Imports data from the Water Quality Portal, so it could be STORET, USGS, or USDA data. This function gets the data from: https://www.waterqualitydata.us For raw data, use readWQPdata. This function will retrieve the raw data, compress it (summing constituents), then converts it to the Sample dataframe structure. See chapter 7 of the EGRET user guide for more details.
readWQPSample(siteNumber, characteristicName, startDate = "", endDate = "",
verbose = TRUE, legacy = TRUE)A data frame 'Sample' with the following columns:
| Name | Type | Description |
| Date | Date | Date |
| ConcLow | numeric | Lower limit of concentration |
| ConcHigh | numeric | Upper limit of concentration |
| Uncen | integer | Uncensored data (1=TRUE, 0=FALSE) |
| ConcAve | numeric | Average concentration |
| Julian | integer | Number of days since Jan. 1, 1850 |
| Month | integer | Month of the year [1-12] |
| Day | integer | Day of the year [1-366] |
| DecYear | numeric | Decimal year |
| MonthSeq | integer | Number of months since January 1, 1850 |
| SinDY | numeric | Sine of the DecYear |
| CosDY | numeric | Cosine of the DecYear |
character site number. If USGS, it should be in the form :'USGS-XXXXXXXXX...'
character. Either a valid characteristic name, or a 5 digit USGS parameter code.
character starting date for data retrieval in the form YYYY-MM-DD. Default is empty quotes "" which will retrieve the full period of record.
character ending date for data retrieval in the form YYYY-MM-DD. Default is empty quotes "" which will retrieve the full period of record.
logical specifying whether or not to display progress message
logical specifying whether to use the "legacy" WQP services, or
the new ones. Legacy works well for non-USGS sites. For USGS sites it is recommended
to use the readNWISSample function. Default is TRUE.
readWQPdata, dataRetrieval::whatWQPsites,
readWQPqw, compressData, populateSampleColumns
if (FALSE) { # interactive()
# These examples require an internet connection to run
# \donttest{
Sample_All <- readWQPSample('WIDNR_WQX-10032762','Specific conductance', '', '')
# }
}
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