Some of the model input options have changed as a result of the new features contained in the ISC3 models. There are new options available on the CO MODELOPT card for both the Short Term and Long Term models. The source deposition parameters have changed somewhat with the new dry deposition algorithm, and there are new source parameters needed for the wet deposition algorithm in the Short Term model. Both models include a new optional pathway for specifying a terrain grid file that may be used in calculating the effects of plume depletion due to dry removal mechanisms in elevated terrain. There are also new meteorology input requirements for use of the new deposition algorithms. The option for specifying elevation units has been extended to source elevations and terrain grid elevations, in addition to receptor elevations. The CO ELEVUNIT card used to specify receptor elevations in the previous version of ISC is now obsolescent, and is being replaced by a new RE ELEVUNIT card. These new input options are described in Section 3 and summarized in Appendix B.
The utility programs, STOLDNEW, BINTOASC, and METLIST, described in Appendix C, have not been updated. While they may continue to be used as before, they are not applicable to the new deposition algorithms in the ISC3 models.
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APLICACIONES castellano: DIS CUS DES RAD english: DIS CUS DES RAD
português: DIS CUS DES RAD italiano: DIS CUS DES RAD
français: DIS CUS DES RAD