This use to be a river bed and the water is natural from the ground. I
use a dehumidifier in the house and also air purifiers. I was hoping
to move the air around more and pull drier air in from outside to dry
the area. It is about 7 ft high and at times water does stand under
the house and I use a sump pump.
The fan I am considering is an exhaust fan which will move the air out
and over the soil. However even the outside soil is wet now from days
and days of rain in sunny California.