THE PILOT REPORTED THAT DURING AN APPROACH TO LAND, THE FLOATPLANE ENCOUNTERED A MICROBURST (DOWNDRAFT) AND MADE A HARD LANDING ON THE WATER. SHE ELECTED TO ABORT THE LANDING. SHE STATED THAT DURING THE ENSUING TAKEOFF RUN, WHILE STILL ON THE WATER, THE WIND FORCED THE FLOATPLANE TO THE LEFT TOWARD THE SHORELINE, DESPITE HER ATTEMPTS TO CORRECT BACK TO THE RIGHT. SUBSEQUENTLY, THE AIRCRAFT CONTACTED ROCKS NEAR THE SHORELINE AND NOSED OVER.