> 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/~/changes/GiVD5ID0WVyRIAumaMy2/introduction/aquifers/aquifer.aqu/rchg_dp.md).

# rchg\_dp

Recharge to deeper aquifers

This parameter defines the fraction of root zone percolation reaching a deeper aquifer. If a deep aquifer is defined in **aquifer.aqu** and [**aquifer.con**](/io-docs/~/changes/GiVD5ID0WVyRIAumaMy2/introduction/aquifers/aquifer.aqu.md), its groundwater flow can be routed to any other spatial object using [**aquifer.con**](/io-docs/~/changes/GiVD5ID0WVyRIAumaMy2/introduction/aquifers/aquifer.aqu.md). If no deeper aquifer is defined, the water that recharges the deeper aquifer is assumed to be lost from the watershed.