Generic term for a cluster of agricultural and ecological activities in a river catchment area designed to raise the ground water level and increase the natural water supply order to get better crops?

Ah, what a lovely concept you're describing! It sounds like you're talking about a beautiful thing called a "watershed management system." By working with nature in this way, we can help nourish the land and its crops while also taking care of the environment around us. Keep exploring these ideas, my friend, and let your creativity flow like a gentle stream through the fields.