cdsspy

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CDSS REST Web Services

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The goal of cdsspy is to provide functions that help Python users to navigate, explore, and make requests to the CDSS REST API web service.

The Colorado’s Decision Support Systems (CDSS) is a water management system created and developed by the Colorado Water Conservation Board (CWCB) and the Colorado Division of Water Resources (DWR).

Thank you to those at CWCB and DWR for providing an accessible and well documented REST API!

See cdssr, for the R version of this package

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• cdssr (R)

• cdssr documentation

• cdsspy (Python)

• cdsspy documentation

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Installation

Install the latest version of cdsspy from PyPI:

pip install cdsspy

Available endpoints

Below is a table of all of the CDSS API endpoints cdsspy provides functions for.

-	Function	Description	Endpoint
1	get_admin_calls()	Returns list of active/historic administrative calls	administrativecalls/active
2	get_structures()	Returns list of administrative structures	structures
3	get_structures_divrec_ts()	Returns list of diversion/release records based on WDID	structures/divrec/divrec
4	get_structures_stage_ts()	Returns list of stage/volume records based on WDID	structures/divrec/stagevolume
5	get_climate_stations()	Returns Climate Stations	climatedata/climatestations
6	get_climate_ts()	Returns Climate Station Time Series (day, month, year)	climatedata/climatestationts
7	get_climate_frostdates()	Returns Climate Station Frost Dates	climatedata/climatestationfrostdates
8	get_gw_gplogs_wells()	Returns Groundwater GeophysicalLogsWell from filters	groundwater/geophysicallogs/
9	get_gw_gplogs_geologpicks()	Returns Groundwater Geophysical Log picks by well ID	groundwater/geophysicallogs/
10	get_gw_wl_wells()	Returns WaterLevelsWell from filters	groundwater/waterlevels/wells
11	get_gw_wl_wellmeasures()	Returns Groundwater Measurements	groundwater/waterlevels/wellmeasurements
12	get_reference_tbl()	Returns reference tables list	referencetables/
13	get_sw_stations()	Returns Surface Water Station info	surfacewater/surfacewaterstations
14	get_sw_ts()	Returns Surface Water Time Series	surfacewater/surfacewaterts
15	get_telemetry_stations()	Returns telemetry stations and their most recent parameter reading	telemetrystations/telemetrystation
16	get_telemetry_ts()	Returns telemetry time series data (raw, hour, day)	telemetrystations/telemetrytimeseries
17	get_water_rights_netamount()	Returns current status of a water right based on all of its court decreed actions	waterrights/netamount
18	get_water_rights_trans()	Returns court decreed actions that affect amount and use(s) that can be used by each water right	waterrights/transaction
19	get_call_analysis_wdid()	Performs a call analysis that returns a time series showing the percentage of each day that the specified WDID and priority was out of priority and the downstream call in priority	analysisservices/callanalysisbywdid
20	get_source_route_framework()	Returns the DWR source route framework reference table for the criteria specified	analysisservices/watersourcerouteframework

Identify query inputs using reference tables

The get_reference_tbl() function will return tables that makes it easier to know what information should be supplied to the data retrieval functions in cdsspy. For more information on the source reference tables click here.

# available parameters for telemetry stations
telemetry_params = cdsspy.get_reference_tbl(
    table_name = "telemetryparams"
    )

	Parameter
0	AIRTEMP
1	BAR_P
2	BATTERY
3	COND
4	D1
5	D2
6	DISCHRG
7	DISCHRG1
8	DISCHRG2
9	DISCHRG3
10	DISCHRG4
11	ELEV

Locate structures

cdsspy provides functions for locating structures/stations/wells/sites by providing a spatial extent, water district, division, county, designated basin, or management district to the functions in the table below. Site data can also be retrieved by providing the site specific abbreviations, GNIS IDs, USGS IDs, WDIDs, or Well IDs.

-	Function	Description	Endpoint
1	get_structures()	Returns list of administrative structures	structures
2	get_climate_stations()	Returns Climate Stations	climatedata/climatestations
3	get_gw_gplogs_wells()	Returns Groundwater GeophysicalLogsWell from filters	groundwater/geophysicallogs/
4	get_gw_wl_wells()	Returns WaterLevelsWell from filters	groundwater/waterlevels/wells
5	get_sw_stations()	Returns Surface Water Station info	surfacewater/surfacewaterstations
6	get_telemetry_stations()	Returns telemetry stations and their most recent parameter reading	telemetrystations/telemetrystation

Example: Locating telemetry stations by county:

# identify telemetry stations in Boulder County
stations  = cdsspy.get_telemetry_stations(
    county = "Boulder"
    )

Example: Locating telemetry stations around a point

# identify telemetry stations within a 15 mile radius of the center point of Boulder County
stations  = cdsspy.get_telemetry_stations(
    aoi    = [-105.358164, 40.092608],
    radius = 15
    )

Example: Locating telemetry stations within a spatial extent

A masking operation is performed when a location search is done using a polygon. This ensures that the function only returns points that are within the given polygon.

