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Download GMS User Manual (v9.1)
Transcript
PEST ASP Package 383 PEST ASP Package MODFLOW Pre-processing Building a MODFLOW Model Map to MODFLOW Packages Supported in GMS Saving a MODFLOW Simulation Importing MODFLOW Files Unsupported MODFLOW Features Post-processing MODFLOW Display Options MODFLOW Post Processing Viewing Options Reading a MODFLOW Simulation Tutorials MODFLOW Tutorials Packages Flow: BCF6, HUF, LPF, UPW Solvers: DE4, GMG, NWT, PCG2, PCGN, SAMG, SIP, SOR Other: BAS6, CHD1, DRN1, DRT1, EVT1, ETS1, GAGE, GHB1, HFB1, HUF, LAK3, MNW1, MNW2, OUT1, RCH1, RIV1, SFR2, STR1, SUB1, WEL1, UZF1 Prior to version 9.0 this command and dialog were called "Convergence Options". When performing automated parameter estimation, a set of optimal parameter values can only be found if MODFLOW produces a stable solution for all iterations. One of the things that can cause problems with the inverse model is cells going dry. The dry cell flag that is written to the head array can cause instability in the inverse model, and thus it will not converge. When such problems occur, a successful run may be achieved by turning on some convergence options that have been added to the GMS version of MODFLOW by John Doherty. These options are accessed via the PEST ASP Package command in the MODFLOW menu. The options are as follows:
