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Found 3 results

  1. I am running a transient MODFLOW scenario using the NWT solver with UPW. We are doing significant dewatering in this scenario and the water is drawn down through several layers (necessary due to geology). The MODPATh model will run for a while and then crash due to "cell thickness is negative in" some cell. I believe particles are entering cells where the CHD and NWT have the water table below the bottom of the cell which is causing MODPATH to crash. Is there any way to fix this? I already have MOODFLOW outputting head at the end of every timestep and the IPHDRY set to a positive number.
  2. Hi all, I am not a constant user of GMS so I am often re-learning data processing techniques. I am looking for help with a procedure to accomplish the following objective. I have a 10 layer, steady state flow model of a coastal plain. The top layer predominantly represents a confining clay layer (material 1 in brown) with several small discontinuous regions where the underlying aquifer is exposed (material 2 in green) and some inactive regions (in red). Regions where the underlying aquifer are exposed have specified values for recharge (using polygon feature objects derived from sh
  3. I set up a SEAWAT model for my model to account salt intrusion. My model is quite similar to the Aquaveo tutorial except I did not have an initial concentration and head values like in the tutorial. I used my steady state modflow heads as the initial heads and made up salt concentrations along coastline. However, my model runs very quickly and does not produce heads or concentrations and provides following message. Only difference in my model vs tutorial one is technically my model run in Modflow-NWT. Is this a problem? Would you please let me know? In addition my model has concent
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