# identify telemetry stations 15 miles around the centroid of a polygon
stations  = cdsspy.get_telemetry_stations(
    aoi    = geopandas.read_file("example-data/boulder_county.gpkg")
    radius = 15
    )

This gif highlights the masking process that happens when the aoi argument is given a polygon

Retrieve time series data

The functions in the table below retrieve time series data from the various time series related CDSS API endpoints.

-	Function	Description	Endpoint
1	get_structures_divrec_ts()	Returns list of diversion/release records based on WDID	structures/divrec/divrec
2	get_structures_stage_ts()	Returns list of stage/volume records based on WDID	structures/divrec/stagevolume
3	get_climate_ts()	Returns Climate Station Time Series (day, month, year)	climatedata/climatestationts
4	get_gw_wl_wellmeasures()	Returns Groundwater Measurements	groundwater/waterlevels/wellmeasurements
5	get_sw_ts()	Returns Surface Water Time Series	surfacewater/surfacewaterts
6	get_telemetry_ts()	Returns telemetry time series data (raw, hour, day)	telemetrystations/telemetrytimeseries

Example: Daily discharge at a telemetry station

We can then take a station abbreviations from the get_telemetry_stations() call, a parameter from the get_reference_tbl() call, and use this information as inputs into the get_telemetry_ts() function.

The function below returns a dataframe of daily discharge for the "ANDDITCO" site between 2015-2022.

# Daily discharge at "ANDDITCO" telemetry station
discharge_ts   = cdsspy.get_telemetry_ts(
    abbrev         = "ANDDITCO",     # Site abbreviation from the outputs of get_telemetry_stations()
    parameter      = "DISCHRG",      # Desired parameter, identified by the get_reference_tbl()
    start_date     = "2015-01-01",   # Starting date
    end_date       = "2022-01-01",   # Ending date
    timescale      = "day"           # select daily timescale
    )

Example: Retrieve Diversion records for multiple structures

Some of the CDSS API endpoints allow users to request data from multiple structures if you provide a list of IDs. If we want to get diversion data from multiple structure locations, we'll need to get a list of WDIDs. We can get a list WDIDs within a given area by:

1. Executing a spatial search using get_structures()
2. Selecting the WDIDs of interest from the search results
3. Providing the WDIDs as a vector to get_structures_divrec_ts()

# 1. Executing a spatial search
structures = cdsspy.get_structures(
    aoi    = [-105.3578, 40.09244],
    radius = 5
    )

# 2. Selecting the WDID's of interest from search results and putting WDIDs into a list
ditch_wdids = structures[(structures["ciuCode"] == "A") & (structures["structureType"] == "DITCH")]
ditch_wdids = list(ditch_wdids['wdid'])

# 3. Providing the WDID's as a list to get_structures_divrec_ts()
diversion_rec  = cdsspy.get_structures_divrec_ts(
    wdid           = ditch_wdids,
    wc_identifier  = "diversion",
    timescale      = "month"
    )

Note: Data availability can vary between structures (i.e. Missing data, not all structures have every data type/temporal resolution available, etc.)

Retrieve groundwater data

The get_gw_() set of functions lets users retrieve data from the various groundwater related API endpoints shown in the table below:

-	Function	Endpoint
1	get_gw_wl_wellmeasures()	api/v2/groundwater/waterlevels/wellmeasurements
2	get_gw_wl_wells()	api/v2/groundwater/waterlevels/wells
3	get_gw_gplogs_wells()	api/v2/groundwater/geophysicallogs/wells
4	get_gw_gplogs_geologpicks()	api/v2/groundwater/geophysicallogs/geoplogpicks

Here we will retrieve groundwater well measurement data for Well ID 1274 between 2021-2022.

# Request wellmeasurements endpoint (api/v2/groundwater/waterlevels/wellmeasurements)
well_measure = cdsspy.get_gw_wl_wellmeasures(
    wellid     = "1274",
    start_date = "1990-01-01",
    end_date   = "2022-01-01"
    )