Summit pounds therefore need an independent form of water supply , which may take the form of weirs on adjacent rivers , reservoirs or pumping stations .
Summit pounds are particularly important in canal design , as every boat entering or leaving the pound causes a loss of water .
Summit pounds need an independent form of water supply , which may take the form of weirs on adjacent rivers , reservoirs or pumping stations .
Summit pounds are particularly important in canal design , as every boat entering or leaving the pound causes a loss of water .