Since you are so far beyond the normal 33 meter range of wifi this means you are a gambler or a wisher. I can't tell which.
However you could craft something the jumps the canal but reliability is another issue. It won't be reliable so I decline to tell you much more than this.
Here in the US we get a broadband card for such locations.
Guys, I am desperate for your advice. here is my situation.
I don't have any kind of internet facility where i live (a remote village in pakistan) I need to travel around 10Km to use the nearest internet facility. I have been able to locate a DSL connection around 500 meters from my home. But i cant physically route it to where I live (there is a small canal in between).
So i was thinking If i can use the wifi network, use two D-link DWL-2100AP access points one at the source and an other at my place, both placed outdoors (i think line of sight is clear)
One more thing, the only wifi equipment that I can purchase is from this site : http://www.beliscity.com/networking_wireless_networking/c10_1621/index.html?osCsid=c92f1fc3f1e32ccd850db734dc519fc2
Please help this poor fellow, who has been denied the necessities of a modern life.!