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openCC (other)May 2019View details →

Groundwater level data from 2013 to 2015 in Central Sands area, Wisconsin

38 groundwater wells' water level data in Central Sands area, Wisconsin. The Central Sands is an area of the state with a high density of high-capacity wells for irrigation. The Wisconsin Department of Natural Resources (WDNR), UW Extension, and the counties began monitoring shallow groundwater wells near lakes in 2013. The five counties include: Portage, Waupaca, Adams, Waushara, and Marquette. Volunteers were enlisted to monitor lake levels on 38 lakes in the region. Instead of using staff gauges, the team opted to install shallow groundwater wells near the lake shore. This eliminated the need to reinstall and survey staff gauges each season. It was assumed that shallow groundwater wells would be a good approximation of lake levels because the soils are made up of porous, sand material. On a subset of lakes, WDNR collected water level data from the shallow groundwater wells and from staff gauges at the same time. One season of monitoring showed that changes in water levels over time are similar, but the actual elevation of water in the well might be different than the surface of the lake. This data set can be downloaded from WDNR's SWIMS database: https://dnr.wi.gov/topic/surfacewater/swims/

openCC (other)Feb 2021View details →

Marcell Experimental Forest monthly aquifer groundwater chemistry at the S2 catchment, 2007 - ongoing

This data set reports groundwater chemistry for an aquifer well in the uplands of the S2 catchment at the Marcell Experimental Forest (MEF) in Itasca County, Minnesota. Aquifer groundwater has been collected monthly. Samples are measured for pH, specific conductivity, anions (chloride, sulfate), cations (calcium, magnesium, potassium, sodium, aluminum, manganese, strontium), silicon, nutrients (ammonium, nitrate, soluble reactive phosphorus, total nitrogen, total phosphorus), and total organic carbon. Occasionally, stable water isotopes have been measured. The MEF is operated and maintained by the USDA Forest Service, Northern Research Station.

openCC (other)May 2021View details →

Groundwater dependence of riparian woodlands and the disrupting effect of anthropogenically altered streamflow

This dataset includes data inputs from public sources, scripts and outputs to evaluate riparian vegetation reliance on groundwater across California from 2015 to 2020. This dataset accompanies the Rohde et al. paper titled, Groundwater dependence of riparian woodlands and the disrupting effect of anthropogenically altered streamflow. The provided scripts process groundwater, vegetation, climate, and streamflow input data from various sources. Further, all output data and statistical analyses are included.

Groundwater well chemistry from 7 Hillslope Project sites in Macon County, North Carolina, within the Upper Little Tennessee River Basin

Shallow groundwater wells were installed at 7 sites throughout Macon County, NC beginning in 2011. Sites represent a gradient of land use, including relatively undisturbed forests, valley bottomlands in agriculture, and mountain developments. Nine groundwater wells were placed along 3 "ridge-to-riparian" transects at each site. Collections were made every other week.

Hourly soil moisture, soil temperature, groundwater temperature, and groundwater stage height measurements from 9 Hillslope Study sites located in Macon County, North Carolina, within the Upper Little Tennessee River Basin

The Hillslope Study was established to directly link land use impacts to streamwater quality in the southern Appalachian Mountains. Nine sites were selected in the Little Tennessee River watershed in Macon County, NC, representing four land use types: forest, mountain development, traditional valley, and large river valley. At each of these sites, three subsurface flowpaths were identified, and four plots were established along the flowpath following the elevation gradient. At seven of the nine sites, the three lower elevation plots at one of the subsurface flowpaths had ground water wells installed in order to measure groundwater stage and temperature along an elevational gradient. Additional sensors were installed adjacent to the groundwater wells to measure soil moisture at 0-30 cm and 30-60 cm below the ground surface uphill and downhill of the well, and soil temperature at 5 cm below the ground surface. Measurements were taken every 60 seconds and output as hourly averages. Data were used as part of the Regional HydroEcological Simulation System (RHESSys) ecohydrologic model. Please see the accompanying well construction data for additional groundwater well information.

