> For the complete documentation index, see [llms.txt](https://swatplus.gitbook.io/io-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://swatplus.gitbook.io/io-docs/theoretical-documentation/section-2-hydrology/chapter-2-2-evapotranspiration/2-2.3-actual-evapotranspiration/2-2.3.3-sublimation-and-evaporation-from-the-soil/2-2.3.3.1-sublimation.md).

# 2:2.3.3.1 Sublimation

Once the maximum amount of sublimation/soil evaporation for the day is calculated, SWAT+ will first remove water from the snow pack to meet the evaporative demand. If the water content of the snow pack is greater than the maximum sublimation/soil evaporation demand, then

$$E\_{sub}=E'\_s$$                                                                                                                                                              2:2.3.10

$$SNO\_{(f)}=SNO\_{(i)}-E'\_s$$                                                                                                                                 2:2.3.11

$$E''\_s=0.$$                                                                                                                                                                  2:2.3.12

where $$E\_{sub}$$ is the amount of sublimation on a given day (mm H$$\_2$$O), $$E'\_s$$ is the maximum sublimation/soil evaporation adjusted for plant water use on a given day (mm H$$*2$$O), $$SNO*{(i)}$$ is the amount of water in the snow pack on a given day prior to accounting for sublimation (mm H$$*2$$O), $$SNO*{(f)}$$ is the amount of water in the snow pack on a given day after accounting for sublimation (mm H$$\_2$$O), and $$E''\_s$$ is the maximum soil water evaporation on a given day (mm H$$\_2$$O). If the water content of the snow pack is less than the maximum sublimation/soil evaporation demand, then

$$E\_{sub}=SNO\_{(i)}$$                                                                                                                                                    2:2.3.13

$$SNO\_{(f)}=0.$$                                                                                                                                                        2:2.3.14

$$E''\_s=E'*s-E*{sub}$$                                                                                                                                                  2:2.3.15