DSM2 Input 2026-04-16 historical update

Version "DSM2 Input 2026-04-16 historical update" is based on version "DSM2 Input 2025-09-18 historical update" (which incorporates the changes from the Monitoring Special Study version of DSM2), and includes the following changes: The CHANNEL input section in the file channel_std_delta_grid.inp has been modified to work with DSM2 v8.5.0, by including the "dx" field, which specifies a value of the parameter "delta x" separately for each channel. Previously, delta x values have been specified in a file called variable_dx.csv. This file has been removed. The location of the Middle River Barrier has been corrected by adding channel 901 to replace a portion of channel 134. The Middle River barrier has been placed on the upstream side of the node for consistency with the configurations of other barriers. Dispersion factors have been adjusted to improve EC results.