Groundwater stage height measurements of ten minute intervals from 9 sites located in Macon County, North Carolina, within the Upper Little Tennessee River Basin

The hillslope study was established to directly link land use impacts to streamwater quality in the southern Appalachian Mountains. Nine sites were selected in the Little Tennessee River watershed in Macon County, NC, representing four land use types: forest, mountain development, traditional valley, and large river valley. At each of these sites, three subsurface flowpaths were identified, and four plots were established along the flowpath following the elevation gradient. At seven of the nine sites, the three lower elevation plots at one of the subsurface flowpaths had ground water wells installed in order to measure groundwater stage along an elevational gradient. Measurements were taken every 60 seconds and output as ten minute averages. Data were used as part of the Regional HydroEcological Simulation System (RHESSys) ecohydrologic model. Please see the accompanying well construction data for additional groundwater well information.

Groundwater well specifications from 9 Hillslope Project sites in Macon County, North Carolina, within the Upper Little Tennessee River Basin

The hillslope study was established to directly link land use impacts to streamwater quality in the southern Appalachian Mountains. Nine sites were selected in the Little Tennessee River watershed in Macon County, NC, representing four land use types: forest, mountain development, traditional valley, and large river valley. At each of these sites, three subsurface flowpaths were identified, and four plots were established along the flowpath following the elevation gradient. At seven of the nine sites, the three lower elevation plots at one of the subsurface flowpaths had ground water wells installed in order to measure groundwater stage along an elevational gradient. A total of 61 groundwater wells were installed and their depths recorded.

openCustomJun 2006View details →

Groundwater and surface water phosphorus concentrations, Everglades National Park (FCE), South Florida for June, July, August and November 2003

Seawater intrusion into a coastal aquifer mixes with the discharging fresh water to form a zone of mixed composition. This mixing zone is considered to be geochemical important in a carbonate aquifer as an area of enhanced carbonate mineral dissolution and,or precipitation. Ion exchange reactions are also common within the mixing zone as the dominant cation in seawater, sodium, replaces other ions adsorbed to the aquifer matrix. Phosphorus has a strong affinity for adsorption to calcium carbonate minerals. Both the dissolution of calcium carbonate minerals as well as ion exchange reactions have the potential to release phosphorus from the aquifer matrix to the groundwater. Discharge of this phosphorus-laden groundwater, as induced by the fresh/saline water interface, may then be an additional source of phosphorus to the overlying coastal environments. Both surface water and groundwater were collected across the seawater intrusion zone of the coastal Everglades in south Florida during the summer of 2003. Hydrogen sulfide was released from the groundwater wells during sampling, indicating the groundwater was most likely anoxic. In order to reduce the potential exposure of the groundwater to oxygen during sampling, groundwater samples were collected in the following manner. Groundwater wells were first purged of at least three well volumes prior to sampling. Water samples were then collected using a submersible pump with a 16-gauge needle fitted at the end of the discharge hose. The needle was pushed through a rubber stopper covering an acid-washed vacutainer that was first flushed with nitrogen gas to remove and oxygen, then evacuated with a vacuum pump to establish a negative pressure within the vacutainer. Water samples were stored on ice and transported to the laboratory. Samples were processed for total phosphorus using colorimetery following dry-oxidation/acid hydroloysis methods within 1 to 5 days following sample collection. Salinity of the groundwater and surf

openCC0Oct 2024View details →

WSI01 Long-term water (stream, groundwater, precipitation) stable isotope records at Konza Prairie

Long-term oxygen and hydrogen stable isotope (δ18O and δ2H) records for precipitation, stream water, and groundwater at Konza Prairie Biological Station.

openCC (other)Feb 2019View details →

Groundwater well chemistry data for Niwot Saddle, C1 and Martinelli, 2005 - ongoing.

