flopy.mf6.modflow.mfgwfmaw module

class ModflowGwfmaw(model, loading_package=False, auxiliary=None, boundnames=None, print_input=None, print_head=None, print_flows=None, save_flows=None, head_filerecord=None, budget_filerecord=None, no_well_storage=None, flow_correction=None, flowing_wells=None, shutdown_theta=None, shutdown_kappa=None, timeseries=None, observations=None, mover=None, nmawwells=None, packagedata=None, connectiondata=None, perioddata=None, filename=None, pname=None, parent_file=None)[source]

Bases: flopy.mf6.mfpackage.MFPackage

ModflowGwfmaw defines a maw package within a gwf6 model.

Parameters:
  • model (MFModel) – Model that this package is a part of. Package is automatically added to model when it is initialized.
  • loading_package (bool) – Do not set this parameter. It is intended for debugging and internal processing purposes only.
  • auxiliary ([string]) –
    • auxiliary (string) defines an array of one or more auxiliary variable names. There is no limit on the number of auxiliary variables that can be provided on this line; however, lists of information provided in subsequent blocks must have a column of data for each auxiliary variable name defined here. The number of auxiliary variables detected on this line determines the value for naux. Comments cannot be provided anywhere on this line as they will be interpreted as auxiliary variable names. Auxiliary variables may not be used by the package, but they will be available for use by other parts of the program. The program will terminate with an error if auxiliary variables are specified on more than one line in the options block.
  • boundnames (boolean) –
    • boundnames (boolean) keyword to indicate that boundary names may be provided with the list of multi-aquifer well cells.
  • print_input (boolean) –
    • print_input (boolean) keyword to indicate that the list of multi- aquifer well information will be written to the listing file immediately after it is read.
  • print_head (boolean) –
    • print_head (boolean) keyword to indicate that the list of multi- aquifer well heads will be printed to the listing file for every stress period in which “HEAD PRINT” is specified in Output Control. If there is no Output Control option and PRINT_HEAD is specified, then heads are printed for the last time step of each stress period.
  • print_flows (boolean) –
    • print_flows (boolean) keyword to indicate that the list of multi- aquifer well flow rates will be printed to the listing file for every stress period time step in which “BUDGET PRINT” is specified in Output Control. If there is no Output Control option and “PRINT_FLOWS” is specified, then flow rates are printed for the last time step of each stress period.
  • save_flows (boolean) –
    • save_flows (boolean) keyword to indicate that multi-aquifer well flow terms will be written to the file specified with “BUDGET FILEOUT” in Output Control.
  • head_filerecord ([headfile]) –
    • headfile (string) name of the binary output file to write head information.
  • budget_filerecord ([budgetfile]) –
    • budgetfile (string) name of the binary output file to write budget information.
  • no_well_storage (boolean) –
    • no_well_storage (boolean) keyword that deactivates inclusion of well storage contributions to the multi-aquifer well package continuity equation.
  • flow_correction (boolean) –
    • flow_correction (boolean) keyword that activates flow corrections in cases where the head in a multi-aquifer well is below the bottom of the screen for a connection or the head in a convertible cell connected to a multi-aquifer well is below the cell bottom. When flow corrections are activated, unit head gradients are used to calculate the flow between a multi-aquifer well and a connected GWF cell. By default, flow corrections are not made.
  • flowing_wells (boolean) –
    • flowing_wells (boolean) keyword that activates the flowing wells option for the multi-aquifer well package.
  • shutdown_theta (double) –
    • shutdown_theta (double) value that defines the weight applied to discharge rate for wells that limit the water level in a discharging well (defined using the HEAD_LIMIT keyword in the stress period data). SHUTDOWN_THETA is used to control discharge rate oscillations when the flow rate from the aquifer is less than the specified flow rate from the aquifer to the well. Values range between 0.0 and 1.0, and larger values increase the weight (decrease under-relaxation) applied to the well discharge rate. The HEAD_LIMIT option has been included to facilitate backward compatibility with previous versions of MODFLOW but use of the RATE_SCALING option instead of the HEAD_LIMIT option is recommended. By default, SHUTDOWN_THETA is 0.7.
