This database contains water monitoring data collected by NETN in the CVDT format used by data visualization and other systems. This version of the data is not intended to be an archive.

This database contains water monitoring data collected by NETN in the CVDT format used by data visualization and other systems. This version of the data is not intended to be an archive.

Scanned images of hand written Invasive Aquatic Plant Screening Survey forms and maps. Organized by year. See most recent protocol for more information on data collection methods.

Scanned images of hand written 'Rapid Bioassessment Protocol for Use in Streams and Wadeable Rivers' data forms. Organized by year, within year alphabetized by Park and Site. See most recent protocol for more information on data collection methods.

GIS shapefiles of cumulative watersheds models based on NETN's long-term water quality monitoring stations. Holdings include step-by-step instructions on how they were produced. Cumulative watersheds are one of several physical characteristics compiled and entered into the NETN water database (NETN_H2O) and represent the geographic extent from which surface water may have traveled to reach the monitoring site. Periodicity, flood attenuation, chemical buffering capacity, nutrient load, contaminants, invasive species, and water volume are just a few of the metrics that can be better understood when viewed from a cumulative watershed context. In addition to the watershed files, a Standard Operating Proceedure (SOP) documenting the geoprocessing steps required to calculate the area or region from which all surface water drains to NETN’s water quality monitoring sites (i.e. cumulative watershed) is also included. The process steps documented in this SOP were adapted from a University of Virginia Scholar’s Lab lecture assignment of unknown authorship titled “GIS Watershed Delineation Exercise”, circa 2012.

General repository for spatial data and methods used to create bathymetric maps for the water bodies included in NETN's water quality monitoring protocol. Objective of these surveys was to collect depth data of sufficient density to derive a bathymetric map of the lakes and ponds undergoing monitoring by the Network. Basic methods involved superimposing a grid on the pond, navigating to each grid point, drill a hole in the ice and take a depth measurement. The balance of effort and suitable model resolution resulted in the use a varying grid sizes between the water bodies. Grid points were calculated in ArcGIS by applying the free Repeating Shapes tool (http://www.jennessent.com/arcgis/repeat_shapes.htm) to the target waterbody's shoreline polygon. A Trimble RTK (R8 base/rover receivers and a TSC3 Controller) was used to navigate to each of the grid points. A 4 1/2" ice auger connected to a portable drill was then used to make a hole in the ice and a weighted vinyl tape was used to measure the depth to the nearest cm. In some circumstances it was deemed necessary to record more depths: 1) near the edges of the pond where the grid was not an ideal fit and 2) around what was determined to be the deepest part of the pond. We used a combination of tabular and spatial data processing steps to convert depth sampling data to create a digital bathymetric map. Detailed procedures are attached as holdings.

Hourly water level data collected during the growing season in the eight sentinel sites located on Mount Desert Island in Acadia National Park. Dataset also contains hourly precipitation. All units are in cm.

Hourly water level data collected during the growing season in the eight sentinel sites located on Mount Desert Island in Acadia National Park. Dataset also contains hourly precipitation. All units are in cm.