Texture2Par User Manual

Texture2Par generates 3D texture models and aquifer parameter datasets for groundwater flow modeling. Written in Fortran, Texture2Par can be used standalone or within a larger automated workflow such as groundwater model calibration. Texture2Par can be used for generating the following: + ###Texture Model Texture2Par can be used to develop Texture Models. To develop Texture Models, Texture2Par uses ordinary, block, or indicator kriging and co‑kriging to convert lithology logs, and geophysical data interpreted for texture (from AEM or geophysical logs) into 3D texture models. It supports anisotropic and isotropic variograms and cross‑variograms. + ###Aquifer Properties Texture2Par can also be used to develop Aquifer Properties for Groundwater Models. To obtain Aquifer Properties, Texture2Par uses empirical relationships between texture and aquifer properties to estimate horizontal and vertical hydraulic conductivity, specific yield, and specific storage throughout a model domain. The tool also supports a pilot‑point approach to incorporate spatially distributed aquifer parameter measurements, such as pumping test results. Aquifer Properties can directly output parameter files for IWFM and MODFLOW. The Texture2Par User Manual provides an overview of the tool inputs, outputs, setup and execution, and limitations. ###Key References: + [Texture2Par User’s Guide: A Parameterization Utility for IWFM and MODFLOW, Version 1.0.0](https://data.cnra.ca.gov/dataset/svsim/resource/88cbfa06-a2e7-4078-8f76-a1044d32fe70 "Texture2Par User’s Guide: A Parameterization Utility for IWFM and MODFLOW, Version 1.0.0) (DWR, 2022). + [Texture2Par: A texture-driven tool for estimating subsurface hydraulic properties](https://doi.org/10.1016/j.envsoft.2025.106372 "Texture2Par: A texture-driven tool for estimating subsurface hydraulic properties") (Scantlebury et al., 2025. This file contains Appendix C: Texture2Par from the [BCTools User Manual](https://data.cnra.ca.gov/dataset/dwr-basin-characterization-bctools/resource/d9d4792a-6746-4ea0-8e8b-694bdb545fc7 "BCTools User Manual"). File updated on 3/27/2026. ###Questions and comments may be directed to Basin.Characterization@water.ca.gov.