  • shutdown_kappa (double) –
    • shutdown_kappa (double) value that defines the weight applied to discharge rate for wells that limit the water level in a discharging well (defined using the HEAD_LIMIT keyword in the stress period data). SHUTDOWN_KAPPA is used to control discharge rate oscillations when the flow rate from the aquifer is less than the specified flow rate from the aquifer to the well. Values range between 0.0 and 1.0, and larger values increase the weight applied to the well discharge rate. The HEAD_LIMIT option has been included to facilitate backward compatibility with previous versions of MODFLOW but use of the RATE_SCALING option instead of the HEAD_LIMIT option is recommended. By default, SHUTDOWN_KAPPA is 0.0001.
  • timeseries ({varname:data} or timeseries data) –
    • Contains data for the ts package. Data can be stored in a dictionary containing data for the ts package with variable names as keys and package data as values. Data just for the timeseries variable is also acceptable. See ts package documentation for more information.
  • observations ({varname:data} or continuous data) –
    • Contains data for the obs package. Data can be stored in a dictionary containing data for the obs package with variable names as keys and package data as values. Data just for the observations variable is also acceptable. See obs package documentation for more information.
  • mover (boolean) –
    • mover (boolean) keyword to indicate that this instance of the MAW Package can be used with the Water Mover (MVR) Package. When the MOVER option is specified, additional memory is allocated within the package to store the available, provided, and received water.
  • nmawwells (integer) –
    • nmawwells (integer) integer value specifying the number of multi- aquifer wells that will be simulated for all stress periods.
  • packagedata ([wellno, radius, bottom, strt, condeqn, ngwfnodes, aux,) –
    boundname]
    • wellno (integer) integer value that defines the well number associated with the specified PACKAGEDATA data on the line. WELLNO must be greater than zero and less than or equal to NMAWWELLS. Multi- aquifer well information must be specified for every multi-aquifer well or the program will terminate with an error. The program will also terminate with an error if information for a multi-aquifer well is specified more than once. This argument is an index variable, which means that it should be treated as zero-based when working with FloPy and Python. Flopy will automatically subtract one when loading index variables and add one when writing index variables.
    • radius (double) radius for the multi-aquifer well. The program will terminate with an error if the radius is less than or equal to zero.
    • bottom (double) bottom elevation of the multi-aquifer well. If CONDEQN is SPECIFIED, THIEM, SKIN, or COMPOSITE, BOTTOM is set to the cell bottom in the lowermost GWF cell connection in cases where the specified well bottom is above the bottom of this GWF cell. If CONDEQN is MEAN, BOTTOM is set to the lowermost GWF cell connection screen bottom in cases where the specified well bottom is above this value. The bottom elevation defines the lowest well head that will be simulated when the NEWTON UNDER_RELAXATION option is specified in the GWF model name file. The bottom elevation is also used to calculate volumetric storage in the well.
    • strt (double) starting head for the multi-aquifer well. The program will terminate with an error if the starting head is less than the specified well bottom.
    • condeqn (string) character string that defines the conductance equation that is used to calculate the saturated conductance for the multi-aquifer well. Possible multi-aquifer well CONDEQN strings include: SPECIFIED–character keyword to indicate the multi-aquifer well saturated conductance will be specified. THIEM–character keyword to indicate the multi-aquifer well saturated conductance will be calculated using the Thiem equation, which considers the cell top and bottom, aquifer hydraulic conductivity, and effective cell and well radius. SKIN–character keyword to indicate that the multi- aquifer well saturated conductance will be calculated using the cell top and bottom, aquifer and screen hydraulic conductivity, and well and skin radius. CUMULATIVE–character keyword to indicate that the multi-aquifer well saturated conductance will be calculated using a combination of the Thiem and SKIN equations. MEAN–character keyword to indicate the multi-aquifer well saturated conductance will be calculated using the aquifer and screen top and bottom, aquifer and screen hydraulic conductivity, and well and skin radius. The CUMULATIVE conductance equation is identical to the SKIN LOSSTYPE in the Multi-Node Well (MNW2) package for MODFLOW-2005. The program will terminate with an error condition if CONDEQN is SKIN or CUMULATIVE and the calculated saturated conductance is less than zero; if an error condition occurs, it is suggested that the THEIM or MEAN conductance equations be used for these multi-aquifer wells.
