Input Instructions
Input for RES1 is read from the file that has file type "RES" in the name file.
FOR EACH SIMULATION

Data Set 1

NRES IRESCB NRESOP IRESPT NPTS
Format: I10 I10 I10 I10 I10
NRES is the number of reservoirs to be simulated. The minimum number of reservoirs that can be simulated is one and the maximum number is the number of active cells in the model grid.

IRESCB is a flag and unit number.
•If IRESCB > 0, it is the unit number on which cellbycell flow terms will be recorded whenever ICBCFL is set or "Save Budget" is specified in Output Control (see McDonald and Harbaugh, 1988, chap. 4, p. 14–15).
•If IRESCB ≤ 0, cellbycell flow terms will not be recorded. 
NRESOP is a flag to determine the layer to which reservoirs are connected.
•If NRESOP = 1 all reservoirs are connected to layer 1.
•If NRESOP = 2 all reservoirs are connected to layer specified in array IRESL.
•If NRESOP = 3 all reservoirs are connected to the highest active cell in the vertical column of cells at each reservoir location. 
IRESPT is a flag.
•If IRESPT > 0 reservoir stage, area, and volume will be printed each time step.
•If IRESPT ≤ 0 reservoir stage, area, and volume will not be printed each time step. 
NPTS is the number of values in printed table of stage, volume, and area for each reservoir. First and last stage value are minimum and maximum elevations within area of potential inundation. A value of 15 or greater is recommended for detailed representation of stagevolume and stagearea relations.



Data Set 2

IRES(NCOL,NROW)
Module: U2DINT
IRES is an array that specifies the model cells that are included in each reservoir. Array values of “0" or less indicate the absence of reservoirs at corresponding cell locations. Values greater than “0” indicate that the cell is part of the corresponding reservoir. For example, values of “1” indicate the location of the first of NRES reservoirs and values of “2" indicate the location of the second of NRES reservoirs.


Data Set 3

IRESL(NCOL,NROW)
Module: U2DINT
IF NRESOP DOES NOT EQUAL 2, SKIP DATA ITEM 3
IRESL is an array that specifies the model layer to which each reservoir cell is connected.


Data Set 4

BRES(NCOL,NROW)
Module: U2DREL
BRES is an array that specifies landsurface elevation for all reservoirs. Values in the array are assigned to the reservoir denoted by the corresponding element in the IRES array. Values are not used for cells where the corresponding element in the IRES array is less than or equal to zero.


Data Set 5

HCres(NCOL,NROW)
Module: U2DREL
HCres is an array that specifies vertical hydraulic conductivity of the reservoir bed for all reservoirs. Values in the array are assigned to the reservoir denoted by the corresponding element in the IRES array. Values are not used for cells where the corresponding element in the IRES array is less than or equal to zero.


Data Set 6

Rbthck(NCOL,NROW)
Module: U2DREL
Rbthck is an array that specifies thickness of reservoirbed sediments for all reservoirs. Values in the array are assigned to the reservoir denoted by the corresponding element in the IRES array. Values are not used for cells where the corresponding element in the IRES array is less than or equal to zero.


FOR EACH STRESS PERIOD
FOR EACH OF NRES RESERVOIRS

Data Set 7

Ststage Endstage
Format: F10.0 F10.0
Ststage is the value of reservoir stage at the start of the stress period. Because the package assigns stage values on the basis of linear interpolation to the end of each time step, the assigned reservoir stage will never equal Ststage unless Ststage and Endstage are equal. A total of NRES records with values of Ststage and Endstage are read at the start of each stress period. Stage is measured relative to the same datum used for the groundwater heads.

Endstage is the value of reservoir stage at the end of the stress period. Endstage is the value that will be assigned as stage for the corresponding reservoir for the last time step in the stress period. Stage is measured relative to the same datum used for the groundwater heads.


