Showing content from https://github.com/ReproducibleQM/NES below:
ReproducibleQM/NES: The National Eutrophication Survey: lake characteristics and historical nutrient concentrations
National Eutrophication Survey
This respository contains a digitally transcribed copy (nes_data.csv) of the National Eutrophication Survey (NES) dataset. The original data can be found in the archival_pdfs folder or by searching: https://www.epa.gov/nscep
variable name description units pdf pdf identifier (474 - 477) integer pagenum page number of the pdf integer storet_code identifier which links measurement to coordinate locations character state state where the water body resides character name name of the water body character county county where the water body resides character lake_type natural or impoundment character drainage_area the total drainage area square kilometers surface_area the area of the water surface sq km mean_depth the volume of the water body divided by the surface area in square meters meters total_inflow the mean of the inflows of all tributaries and the immediate drainage cubic meters per second retention_time a mean value determined by dividing the lake volume, in cubic meters, by the mean annual outflow in cubic meters per unit cof time years or days retention_time_units the units of time for each retention entry years or days alkalinity alkalinity milligrams per liter conductivity conductivity microohms secchi secchi meters tp total phosphorus milligrams per liter po4 orthophosphate milligrams per liter tin total inorganic nitrogen milligrams per liter tn total nitrogen milligrams per liter p_pnt_source_muni municipal point source phosphorus loading kilograms per year p_pnt_source_industrial industrial point source phosphorus loading kilograms per year p_pnt_source_septic septic point source phosphorus loading kilograms per year p_nonpnt_source nonpoint source phosphorus loading kilograms per year p_total total phosphorus loading kilograms per year n_pnt_source_muni municipal point source nitrogen loading kilograms per year n_pnt_source_industrial industrial point source nitrogen loading kilograms per year n_pnt_source_septic septic point source nitrogen loading kilograms per year n_nonpnt_source nonpoint source nitrogen loading kilograms per year n_total total nitrogen loading kilograms per year p_total_out total phosphorus outlet load kilograms per year p_percent_retention percent phosphorus retention percent p_surface_area_loading phosphorus surface area loading grams per square meter per year n_total_out total nitrogen outlet load kilograms per year n_percent_retention percent nitrogen retention percent n_surface_area_loading nitrogen surface area loading grams per square meter per year lat latitude decimal degrees long longitude decimal degrees
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Use the nesR package to generate the files in /02_raw_data.
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Hand check the files in /02_raw_data/merged_data against the pdfs in /01_archival_pdfs.
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Combine files with 05_analysis_scripts/PDF_Merge.R.
We’ve combed the data to try and find all the transciption errors but it’s difficult to catch them all. If you find any errors please open an issue or submit a pull request against the files in /03_qa_data.
Stachelek, J., Ford, C., Kincaid, D., King, K., Miller, H. and Nagelkirk, R., 2018. The National Eutrophication Survey: lake characteristics and historical nutrient concentrations. Earth System Science Data, 10(1), pp.81-86. (https://doi.org/10.5194/essd-10-81-2018)
Stachelek, J. (2017). nesR: Scrape Data from National Eutrophication Survey archival PDFs. R package version 0.1. (https://github.com/jsta/nesR) (https://dx.doi.org/10.5281/zenodo.400258)
Stachelek, J. (2017). nesRdata: National Eutrophication Survey Data Package. R package version 0.1. https://github.com/jsta/nesRdata
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