Thanks for the constructive criticism. I put my camera in shutter priority mode to try to use the slowest shutter available but there was too much light to be able to slow down the shutter anymore. Any tips on how to get around this in the future?
I am not very familiar with Nikon cameras but I can tell you what I would do. I would personally shoot it in full manual mode if you camera supports it. You kind have to do a bit of guess work with the setting but as you do photography more you will get it down. I will be the first to admit I hardly use the advanced modes (lol). Also make sure you use a tripod (or something to the effect of) when trying to obtain this effect. Also take in account to how fast the water is flowing and such because it will help determine your exposure time.
That's all I got for now. I'm not a big nature landscape photographer so I can't tell you too much. I am more an animal photographer hence the critique on your cat.