This is a summary of major ion concentrations and chemistry data for groundwater samples collected at groundwater wells on the Niwot saddle, C1 site and Martinelli site.

openCC0Jul 2020View details →

Middle Rio Grande riparian plant cover sensitivity to variability in groundwater depth collected by the Bosque Ecosystem Monitoring Program

Determining the ecological consequences of interactions between slow changes in long-term climate means and amplified variability in climate is an important research frontier in plant ecology. We combined the recent approach of climate sensitivity functions with a revised hydrological ‘bucket model’ to improve predictions on how plant species will respond to future changes in both the mean and variance of groundwater resources. We leveraged spatiotemporal variation in a long-term dataset of riparian vegetation cover to build the first groundwater sensitivity functions (GSFs) for common plant species of dryland riparian corridors. Our results demonstrate the value of this approach to identifying which plant species will thrive (or fail) in an increasingly variable climate layered on top of declining groundwater stores. Riparian plant species differed in sensitivity to both the mean and variance in groundwater levels. Rio Grande cottonwood (Populus deltoides ssp. wislizenii) cover was predicted to decline with greater interannual groundwater variance, while coyote willow (Salix exigua) and other native wetland species were predicted to benefit from greater year-to-year variance. No non-native species were sensitive to groundwater variance, but patterns for Russian olive (Elaeagnus angustifolia) predict declines under deeper mean groundwater tables. Warm air temperatures modulated groundwater sensitivity for cottonwood, which was more sensitive to variability in groundwater in years/sites with warmer maximum temperatures than in cool sites/periods. Cottonwood cover declined most with greater intra-annual coefficients of variation (CV) in groundwater, but was not significantly correlated with inter-annual CV, perhaps due to the relatively short time series (16 y) relative to cottonwood lifespan. In contrast, non-native tamarisk (Tamarix chinensis) cover increased with both intra- and inter-annual CV in groundwater. Altogether, our results predict that changes in groundw

openCC (other)Mar 2024View details →

Riparian depth to groundwater from monthly well data in the shallow aquifer of the Rio Grande flood plain (Bosque) in New Mexico, USA: 1997-2023

Bosque Ecosystem Monitoring Program(BEMP). BEMP is a partnership between Bosque School, Sevilleta Long Term Ecological Research Station, and the University of New Mexico. Five wells at each BEMP site (33 in total) are used to measure depth to groundwater, which plays a critical role in cottonwood and other vegetation health and are also important to understanding water cycle and evapotranspiration dynamics.

openCustomMay 2020View details →

Groundwater Levels at Phillips Creek Marsh, VA 2012-2020

This dataset contains information on water level and temperature in a series of groundwater wells in Phillips Creek Marsh, near Nassawadox, VA on the Eastern Shore of Virginia. Data on temperature and water pressure are collected every 12 minutes using automated "Ceradiver" data loggers and transformed following atmospheric adjustment into water levels. This dataset extends previous measurements using different technologies for three of the wells included in dataset: "Ground Water Level at Brownsville and Hog Island, VA 1997-2009" (knb-lter-vcr.142). The Creekbank (CB), High Marsh (BH) and Tracy2 sites are the CB1, JUNCUS2 and BW3 sites in this dataset, respectively.

openCustomOct 2020View details →

Groundwater well data on Hog Island, Virginia Coastal Barrier Islands, 1990-2007

Groundwater well data on Hog Island, 1990-2007. For updated wirelessly-networked well data after July 2007 (the same wells and locations, but different technology and sampling interval), please see follow-up dataset VCR09169. DEPTH variables are the depth of the water below the ground surface. They are negative when water levels are below the surface and positive when the surface is flooded.� ELEV variables are the elevation of the water surface above mean sea level.