    • ngwfnodes (integer) integer value that defines the number of GWF nodes connected to this (WELLNO) multi-aquifer well. NGWFNODES must be greater than zero.
    • aux (double) represents the values of the auxiliary variables for each multi-aquifer well. The values of auxiliary variables must be present for each multi-aquifer well. The values must be specified in the order of the auxiliary variables specified in the OPTIONS block. If the package supports time series and the Options block includes a TIMESERIESFILE entry (see the “Time-Variable Input” section), values can be obtained from a time series by entering the time-series name in place of a numeric value.
    • boundname (string) name of the multi-aquifer well cell. BOUNDNAME is an ASCII character variable that can contain as many as 40 characters. If BOUNDNAME contains spaces in it, then the entire name must be enclosed within single quotes.
  • connectiondata ([wellno, icon, cellid, scrn_top, scrn_bot, hk_skin,) –
    radius_skin]
    • wellno (integer) integer value that defines the well number associated with the specified CONNECTIONDATA data on the line. WELLNO must be greater than zero and less than or equal to NMAWWELLS. Multi- aquifer well connection information must be specified for every multi-aquifer well connection to the GWF model (NGWFNODES) or the program will terminate with an error. The program will also terminate with an error if connection information for a multi-aquifer well connection to the GWF model is specified more than once. This argument is an index variable, which means that it should be treated as zero-based when working with FloPy and Python. Flopy will automatically subtract one when loading index variables and add one when writing index variables.
    • icon (integer) integer value that defines the GWF connection number for this multi-aquifer well connection entry. ICONN must be greater than zero and less than or equal to NGWFNODES for multi-aquifer well WELLNO. This argument is an index variable, which means that it should be treated as zero-based when working with FloPy and Python. Flopy will automatically subtract one when loading index variables and add one when writing index variables.
    • cellid ((integer, …)) is the cell identifier, and depends on the type of grid that is used for the simulation. For a structured grid that uses the DIS input file, CELLID is the layer, row, and column. For a grid that uses the DISV input file, CELLID is the layer and CELL2D number. If the model uses the unstructured discretization (DISU) input file, CELLID is the node number for the cell. One or more screened intervals can be connected to the same CELLID if CONDEQN for a well is MEAN. The program will terminate with an error if MAW wells using SPECIFIED, THIEM, SKIN, or CUMULATIVE conductance equations have more than one connection to the same CELLID. This argument is an index variable, which means that it should be treated as zero-based when working with FloPy and Python. Flopy will automatically subtract one when loading index variables and add one when writing index variables.
    • scrn_top (double) value that defines the top elevation of the screen for the multi-aquifer well connection. If CONDEQN is SPECIFIED, THIEM, SKIN, or COMPOSITE, SCRN_TOP can be any value and is set to the top of the cell. If CONDEQN is MEAN, SCRN_TOP is set to the multi-aquifer well connection cell top if the specified value is greater than the cell top. The program will terminate with an error if the screen top is less than the screen bottom.
    • scrn_bot (double) value that defines the bottom elevation of the screen for the multi-aquifer well connection. If CONDEQN is SPECIFIED, THIEM, SKIN, or COMPOSITE, SCRN_BOT can be any value is set to the bottom of the cell. If CONDEQN is MEAN, SCRN_BOT is set to the multi-aquifer well connection cell bottom if the specified value is less than the cell bottom. The program will terminate with an error if the screen bottom is greater than the screen top.
    • hk_skin (double) value that defines the skin (filter pack) hydraulic conductivity (if CONDEQN for the multi-aquifer well is SKIN, CUMULATIVE, or MEAN) or conductance (if CONDEQN for the multi-aquifer well is SPECIFIED) for each GWF node connected to the multi-aquifer well (NGWFNODES). If CONDEQN is SPECIFIED, HK_SKIN must be greater than or equal to zero. HK_SKIN can be any value if CONDEQN is THIEM. Otherwise, HK_SKIN must be greater than zero. If CONDEQN is SKIN, the contrast between the cell transmissivity (the product of geometric mean horizontal hydraulic conductivity and the cell thickness) and the well transmissivity (the product of HK_SKIN and the screen thicknesses) must be greater than one in node CELLID or the program will terminate with an error condition; if an error condition occurs, it is suggested that the HK_SKIN be reduced to a value less than K11 and K22 in node CELLID or the THEIM or MEAN conductance equations be used for these multi-aquifer wells.
