TSTool / Command / ReadHydroBase
ReadHydroBase command reads one or more time series from the HydroBase database
(see the HydroBase Datastore Appendix.
It is designed to utilize query criteria to process large numbers of time series,
for example for a specific water district and data type.
The default parameter values match the results of TSID for HydroBase.
The Data type, Data interval, and Where command parameters and input fields
are similar to those from the main TSTool interface.
However, whereas the main TSTool interface first requires a query to find the
matching time series list and then an interactive select for specific time series identifiers,
ReadHydroBase command reads the time series list and the corresponding data for the time series.
This can greatly shorten command files and simplify command logic, especially when processing many time series.
The command supports the old-style input name selection (which corresponds to selecting HydroBase via the TSTool login dialog) and the new-style datastore convention (which corresponds to datastore configuration files). In the future, support for the input name may be phased out; however, this will require resolving how the HydroBase selection dialog is migrated to support datastores. Consequently, both approaches are currently supported during the transition.
Data for the location (station, structure, well, etc.) and time series metadata,
as shown in the main TSTool interface, are set as time series properties.
For example, the
longdecdeg values from the
HydroBase vw_CDSS_StationMeasType view
are available as time series properties of the same name.
These properties can be transferred to a table with the
command and processed further with other table commands.
Time series corresponding to diversion records, which include observations for ditches, reservoirs, wells, and other "structures", are handled as follows:
- In general, diversion record values correspond to observations and estimates determined by the State of Colorado and other entities. The accuracy of values is higher for well-maintained measuring devices and lower (or less certain) for third-party data submission. Diversion records are stored in various forms, based on historical approach and to facilitate data collection with limited resources. For example, long-term daily records may be available at large diversion structures whereas other structures may have infrequent data records and/or annual diversion comments. Records for smaller interval (e.g., day) are accumulated to larger interval (month and year). The observations available in diversion records can be further processed to provide additional data values, as described below. Diversion records consist of date, value, and flag (observation code), which can be viewed in TSTool.
FillDivRecordsCarryForward=True(the default), daily total diversion (
DivTotal), daily total reservoir release (
RelTotal), and daily water class (
RelClass) time series have their values carried forward to fill additional zero data values within irrigation years (November to October). The Division of Water Resources does implement some data filling by carrying forward non-zero daily values, indicated with corresponding data flags. In practice, it is common to interpret diversion records by filling in additional zeros and TSTool automates this approach. This technique has been used when processing data for CDSS modeling. Web services by default only return HydroBase diversion record data for observations without additional zero-filling. Therefore, this filling action should only provide additional zero values in an irrigation year where a diversion or release was recorded sometime in the year. Irrigation years with no observations remain as missing after the read. The default behavior is the same as the
FillUsingDivComments=True, daily, monthly, and yearly
DivClasstime series are filled using annual irrigation year (November-October) diversion comments, which indicate when irritation years should be treated as additional zero values. Diversion comments provide additional information but may not always be consistent with diversion records. For example, diversion comments may indicate that a structure did not divert water in a year whereas daily and monthly records show diversions in all or some months. The separate
FillUsingDiversionCommentscommand also is available for filling but may be phased out in the future.
- It also may be appropriate to use infrequent data types (
IRelClass) to supply data; however, because such values may be annual values, additional decisions must be made for how to distribute the values to monthly and daily time series. HydroBase diversion record processing automatically integrates such data into larger-interval diversion records; however, it may not be obvious. The HydroBase web services provide additional data to indicate when infrequent data are included.
- See the
FillPattern, and other commands, which can be used to fill (estimate) values in data gaps after the initial time series are read.
The following dialog is used to edit the command and illustrates the syntax for the command.
Two options are available for matching time series, based on historical software requirements.
The following example illustrates how to read a single time series by specifying the time series identifier.
This approach is essentially equivalent to using the
ReadTimeSeries command but offers HydroBase-specific parameters such as
which are not available in the more general
Specifying a TSID can be used for simple data types such as
DivTotal where the data type matches one time series.
RelClass data type can match multiple time series and therefore requires that the
parameter is specified if a single time series should be matched.
ReadHydroBase Command Editor to Read a Single Time Series (see also the full-size image)
The following figure illustrates how to query multiple time series.
ReadHydroBase Command Editor to Read Multiple Time Series (see also the full-size image)
The command syntax is as follows:
The following older command syntax is updated to the above syntax when a command file is read:
TS Alias = ReadHydroBase(Parameter=Value,...)
||The HydroBase database connection input name to use for the database connection, as initialized by the HydroBase login dialog shown when TSTool starts. When using this approach the TSID will end in
||Use the default HydroBase connection.|
||The HydroBase datastore name to use for the database connection, as per datastore configuration files (see the HydroBase Datastore appendix. When using this approach the TSID will end in
||Use the default (legacy
|The data type to be queried, as documented in the HydroBase Datastore appendix.||None – must be specified.|
||Note: This uses the old SFUTG syntax, not new water class syntax used by web services. The water class if only a single water class should be returned, used when
||All matching water classes.|
|The data interval for the time series, as documented in the HydroBase Datastore appendix (e.g.
||None – must be specified.|
||When reading a single time series, the time series identifier to read. If specified, this parameter will override the
||When reading 1+ time series, the “where” clauses to be applied. The filters match the values in the Where fields in the command editor dialog and the TSTool main interface. The parameters should be named
|If not specified, the query will not be limited and very large numbers of time series may be queried.|
|The alias to assign to the time series, as a literal string or using the special formatting characters listed by the command editor. The alias is a short identifier used by other commands to locate time series for processing, as an alternative to the time series identifier (
||None – must be specified.|
||Start of the period to query, specified as a date/time with a precision that matches the requested data interval.||Read all available data.|
||End of the period to query, specified as a date/time with a precision that matches the requested data interval.||Read all available data.|
||Indicate whether to fill daily
||Data flag set when values are filled if
||Indicate whether to fill diversion and reservoir release time series using diversion comments.||
||If specified as a single character, data flags will be enabled for the time series and each filled value will be tagged with the specified character. The flag can then be used later to label graphs, etc. The flag will be appended to existing flags if necessary.||"not used" value from diversion comment.|
||Indicate the action to be taken if the requested time series is missing, one of:
See the automated tests.