tidyhydat (version 0.5.6)

hy_monthly_levels: Extract monthly levels information from the HYDAT database

Description

Tidy data of monthly river or lake levels information from the DLY_LEVELS HYDAT table. station_number and prov_terr_state_loc can both be supplied. If both are omitted all values from the hy_stations table are returned. That is a large vector for hy_monthly_levels.

Usage

hy_monthly_levels(
  station_number = NULL,
  hydat_path = NULL,
  prov_terr_state_loc = NULL,
  start_date = NULL,
  end_date = NULL
)

Value

A tibble of monthly levels.

Format

A tibble with 8 variables:

STATION_NUMBER

Unique 7 digit Water Survey of Canada station number

Year

Year of record.

Month

Numeric month value

Full_month

Logical value is there is full record from Month

No_days

Number of days in that month

Sum_stat

Summary statistic being used.

Value

Value of the measurement in metres.

Date_occurred

Observation date. Formatted as a Date class. MEAN is a annual summary and therefore has an NA value for Date.

Arguments

station_number

A seven digit Water Survey of Canada station number. If this argument is omitted, the value of prov_terr_state_loc is returned.

hydat_path

The path to the hydat database or NULL to use the default location used by download_hydat. It is also possible to pass in an existing src_sqlite such that the database only needs to be opened once per user-level call.

prov_terr_state_loc

Province, state or territory. If this argument is omitted, the value of station_number is returned. See unique(allstations$prov_terr_state_loc). Will also accept CA to return only Canadian stations.

start_date

Leave blank if all dates are required. Date format needs to be in YYYY-MM-DD. Date is inclusive.

end_date

Leave blank if all dates are required. Date format needs to be in YYYY-MM-DD. Date is inclusive.

See Also

Other HYDAT functions: hy_agency_list(), hy_annual_instant_peaks(), hy_annual_stats(), hy_daily_flows(), hy_daily_levels(), hy_daily(), hy_data_symbols, hy_data_types, hy_datum_list(), hy_monthly_flows(), hy_reg_office_list(), hy_sed_daily_loads(), hy_sed_daily_suscon(), hy_sed_monthly_loads(), hy_sed_monthly_suscon(), hy_sed_samples_psd(), hy_sed_samples(), hy_stations(), hy_stn_data_coll(), hy_stn_data_range(), hy_stn_op_schedule(), hy_stn_regulation(), hy_version()

Examples

if (FALSE) {
hy_monthly_levels(station_number = c("02JE013","08MF005"), 
  start_date = "1996-01-01", end_date = "2000-01-01")

hy_monthly_levels(prov_terr_state_loc = "PE")
          }