    • radius_skin (double) real value that defines the skin radius (filter pack radius) for the multi-aquifer well. RADIUS_SKIN can be any value if CONDEQN is SPECIFIED or THIEM. If CONDEQN is SKIN, CUMULATIVE, or MEAN, the program will terminate with an error if RADIUS_SKIN is less than or equal to the RADIUS for the multi-aquifer well.
  • perioddata ([wellno, mawsetting]) –
    • wellno (integer) integer value that defines the well number associated with the specified PERIOD data on the line. WELLNO must be greater than zero and less than or equal to NMAWWELLS. This argument is an index variable, which means that it should be treated as zero- based when working with FloPy and Python. Flopy will automatically subtract one when loading index variables and add one when writing index variables.
    • mawsetting (keystring) line of information that is parsed into a keyword and values. Keyword values that can be used to start the MAWSETTING string include: STATUS, FLOWING_WELL, RATE, WELL_HEAD, HEAD_LIMIT, SHUT_OFF, RATE_SCALING, and AUXILIARY.
      status : [string]
      • status (string) keyword option to define well status. STATUS can be ACTIVE, INACTIVE, or CONSTANT. By default, STATUS is ACTIVE.
      flowing_wellrecord : [fwelev, fwcond, fwrlen]
      • fwelev (double) elevation used to determine whether or not the well is flowing.
      • fwcond (double) conductance used to calculate the discharge of a free flowing well. Flow occurs when the head in the well is above the well top elevation (FWELEV).
      • fwrlen (double) length used to reduce the conductance of the flowing well. When the head in the well drops below the well top plus the reduction length, then the conductance is reduced. This reduction length can be used to improve the stability of simulations with flowing wells so that there is not an abrupt change in flowing well rates.
      rate : [double]
      • rate (double) is the volumetric pumping rate for the multi- aquifer well. A positive value indicates recharge and a negative value indicates discharge (pumping). RATE only applies to active (IBOUND \(>\) 0) multi-aquifer wells. If the Options block includes a TIMESERIESFILE entry (see the “Time-Variable Input” section), values can be obtained from a time series by entering the time-series name in place of a numeric value. By default, the RATE for each multi-aquifer well is zero.
      well_head : [double]
      • well_head (double) is the head in the multi-aquifer well. WELL_HEAD is only applied to constant head (STATUS is CONSTANT) and inactive (STATUS is INACTIVE) multi-aquifer wells. If the Options block includes a TIMESERIESFILE entry (see the “Time-Variable Input” section), values can be obtained from a time series by entering the time-series name in place of a numeric value. The program will terminate with an error if WELL_HEAD is less than the bottom of the well.
      head_limit : [string]
      • head_limit (string) is the limiting water level (head) in the well, which is the minimum of the well RATE or the well inflow rate from the aquifer. HEAD_LIMIT can be applied to extraction wells (RATE \(<\) 0) or injection wells (RATE \(>\) 0). HEAD_LIMIT can be deactivated by specifying the text string `OFF’. The HEAD_LIMIT option is based on the HEAD_LIMIT functionality available in the MNW2~citep{konikow2009} package for MODFLOW-2005. The HEAD_LIMIT option has been included to facilitate backward compatibility with previous versions of MODFLOW but use of the RATE_SCALING option instead of the HEAD_LIMIT option is recommended. By default, HEAD_LIMIT is `OFF’.
      shutoffrecord : [minrate, maxrate]
      • minrate (double) is the minimum rate that a well must exceed to shutoff a well during a stress period. The well will shut down during a time step if the flow rate to the well from the aquifer is less than MINRATE. If a well is shut down during a time step, reactivation of the well cannot occur until the next time step to reduce oscillations. MINRATE must be less than maxrate.
