Shooting waterfalls is all about shutter speed. If you use a fast shutter (1/1000) you can freeze water in the air, which can be a cool effect, but using longer shutter speeds (5-30 seconds) can give you a really unique look, blurring the water as it tumbles down a cliff face or rushes around rocks. Long shutter speeds can give the feeling of movement and power, presenting different effects for different flow rates.
So, how do you get a long shutter in the middle of the day? You grab a neutral-density (ND) filter. These are really just tinted filters, not much different from the tint you have on your Cadi. these filters effectively limit the amount of light going through the lens onto the sensor. A filter, combined with a small aperture opening (f22) can allow you to get a nicelong exposure even in bright sunlight. On long exposures, it's also a good idea to use the 2 second delayed shutter to reduce even more shake. If you don't have an ND filter, try shooting at night!