> For the complete documentation index, see [llms.txt](https://hydrosense.gitbook.io/ildas/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hydrosense.gitbook.io/ildas/technical/landmodels.md). # Land Surface Models ILDAS can run multiple land surface models as standalone or ensemble mode. ## Noah MP: Noah-MP is an extension of the earlier Noah model, which incorporates new and improved land surface physics such as: 1. A multi-layer snowpack compared to one bulk-layer snowpack. 2. The tiling scheme in the grid can differentiate between vegetation and bare soil. 3. Canopy layer. 4. Permeable and non-permeable frozen soil fraction distinction. 5. The runoff scheme is based on TOPMODEL along with the Simple Groundwater Model. Furthermore, the Noah-MP offers multi-parameterization choices for various physical processes, including groundwater, dynamic vegetation, canopy stomatal resistance, runoff generation, etc. ## Catchment LSM (CLSM): 1. CLSM was developed by the NASA Global Modeling and Assimilation Office (GMAO) and is the land-surface component of the Goddard Earth Observing System Model, Version 5 (GEOS-5) General Circulation Model. 2. It divides the study area into irregular catchments based on topography, as irregular division provides a better representation of horizontal heterogeneity of terrain properties compared to uniform grids. 3. It has a distinct representation of groundwater. Each irregular division contains a saturated fraction, a sub-saturated fraction, and a wilting fraction, which are used to determine water fluxes and soil states within the catchment.
ModelVersion
Land Information System (LIS)​7.4​
Land Surface Model: Noah Multi Parameterization (Noah-MP)​3.6 & 4.0.1​
Catchment Land Surface Model (CLSM) Fortuna 2.5​2.5​
HyMAP Router​2.0​