the first one is 215 litres / min which is enough for most sluices of up to 10 - 12 inches width but only 8 metres of head . good flow rate but if your highbanker is 8 metres above the water level you will get close to zero water.
the second one is 40 metres head but only 60 litres / min which might run a sluice up to 6 - 7 inches width if youre at water level , again as you go higher up the flow rate will drop , if youre 40 metres above water level you will have close to zero flow , and at 20 metres above the water you might have around 30 litres /min
third one is 250 litres which can supply a 10 - 14 inch wide sluice but again it only provides pressure enough to give 8 metres head like the first one
they are all cheapish but not ideal . forum members might be able to point you at something better ?
do you already have a genset to run the pump from ?
ps . if you absolutely have your mind set on a 240 volt pump and genset option , try to find a pump with around 13,000 - 16,000 litres per hour ( 200 - 260 litres/min ) that will give you at least 30 - 40 metres of head.
price-wise thats reasonable performance if its under $ 120 , or look at petrol pumps under $ 200 as the guys mentioned above