Results of a monitoring program of continuous water levels, specific conductance, and water temperature at the OK Tool Facility of the Savage Municipal Well Superfund Site, Milford, New Hampshire

The aim of this paper is to study diurnal fluctuations of the water level in streams draining headwaters and to identify the controlling factors. The fieldwork was carried out in the Gryżynka River catchment, western Poland. The water levels of three streams draining into the headwaters via a group of springs were monitored in the years 2011–2014. Changes in the water pressure and water temperature were recorded by automatic sensors – Schlumberger MiniDiver type. Simultaneously, Barodiver type sensors were used to record air temperature and atmospheric pressure, as it was necessary to adjust the data collected by the MiniDivers calculate the water level. The results showed that diurnal fluctuations in water level of the streams ranged from 2 to 4 cm (approximately 10% of total water depth) and were well correlated with the changes in evapotranspiration as well as air temperature. The observed water level fluctuations likely have resulted from processes occurring in the headwaters. Good correlation with atmospheric conditions indicates control by daily variations of the local climate. However, the relationship with water temperature suggests that fluctuations are also caused by changes in the temperature-dependent water viscosity and, consequently, by diurnal changes in the hydraulic conductivity of the hyporheic zone.

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A multi-model approach toward understanding iron fouling at rock-fill drainage sites along roadways in New Hampshire, USA

SN Applied Sciences ◽

10.1007/s42452-020-2849-2 ◽

2020 ◽

Vol 2 (6) ◽

Author(s):

Melissa A. Lombard ◽

Pamela J. Lombard ◽

Craig J. Brown ◽

James R. Degnan

Keyword(s):

New Hampshire ◽

Salt Content ◽

Specific Conductance ◽

Boosted Regression Trees ◽

Factors Affecting ◽

Rock Fill ◽

Deicing Salts ◽

Geochemical Models ◽

Roadway Construction ◽

Physicochemical Data

AbstractFactors affecting iron fouling in wet areas adjacent to roadways were investigated by collecting field rock cut and aqueous physicochemical data; developing exploratory predictive models; and developing geochemical models. Basic data included the identification of iron fouling from aerial imagery and field visits at 374 New Hampshire rock cut locations, and their associated rock-fill sites. Based on field water quality measurements from wet areas at 36 of the rock-fill sites, the occurrence of iron fouling was associated with higher values of specific conductance, lower concentrations of dissolved oxygen and lower pH compared to areas without iron fouling. A statistical model, using boosted regression trees, was developed to predict the occurrence of iron fouling in wet areas adjacent to roadways where rock-fill from nearby rock cuts was used in roadway construction. The model was used to develop a continuous iron fouling probability map for the state of New Hampshire that can be used to better understand the occurrence of iron fouling. Geochemical models illustrate how iron fouling of waters increases along roadways built with fill from sulfidic rock cuts as a result of acid generation from pyrite dissolution and ferrous iron (Fe2+) oxidation and increases in areas with greater specific conductance from deicing runoff caused by cation exchange. More iron is precipitated as goethite in simulations that include pyrite, and in simulations with deicing salts added, indicating that rock-fill sites with rocks that contain pyrite and water with greater salt content could have enhanced iron fouling.

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Isotopic evidence of increasing water abundance and lake hydrological change in Old Crow Flats, Yukon, Canada

Environmental Research Letters ◽

10.1088/1748-9326/ac3533 ◽

2021 ◽

Vol 16 (12) ◽

pp. 124024

Author(s):

Lauren A MacDonald ◽

Kevin W Turner ◽

Ian McDonald ◽

Mitchell L Kay ◽

Roland I Hall ◽

...

Keyword(s):

Isotope Composition ◽

Monitoring Program ◽

Additive Models ◽

Water Levels ◽

Wildlife Habitat ◽

Ecosystem Monitoring ◽

International Polar Year ◽

Monitoring Programs ◽

Old Crow Flats

Abstract Lake-rich northern permafrost landscapes are sensitive to changing climate conditions, but ability to track real-time and potentially multiple hydrological responses (e.g. lake expansion, drawdown, drainage) is challenging due to absence of long-term, sustainable monitoring programs in these remote locations. Old Crow Flats (OCF), Yukon, is a Ramsar Wetland of International Importance where concerns about low water levels and their consequences for wildlife habitat and traditional ways of life prompted multidisciplinary studies during the International Polar Year (2007–2008) and led to the establishment of an aquatic ecosystem monitoring program. Here, we report water isotope data from 14 representative thermokarst lakes in OCF, the foundation of the monitoring program, and time-series of derived metrics including the isotope composition of input waters and evaporation-to-inflow ratios for a 13 year period (2007–2019). Although the lakes spanned multiple hydrological categories (i.e. rainfall-, snowmelt- and evaporation-dominated) based on initial surveys, well-defined trends from application of generalized additive models and meteorological records reveal that lakes have become increasingly influenced by rainfall, and potentially waters from thawing permafrost. These sources of input have led to more positive lake water balances. Given the documented role of rainfall in causing thermokarst lake drainage events in OCF and elsewhere, we anticipate increased vulnerability of lateral water export from OCF. This study demonstrates the value of long-term isotope-based monitoring programs for identifying hydrological consequences of climate change in lake-rich permafrost landscapes.

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Erosion and Accretion Trends of New Hampshire Beaches from December 2016 to March 2020: Results of the Volunteer Beach Profile Monitoring Program

10.34051/p/2021.34 ◽

2021 ◽

Author(s):

Larry Ward ◽

Rachel Morrison ◽

Alyson Eberhardt ◽

Wellsley Costello ◽

Zachary McAvoy ◽

...

Keyword(s):

New Hampshire ◽

Monitoring Program ◽

Beach Profile ◽

Profile Monitoring ◽

Erosion And Accretion

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Physico-chemical conditions at Watlab ghat in Wular lake, Kashmir

Environment Conservation Journal ◽

10.36953/ecj.2013.14301 ◽

2013 ◽

Vol 14 (3) ◽

pp. 1-7

Author(s):

Saltanat Parveen ◽

Altaf H. Ganai

Keyword(s):

Water Temperature ◽

Negative Correlation ◽

Lake Water ◽

Abiotic Factors ◽

Significant Negative Correlation ◽

Specific Conductance ◽

Water Type ◽

Physico Chemical ◽

Wular Lake ◽

Chemical Conditions

The present limnological investigations include analysis of various physico- chemical parameters at the selected site in Wular lake, Kashmir (a Ramsar site) from March, 2007 to February, 2008. The aim of current study was to evaluate the status of the Wular lake water on the basis of different physico-chemical conditions. The water depth ranged from 1.35 (m) to 2.60 (m). The pH of the water was on alkaline side throughout the study period. The lake depicted the usual cation progression: Ca > Mg. The lake can be categorized as calcium rich after Ohle (1934). Specific conductance was found low in spring and summer. High values of transparency were recorded in winter. The lake water is typical hard water type. The alkalinity was due to bicarbonates only. High values of both NO3–N (338 ?g/L) and PO4–P (203 ?g/L) were recorded during summer. Statistical analysis was also carried out to find out the degree of relationship between various abiotic factors. Dissolved oxygen showed significant negative correlation with water temperature (r = –0.839), whereas significant positive correlation with pH (r = 0.854) at the selected site. pH showed significant negative correlation with water temperature (r = –0.777) and CO2 (r = –0.854) respectively, at the selected site.

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