GWlink

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Calibrate the Freyberg groundwater model with the real PEST++ 5.2.27, compiled to WebAssembly. PEST++ schedules MODFLOW 6 workers on this device and prints its output here as it runs.

PEST++ 5.2.27 / browser worker Local

Loading the model and the modules…

No server · Web Workers
Iteration— Forward runs0 / — Active0 / — Phi— Elapsed00:00.0
pest++ terminal · unmodified program output 0 lines 

                


                

                  

                  

                    

                      

                        
Objective function

                        
Phi per iteration, log scale

                      

                      Waiting
                    

                    
                  


                  

                    

                      

                        
Multiplier recovery

                        
Dashed rules mark the hidden truth

                      

                    

                    
                  


                  
                

              


              
            

          

        

        

          Gate of record, 2026-08-11. WASM pestpp-ies recovered [2.9655, 1, 0.3005] where native recovered
          [2.9568, 1, 0.3005], a largest parameter difference of 0.295%. Reproduce with npm run test:parity in
          gwlabdev/pestpp-wasm.
        

      


      

        
A port, not a rewrite.

        

          No calibration code was written for this page. PEST++ is compiled from the pinned 5.2.27 sources with
          numbered patches and one added run manager, and a result only counts when it matches the native suite.
        

        

          RunManagerAbstract::run()The seam. One pure virtual method behind which the algorithms never learn who executes the model.
          docs/host-contract.mdThe boundary. Consumers provide one async function from parameters to observations, and the GPL stays behind it.
          npm run test:parityThe gate. Hidden multipliers recovered within 0.5% of native PEST++ before anything ships.