      • maxrate (double) is the maximum rate that a well must exceed to reactivate a well during a stress period. The well will reactivate during a timestep if the well was shutdown during the previous time step and the flow rate to the well from the aquifer exceeds maxrate. Reactivation of the well cannot occur until the next time step if a well is shutdown to reduce oscillations. maxrate must be greater than MINRATE.
      rate_scalingrecord : [pump_elevation, scaling_length]
      • pump_elevation (double) is the elevation of the multi-aquifer well pump (PUMP_ELEVATION). PUMP_ELEVATION should not be less than the bottom elevation (BOTTOM) of the multi-aquifer well.
      • scaling_length (double) height above the pump elevation (SCALING_LENGTH). If the simulated well head is below this elevation (pump elevation plus the scaling length), then the pumping rate is reduced.
      auxiliaryrecord : [auxname, auxval]
      • auxname (string) name for the auxiliary variable to be assigned AUXVAL. AUXNAME must match one of the auxiliary variable names defined in the OPTIONS block. If AUXNAME does not match one of the auxiliary variable names defined in the OPTIONS block the data are ignored.
      • auxval (double) value for the auxiliary variable. If the Options block includes a TIMESERIESFILE entry (see the “Time- Variable Input” section), values can be obtained from a time series by entering the time-series name in place of a numeric value.
  • filename (String) – File name for this package.
  • pname (String) – Package name for this package.
  • parent_file (MFPackage) – Parent package file that references this package. Only needed for utility packages (mfutl*). For example, mfutllaktab package must have a mfgwflak package parent_file.
auxiliary = <flopy.mf6.data.mfdatautil.ListTemplateGenerator object>
budget_filerecord = <flopy.mf6.data.mfdatautil.ListTemplateGenerator object>
connectiondata = <flopy.mf6.data.mfdatautil.ListTemplateGenerator object>
dfn = [['block options', 'name auxiliary', 'type string', 'shape (naux)', 'reader urword', 'optional true'], ['block options', 'name boundnames', 'type keyword', 'shape', 'reader urword', 'optional true'], ['block options', 'name print_input', 'type keyword', 'reader urword', 'optional true'], ['block options', 'name print_head', 'type keyword', 'reader urword', 'optional true'], ['block options', 'name print_flows', 'type keyword', 'reader urword', 'optional true'], ['block options', 'name save_flows', 'type keyword', 'reader urword', 'optional true'], ['block options', 'name head_filerecord', 'type record head fileout headfile', 'shape', 'reader urword', 'tagged true', 'optional true'], ['block options', 'name head', 'type keyword', 'shape', 'in_record true', 'reader urword', 'tagged true', 'optional false'], ['block options', 'name headfile', 'type string', 'preserve_case true', 'shape', 'in_record true', 'reader urword', 'tagged false', 'optional false'], ['block options', 'name budget_filerecord', 'type record budget fileout budgetfile', 'shape', 'reader urword', 'tagged true', 'optional true'], ['block options', 'name budget', 'type keyword', 'shape', 'in_record true', 'reader urword', 'tagged true', 'optional false'], ['block options', 'name fileout', 'type keyword', 'shape', 'in_record true', 'reader urword', 'tagged true', 'optional false'], ['block options', 'name budgetfile', 'type string', 'preserve_case true', 'shape', 'in_record true', 'reader urword', 'tagged false', 'optional false'], ['block options', 'name no_well_storage', 'type keyword', 'reader urword', 'optional true'], ['block options', 'name flow_correction', 'type keyword', 'reader urword', 'optional true'], ['block options', 'name flowing_wells', 'type keyword', 'reader urword', 'optional true'], ['block options', 'name shutdown_theta', 'type double precision', 'reader urword', 'optional true'], ['block options', 'name shutdown_kappa', 'type double precision', 'reader urword', 'optional true'], ['block options', 'name ts_filerecord', 'type record ts6 filein ts6_filename', 'shape', 