Water Pump that pumps from river when it detects low water in storage tank

[RuralDonegal]

Hello All,

Im trying to figure out how best to get water supply from a river which is close to my property.
Im currently looking into a gravity fed system. But was wondering if anyone could tell me what kind of pump would i need that could automatically pump the water when it detects the water has dropped in the icb 1000l storage tank. Is there a type of pump that activates on its own to keep the tanks full? many thanks for any advice

 

[rpm]

Best way is through a control panel to turn pump on & off with float valves in the ICB.