Alan it’s grim up north you know? Av wind speed on a good day on the upland reservoirs is 15 mph. When full you’re fishing over the stone sets so any movement and the hook bait sticks due to the uneven nature of them.
An understanding of how the resers are constructed here might help. Dam end and sides have a coating of stone sets that can extend diagonally 80ft outward and depending on how deep the reser is at it’s deepest. Below this is usually what we call the “rock field.” This is made up of crushed/broken stone anything from 6 inches to well over a foot in angular size. Both the sets and the rock field are there to dissipate the wave energy and stop erosion of the central core of the dam, which is clay and earth, as the level in the reser rises and falls. Smart buggers them Victorians Engineers you now!
Slider fishing is impractical when the reser is more than 30% full, as you can’t just lift the rod to get the bait free as you can when it's fixed in the normal way. You pull the line through the float towards you and when it settles back again, it’s 3 – 4 ft near to where you are fishing from and way out of position from where you’ve been feeding. By far the most productive zone when full on the resers is 10-12 ft deep. To get around the unwieldiness of casting a 10-12 ft drop on the line from rod end to bait we use 18-20 ft Bolo rods
The only time you are fishing on a smooth bed on the resers is around late August/September when the resers is low after the summer draw off. The lowest an in- service reser by law can go down to is 15% of its total volume. When it gets to this level, generally there’s no more than 15 ft of water in it at its deepest. Of course because the volume of water is much less than when full, it doesn’t get affected by the wind as much and because you are fishing 30 –50ft below the level plane of the reservoir you can usually find somewhere that isn’t affected by the wind at all.
So there you are Alan the grimness of fishing up north. Oh to have smooth bottoms of those southern waters eh!
As to back shotting it doesn't work, as the shot hangs in either the first or second orbital and move along with it.
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Was looking for a shot on the net of an upland Reservoir when it's angry. The best I could find for now is this one, the author clearly doesn't visit many if he thinks this is windswept as that about normal for the ones I fish
A windswept Blackmoorfoot Reservoir in... (C) Sue Trescott :: Geograph Britain and Ireland