“Outdoor point-to-point arrangements, through use of directional antennas, can be extended with many kilometers between stations. ” (Desde Wikipedia, http://en.wikipedia.org/wiki/Long-range_Wi-Fi

-How it affects it all depends where the water is, and also depends on the frequency e.g.

TOMADO DESDE EL BLOG (https://learningnetwork.cisco.com/thread/7868), 29/1/15

Rain

A Microwave link of 38 Ghz frequency point to point is affected far more than a frequency of 2.4 Ghz, 7 Ghz point to point etc because the wavelength is

very short on 38 Ghz. The higher the number the more it is affected by water/rain I.E. the data in the airwaves get hit/damaged which will eventually cause links to drop out.

Note: I am trying to be basic here so it is easy to understand because i don’t know your knowledge on Microwave.

All countries have a design/number to work to depending on what part of the world they live in, England has 2 numbers. These numbers just represent what the rain rate is and you design the network to that I.E. a fade margin is designed in. That link however can only take so much rain and if the rain comes

down heavier than the normal that link will drop out. You could design it better but that costs money.

Large Ponds/Lakes, the Sea

Think of these as a mirror which reflect, and that is just what a frequency will do when it hits large amounts of water like the above. If the signals reach the receiver 180 degrees out of sync then the whole thing is cancelled out and your link goes up and down.

As the signal hits the water it reflects off (answering your question) in unpredictable directions. Apart from destroying your link this will also reflect in all directions and into other radio waves of the same frequency causing more destruction to your network.