ModelMuse Help

These options from the OUTPUT block of the Farm process will cause the Farm Process to print detailed data of various sources. For a detailed description of the data printed see the the files in doc\Output_Header_Defintion of the MODFLOW-OWHM release.

•WBS_WATER_USE: The Farm process will print detailed information about the water use for each water balance subregion (WBS). Data that is printed include the WBS number, irrigated area, natural evapotranspiration and precipitation, the potential demand, efficiency, and other items.

•FARM_DEMAND_SUPPLY_SUMMARY: The Farm process will print detailed information about the water demand supply by water balance subregion (= farm). Items printed include the farm ID (FID), On farm efficiency (OFE), and other items.

•FARM_BUDGET: The Farm process will print detailed information about all the sources and sinks of water to each farm identified by its Farm ID (FID) along with many budget terms.

•FARM_BUDGET_COMPACT: The Farm process will print detailed information about the main sources and sinks of water to each farm identified by its Farm ID (FID) along with many budget terms.

•FARM_NET_RECHARGE_ARRAY: The Farm process will print the net recharge as an array of cell values.

•FARM_NET_RECHARGE_LIST: The Farm process will print the net recharge by farm.

•EVAPOTRANSPIRATION_SUMMARY  SUM: The Farm process will print cell-by-cell evapotranspiration as an array

•EVAPOTRANSPIRATION_SUMMARY SEPARATE:

•ET_LIST: The Farm process will print the evaporation, transpiration, and evapotranspiration by farm.

•FARM_WELL_SUMMARY: The Farm process will print cell-by-cell evaporation and transpiration as two separate arrays

•LANDSCAPE_RUNOFF [COMPACT]: The Farm process will print the cell-by-cell surface runoff [L3/T]. An optional keyword, COMPACT, can be placed after the keyword to indicate that output should only write model cells whose runoff is greater than zero as a compact list of row, column, runoff.

•DEEP_PERCOLATION [COMPACT]: The Farm process will print the cell-by-cell deep percolation [L3/T]. An optional keyword, COMPACT, can be placed after the keyword to indicate that output should only write model cells whose deep percolation is greater than zero as a compact list of row, column, deep_percolation.

•Print Routing (ROUTING_INFORMATION): The Farm process will print routing information for all stress periods.

The MNW2 Closure criteria appear in the Options block of the Farm process input file. They are not recommended. They will only be used if MNWCLOSE is selected.

QCLOSE is the pumping criterion (L3/T).

HPCT is the head criterion (L).

RPCT is the residual criterion (L3/T).

Allow printing to listing file (inverse of NOPRINT):

Allow for aquifer storage and recovery for non-routed deliveries (WELLFIELD): Allows non-routed deliveries (NRD) to have the well field option, which simulates aquifer storage and recovery.

Calls FMP FM routine before budget calculation (RECOMP_Q_BD): Forces the FMP to re-run its land-use calculations after model time step has completed. This keyword use is not recommended.

The options in this pane are similar to options on the other panes for the Farm Process in MODFLOW OWHM version 2. This is explained in FMP: Farm Process (for MODFLOW OWHM Version 2).

Location: Location is used to specify where water balance subregions (farms) are located. Location is always required and is always specified as an array. If static, it is specified using the Farm_ID data set. If transient, it is specified as a MODFLOW Feature in an object.

Efficiency: Irrigation Efficiency (OFE) is between 0-1 and represents OFE=CIR/DEMAND, where CIR is the crop irrigation requirement under perfect efficiency and Demand is the necessary water demand to meet the CIR. Efficiency can be specified on a cell-by-cell basis by specifying it as an array. If specified as a list, the efficiency for each irrigation type for each farm is specified in the Water Balance Subregions dialog box. Irrigation types are specified in the Farm Irrigation Types dialog box.

Efficiency_Improvement: When water supply does not meet demand the EFFICIENCY (OFE) can improve to 1.0 or remain the same.

EFFICIENCY_IMPROVEMENT is a 0, 1 flag to indicate if efficiency improvement is allowed.

0 (False) - Efficiency remains the same, crop transpiration reduced due to supply shortfall

1 (True) - Efficiency improves until it reaches 1.0, then crop transpiration reduced

If not specified then it is  automatically set to False, so Efficiency is held constant based on user input. That is "EFFICIENCY_IMPROVEMENT CONSTANT 0"

If Deficit Irrigation occurs, Erriciency_Improvement allows irrigation efficiency (OFE) to improve in response to supply shortfall. Set to 0 or False to hold OFE constant and 1 or True to indicate OFE improves under deficit irrigation. If not specified, the default is 0.

