the gameplay is so complex i don't understand how to dry out the lake that bothers me. is it possible? give me a hint? which tab?
Firstly it should really be a lake; meaning standing water not river with flowing water (check it with your mouse over). Secondly, you need to reseach and build some moisture pumps nearby. They require electrical power and some time to slowly turn mud into soil and shallow water into gravel (if I recall correctly). They also should drain bogs and swamps but I have never got to try this ones somehow.
thanks for explaining
Well, there is always another solution depending on your needs. If you want some building/walking space you allway can build bridges over all the water and mush. And over bridges you can place walls and light furniture for living quarters.