Wow , i should definitely consider using that watershed area. What angle is ideal for that Tums? I mean i guess having sediment in your pond is not a desirable thing. Is it? How to control that?
And i have 1 doubt in my mind: The soil of my city drains water perfectly. And i think maybe the water that falls on the ground will be sucked by the water and not be conveyed to my lake. What do you think?