Efficiency_Improvement can be specified on a cell-by-cell basis by specifying it as an array. If specified as a list, the efficiency for each irrigation type for each farm is specified in the Water Balance Subregions dialog box.

Deficiency_Scenario: DEFICIENCY_SCENARIO defines whether a water balance subregion (farm) has Deficit Irrigation or has access to external water sources to meet a supply shortfall. If not specified, then Deficit Irrigation is the default option.

0 - Irrigated Crop CU always satisfied, if shortfall, bring in external from the simulation water --External Water.

1 - Irrigated Crop CU reduced to water supply, if water supply shortfall. --Deficit Irrigation.

If not specified then it is automatically set to 1, Deficit Irrigation.

Deficiency_Scenario for each farm is specified in the Water Balance Subregions dialog box.

If a water balance subregion (farm) does not have enough supply to meet its demand, a key word specifies how the available water supply is distributed

ByDEMAND - Prorate by ratio of each crops demand by total demand (recommended)

ByAVERAGE - Prorate by crops being ABOVE or BELOW average demand flux.

BELOW is always met, ABOVE is evenly distributed. (original FMP concept)

If not specified "ByDEMAND" is used by default.

WaterSource: WATERSOURCE is used to override the availability of potential sources of irrigated water supply specified elsewhere. This can be useful for improving simulation time. For example, if a water balance subregion that does not have SUPPLY_WELLs, WATERSOURCE can be set up to indicate that there are none. If WATERSOURCE is not specified, surface water, groundwater, and non-routed deliveries will all be treated as potential sources of irrigation water. WATERSOURCE for each farm is specified in the Water Balance Subregions dialog box.

Bare_Runoff_Fraction: The amount of runoff from bare or fallow ground is expected to be different than the runoff from cultivated areas. The bare runoff fraction is the fraction of precipitation (minus any evaporation) that becomes runoff on bare or fallow ground. The bare runoff fraction can be specified either on a cell-by-cell basis or separately for each farm in the Water Balance Subregions dialog box. If specified on a cell-by-cell (array) basis, it is specified using the Bare_Runoff_Fraction data set if static or as a MODFLOW Feature in an object if transient. If not specified, the default for Bare_Runoff_Fraction is 1 indicating that all of the precipitation becomes runoff.

Bare_Precipitation_Consumption_Fraction: The Bare_Precipitation_Consumption_Fraction is the fraction of precipitation on bare or fallow ground that can evaporate. Bare_Precipitation_Consumption_Fraction is always specified in the on a cell-by-cell (array) basis. If static, it is specified using the Bare_Precipitation_Consumption_Fraction data set. If transient, it is specified as a MODFLOW Feature in an object.

Added_Demand_Runoff_Split: If a water balance subregion (farm) has specified an added irrigation demand, then Added_Demand_Runoff_Split defines the split between becoming surface runoff or deep percolation. It is the fraction of the added demand that becomes runoff. This fraction is only is a split for the additional demanded water. It does not apply to losses that originate from irrigation required to meet a land use ET which is defined in the Land_Use Block with the SURFACEWATER_LOSS_FRACTION_IRRIGATION keyword. It must be between 0.0 and 1.0; If not specified then it defaults to 0.1. The Added_Demand_Runoff_Split can be specified either on a cell-by-cell basis or separately for each farm in the Water Balance Subregions dialog box. If specified on a cell-by-cell (array) basis, it is specified using the Added_Demand_Runoff_Split data set if static or as a MODFLOW Feature in an object if transient.

Added_Crop_Demand Flux and Added_Crop_Demand Rate both specify additional crop demand but in different ways. Added_Crop_Demand Flux specifies the added demand in units of L/T whereas Added_Crop_Demand Rate specifies the added demand in units of L3/T. The final volumetric flux rate if Added_Crop_Demand Flux is specified, the volumetric flux is determined by multiplying the flux by the cell area to which it is applied. Both Added_Crop_Demand Flux and Added_Crop_Demand Rate can be applied to the same cell in which case the final added crop demand is the sum of the two. Both Added_Crop_Demand Flux and Added_Crop_Demand Rate are specified separately for each farm in the Farm Land Use Properties dialog box.