age is similar to that of the earliest intrusions in the Monteregian Hills of Quebec, >100 km to the north. Sr and Nd radiogenic isotope ratios are also similar to those observed in some of the syenitic rocks of the eastern Monteregian Hills. The Cannon Point syenites have compositions typical of A-type, within-plate granitoids. They exhibit unusually high Ta and Nb concentrations, resulting in distinct trace element signatures that are similar to those of the silicic rocks of the Valles Caldera, a large, rift-related magmatic system. We suggest that the Cannon Point syenites were melts derived primarily by anatexis of old, primitive, lower crustal material in response to Mesozoic rifting and to the intrusion of mantle-derived magmas. The sills indicate that the effects of continental rifting were spatially and temporally extensive, resulting in the reactivation of basement faults in the Lake Champlain Valley hundreds of kilometers west of the active rift boundary, and crustal melting >50 Ma after the initiation of rifting.


Hypertension ◽  
2020 ◽  
Vol 76 (Suppl_1) ◽  
Author(s):  
Nirav H Shah

Introduction: We assessed the efficacy of mobile healthhypertension monitoring for patients enrolled inMedicare’s Remote Physiologic Monitoring (RPM)program. Hypothesis: Uncontrolled hypertension is an increasingepidemic associated with cardiovascular disease.Despite many available treatments, the averagetime to blood pressure control is slow. Lack ofaccess to patient information including bloodpressure data outside of the clinic setting meansthat clinicians cannot easily titrate medications. Wehypothesized that mobile health monitoring andcommunication with clinicians in a Medicare cohortwould decrease the hypertension burden andmitigate crisis blood pressure in patients. Methods: 1,544 patients who had contributed ≥ 20 bloodpressure readings in a remote monitoring programwere included in the study population, spanningclinics in Florida, Tennessee, Arizona, Ohio, Texas,New York, and California. Eligible patients carried adiagnosis of hypertension and had been seen bytheir doctor within the year they were referred. Themobile health platform was utilized to aggregateblood pressure data, which was analyzed by aremote care team and provided to clinicians on amonthly basis. Patients’ doctors and their teamsreviewed and managed the patients based on thedata provided by the mobile-cloud platform. Theremote monitoring program provided alerts to clinicstaff for patients who had blood pressures greaterthan 180mm Hg systolic (crisis hypertension) forexpedited decision making. Results: 1,544 patients who provided >20 BP readingsfrom January 2018 to January 2020 wereincluded in the study. A total of 297,731 bloodpressure readings were included in thisanalysis. Patient readings were stratified byepoch chronologically. The first epoch (E1),represented the first 25% of readings in theremote monitoring system, and the fourth epoch(E4) represented the final 25% of readings.From E1 to E4, patients saw an averagedecrease of 3.8 mmHg in systolic bloodpressure (132.9 vs. 129.1; p<0.001). Theproportion of readings in crisis hypertensionrange decreased from 2.3% to 1.1%; p=0.03). Conclusions: RPM offers a scalable solution to resistant hypertension.


Author(s):  
David R. Starbuck

Numerous British fortifications were constructed in the 1750s along Lake Champlain, Lake George, and the Hudson River, all on the eastern edge of the colony of New York. Many of these positions were reoccupied twenty years later during the American Revolution. The author has conducted excavations for nearly thirty years at several of these forts and encampments, seeking to understand the strategies, provisioning, foodways, and building techniques employed by British Regulars and Provincial soldiers as they fought on the American landscape. These sites include Fort William Henry, Fort Edward, Rogers Island, and Fort George, each of which helped to open up the interior of the colony of New York to further settlement.


Stirrings ◽  
2019 ◽  
pp. 1-25
Author(s):  
Lana Dee Povitz

Using the conceptual lens of terroir, this chapter provides an overview of hunger and poverty in the United States, starting with the urban liberalism of the 1960s and tracing the onset of austerity politics from mid-1970s through the early 2000s. It shows how New York City food activism was connected to an array of apparently unrelated social movements, including American Communism, community control, the countercultural New Left, feminism, Black Power, and AIDS activism. As governments reduced spending on social programs, leaders from these movements formed nonprofit organizations geared toward providing services, such as emergency meals and low-cost groceries. This chapter offers an overview of why and how service provision came to absorb the attention of late-twentieth century activists and shows how nonprofit kitchens and offices became sites of mentorship. As charismatic, overwhelmingly female leaders passed on values and strategies forged in earlier eras, they enacted activist genealogies that helped sustain political involvement over decades. Powerful interpersonal bonds and people’s own sense of being transformed by their activism illuminate the underappreciated role of emotion in the history of left-progressive movements.


2021 ◽  
pp. 25-50
Author(s):  
Kevin J. Weddle

This chapter describes the first British invasion of New York via the historic Lake Champlain, Lake George, and Hudson River route in the autumn of 1776. It starts with General Sir Guy Carleton’s successful defense of Canada and repulse of the American attempt to seize Quebec. The increasingly fraught relationship between Carleton and Lord George Germain is also addressed as is the naval arms race between the Americans and the British. This race delayed Carleton’s offensive south on Lake Champlain more than the celebrated Battle of Valcour Island, and he was forced to abandon the offensive after he reached Crown Point, much to the dismay of his second-in-command, Lieutenant General John Burgoyne. This failed first invasion planted the seeds for a new plan created in part by Burgoyne.


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