'reader urword', 'tagged true', 'optional true', 'construct_package ts', 'construct_data timeseries', 'parameter_name timeseries'], ['block options', 'name ts6', 'type keyword', 'shape', 'in_record true', 'reader urword', 'tagged true', 'optional false'], ['block options', 'name filein', 'type keyword', 'shape', 'in_record true', 'reader urword', 'tagged true', 'optional false'], ['block options', 'name ts6_filename', 'type string', 'preserve_case true', 'in_record true', 'reader urword', 'optional false', 'tagged false'], ['block options', 'name obs_filerecord', 'type record obs6 filein obs6_filename', 'shape', 'reader urword', 'tagged true', 'optional true', 'construct_package obs', 'construct_data continuous', 'parameter_name observations'], ['block options', 'name obs6', 'type keyword', 'shape', 'in_record true', 'reader urword', 'tagged true', 'optional false'], ['block options', 'name 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status flowing_wellrecord rate well_head head_limit shutoffrecord rate_scalingrecord auxiliaryrecord', 'shape', 'tagged false', 'in_record true', 'reader urword'], ['block period', 'name status', 'type string', 'shape', 'tagged true', 'in_record true', 'reader urword'], ['block period', 'name flowing_wellrecord', 'type record flowing_well fwelev fwcond fwrlen', 'shape', 'tagged', 'in_record true', 'reader urword'], ['block period', 'name flowing_well', 'type keyword', 'shape', 'in_record true', 'reader urword'], ['block period', 'name fwelev', 'type double precision', 'shape', 'tagged false', 'in_record true', 'reader urword'], ['block period', 'name fwcond', 'type double precision', 'shape', 'tagged false', 'in_record true', 'reader urword'], ['block period', 'name fwrlen', 'type double precision', 'shape', 'tagged false', 'in_record true', 'reader urword'], ['block period', 'name rate', 'type double precision', 'shape', 'tagged true', 'in_record true', 'reader urword', 'time_series true'], ['block period', 'name well_head', 'type double precision', 'shape', 'tagged true', 'in_record true', 'reader urword', 'time_series true'], ['block period', 'name head_limit', 'type string', 'shape', 'tagged true', 'in_record true', 'reader urword'], ['block period', 'name shutoffrecord', 'type record shut_off minrate maxrate', 'shape', 'tagged', 'in_record true', 'reader urword'], ['block period', 'name shut_off', 'type keyword', 'shape', 'in_record true', 'reader urword'], ['block period', 'name minrate', 'type double precision', 'shape', 'tagged false', 'in_record true', 'reader urword'], ['block period', 'name maxrate', 'type double precision', 'shape', 'tagged false', 'in_record true', 'reader urword'], ['block period', 'name rate_scalingrecord', 'type record rate_scaling pump_elevation scaling_length', 'shape', 'tagged', 'in_record true', 'reader urword'], ['block period', 'name rate_scaling', 'type keyword', 'shape', 'in_record true', 'reader urword'], ['block period', 'name pump_elevation', 'type double precision', 'shape', 'tagged false', 'in_record true', 'reader urword'], ['block period', 'name scaling_length', 'type double precision', 'shape', 'tagged false', 'in_record true', 'reader urword'], ['block period', 'name auxiliaryrecord', 'type record auxiliary auxname auxval', 'shape', 'tagged', 'in_record true', 'reader urword'], ['block period', 'name auxiliary', 'type keyword', 'shape', 'in_record true', 'reader urword'], ['block period', 'name auxname', 'type string', 'shape', 'tagged false', 'in_record true', 'reader urword'], ['block period', 'name auxval', 'type double precision', 'shape', 'tagged false', 'in_record true', 'reader urword', 'time_series true']]
dfn_file_name = 'gwf-maw.dfn'
head_filerecord = <flopy.mf6.data.mfdatautil.ListTemplateGenerator object>
obs_filerecord = <flopy.mf6.data.mfdatautil.ListTemplateGenerator object>
package_abbr = 'gwfmaw'
packagedata = <flopy.mf6.data.mfdatautil.ListTemplateGenerator object>
perioddata = <flopy.mf6.data.mfdatautil.ListTemplateGenerator object>
ts_filerecord = <flopy.mf6.data.mfdatautil.ListTemplateGenerator object>