Might try this.....google it

.What is a hydraulic ram pump?
According to a North Carolina Cooperative Extension Service report, a hydraulic ram pump “is a simple, motorless device for pumping water at low flow rates.

What is a hydraulic ram pump?

It uses the energy of flowing water to lift water from a stream, pond, or spring to an elevated storage tank or to a discharge point. It is suitable for use where small quantities of water are required and power supplies are limited, such as for household, garden, or livestock water supply.