How many feet of run for 1ft of fall? Maybe their best bet would be an undershot wheel.
Gravity votexii work with low head but I dunno about 1ft:
Quote:
Gravitation water vortex power plant - Wikipedia
https://en.wikipedia.org/wiki/Gravit...ex_power_plant
The gravitation water vortex power plant is a type of micro hydro vortex turbine system which is capable of converting energy in a moving fluid to rotational energy using a low hydraulic head of 0.7-3 metres (2 ft 4 in-9 ft 10 in). The technology is based on a round basin with a central drain. Above the drain the water forms a stable line vortex which drives a water turbine.
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So....
Use an hydraulic ram to lift the water:
https://en.wikipedia.org/wiki/Hydraulic_ram#Efficiency
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'On a side note', have you watched
Mad scientist's homestead is parking size, off-grid system?