The unsaturated groundwater zone used to always start empty. With this new attribute (groundwater wizard tab) you can also set an initial saturation, for example 60%. This means that if your groundwater is 1m deep, with a storage percentage of 50%, there is 1*0.5*0.6 = 0.3m water spread over 1m unsaturated zone.
![](https://www.tygron.com/wp-content/uploads/2024/08/Hackaton_feature-300x114.jpg)