Documentation for the Skeletal Storage, Compaction, and Subsidence (CSUB) Package of MODFLOW 6

This report describes the skeletal storage, compaction, and subsidence (CSUB) Package of the Groundwater Flow Model for the U.S. Geological Survey (USGS) modular hydrologic simulation program, called MODFLOW 6. The MODFLOW 6 program can be be downloaded from the USGS for free. The performance of the CSUB package has been tested in a variety of applications. Future applications, however, might reveal errors that were not detected in the test simulations. Users are requested to send notifcation of any errors found in this model documentation report or in the model program to the MODFLOW contact listed on the Web page.