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Hi, I have recently started using the UZF package to simulated groudwater flow in a regional model. I firstly developed a steady state model using spatially distributed recharge from a surface model. I was using the «recharge» and the «EVT» package. With this configuration i was able to obtain a water budget with % error < 0.001%. When i replaced the recharge and EVT packages by the UZF, the water budget output file shows a line with a component called «HORT+DUNN» which i suspect to be the surface runoff flow. This component is not well describe in the USGS MODFLOW documentation. The problem is that this volume of water is only present in the «IN» part. In then creates a poor water balance ~1% to 5% error. If i remove it from the balance, the % error is good (> 0.01%). Any idea of how to deal with this water budget component? Regards
I am working on a site that has transient/perched water above the saturated zone. Is this possible in MODFLOW? I have read about the UZF package, but am unfamiliar with it. Any guidance/ideas/thoughts would be appreciated. Thanks in advance!!