Fig. 5 in A new species of freshwater flatworm (Platyhelminthes, Tricladida, Dendrocoelidae) inhabiting a chemoautotrophic groundwater ecosystem in Romania

Fig. 5. Dendrocoelum obstinatum Stocchino & Sluys, sp. nov. A. Holotype (ZMA V.Pl. 7264.1), microphotograph of gregarine protozoans in a gut diverticulum. B. Specimen from the Movile Cave, microphotograph of a nematode infecting the bulb of the adenodactyl (ZMA V.Pl. 7265.2). C. Holotype, microphotograph of the mass of sperm inside the copulatory bursa with the rod-like structures. D. Specimen from the Limanu well, microphotograph of the mass of sperm inside the copulatory bursa, with a multilayered concentric organization of the circular structures (ZMA V.Pl. 7269.1).

Fig. 3 in A new species of freshwater flatworm (Platyhelminthes, Tricladida, Dendrocoelidae) inhabiting a chemoautotrophic groundwater ecosystem in Romania

Fig. 3. Dendrocoelum obstinatum Stocchino & Sluys, sp. nov., holotype (ZMA V.Pl. 7264.1). A. Sagittal reconstruction of the female copulatory apparatus (anterior to the left). B. Sagittal reconstruction of the male copulatory apparatus (anterior to the left). Only the terminal portions of the spermiducal vesicles are drawn. C. Sagittal reconstruction of the male copulatory apparatus with the cervix-like protrusion (anterior to the left).

Fig. 2 in A new species of freshwater flatworm (Platyhelminthes, Tricladida, Dendrocoelidae) inhabiting a chemoautotrophic groundwater ecosystem in Romania

Fig. 2. Dendrocoelum obstinatum Stocchino & Sluys, sp. nov. Sketch of the ventral view of a preserved (Bouin's fluid) specimen from Movile Cave.

Fig. 1 in A new species of freshwater flatworm (Platyhelminthes, Tricladida, Dendrocoelidae) inhabiting a chemoautotrophic groundwater ecosystem in Romania

Fig. 1. Geographic distribution of freshwater planarians of the genus Dendrocoelum recorded from Romania. ▲: unspecified locality of D. lacteum Müller, 1774. Rectangular inset (bottom) corresponds with enlarged area, showing the collection sites of D. obstinatum Stocchino & Sluys, sp. nov. indicated by blue stars (see also Table 1).

opencc-zeroDec 2015View details →

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Data from: Urban trees reduce nutrient leaching to groundwater

Many urban waterways suffer from excess nitrogen (N) and phosphorus (P) feeding algal blooms, which cause lower water clarity and oxygen levels, bad odor and taste, and the loss of desirable species. Nutrient movement from land to water is likely to be influenced by urban vegetation, but there are few empirical studies addressing this. In this study, we examined whether or not urban trees can reduce nutrient leaching to groundwater, an important nutrient export pathway that has received less attention than stormwater. We characterized leaching beneath thirty-three trees of fourteen species, and seven open turfgrass areas, across three city parks in Saint Paul, Minnesota. We installed lysimeters at 60 cm depth to collect soil water approximately biweekly from July 2011 through October 2013, except during winter and drought periods, measured dissolved organic carbon (C), N, and P in soil water, and modeled water fluxes using the BROOK90 hydrologic model. We also measured soil nutrient pools (bulk C and N, KCl-extractable inorganic N, Brays-P), tree tissue nutrient concentrations (C, N, and P of green leaves, leaf litter, and roots), and canopy size parameters (leaf biomass, leaf area index) to explore correlations with nutrient leaching. Trees had similar or lower N leaching than turfgrass in 2012 but higher N leaching in 2013; trees reduced P leaching compared with turfgrass in both 2012 and 2013, with lower leaching under deciduous than evergreen trees. Scaling up our measurements to an urban subwatershed of the Mississippi River (~17,400 ha, containing roughly 1.5 million trees), we estimated that trees reduced P leaching to groundwater by 533 kg in 2012 (0.031 kg/ha or 3.1 kg/km2) and 1201 kg in 2013 (0.069 kg/ha or 6.9 kg/km2). Removing these same amounts of P using stormwater infrastructure would cost $2.2 million and $5.0 million per year (2012 and 2013 removal amounts, respectively).