When is a Lake Not a Lake? Print
Written by Peter Burgess   
Monday, 17 September 2007

 

Kentmere Tarn is deep in the valley therefore is it a lake?
Kentmere Tarn or Lake?
When is a lake not a lake?  What makes a tarn a tarn and why did an influx of invaders confuse things with their waters and meres?  David Hall's walk (13 Sept 2007) got me thinking about Paul Rose's article on the number of lakes in the English Lake District in The Lost Sheep, Issue number 1.  How many lakes are there  in the Lake District?

 
Of course, most people announce there is only one lake in Lakeland and then inform the available audience that only Bassenthwaite is actually a named lake, the rest being meres, waters etc.  However, although I read Paul's article with enthusiasm back in the winter of 2003, even I didn't agree with his designation of sixteen lakes.  As the editor I remember writing Brothers' Water in brackets thereby making 17.  Could Devoke Water make one more?

In essence, as David suggests, one could debate for a very long time about the variables which make a tarn a tarn or a lake a lake.  Briefly and this is where a more scientific geographical definition comes in, what defines the valley lakes of Cumbria is their ecology.  Deeper water at lower altitude creates a completely different ecological system compared to shallower water with fewer tributaries at higher altitude.  The valley lakes were essentially the product of overdeepening caused by valley glaciers.  In this way Brothers' Water is a lake in that it is the remnants of a much larger valley system that would have at one time combined with Ullswater in the same way Buttermere would have formed a much larger lake with Crummock Water. Devoke Water is more akin to a high mountain tarn than say, Coniston Water.  Having said that however, its size lends itself to demonstrate characteristics more familiar in a valley lake.  David also correctly identifies the fact that Devoke Water is at a similar altitude to Hawewater which would not be ignored as being a lake.  The fisherman in David's photographs demonstrates that the water here is fit to support a healthy population of larger fish.  As David correctly suggested, tjorn comes from Old Norse for a small mountain lake.  Indeed, one could argue that the Old English waeter (water) or word for lake is perfectly in fitting for Devoke Water.  In fact, Devoke Water probably has all the attributes to make it a lake. 

Esthwaite Water
Esthwaite Water
In all honesty, having studied geography for a long time, Devoke Water is less like a tarn and probably deserves the title water.  When I first started mulling the argument over in my mind, I thought, "What makes a tarn a tarn?" and created a vision of corrie backwalls and scree ridden slopes, complete with the odd drumlin or moraine and maybe the archetypal hanging valley thrown in for good measure.  In my mind's eye the corrie lake or tarn is completely different from stretches of water such as Devoke Water.

Having said all this, I then started thinking that maybe there are more than seventeen lakes!  One sheet of water has all the characteristics of a larger lake but we all know that Burnmoor is named tarn, whilst looming under Dow Crag is Goat's Water, surely one piece of water with all the characteristics of a tarn!  From a purely scientific point of view then, the definition of a lake (water) or tarn should be somewhat easier.  I do disagree with David in that we could scientifically create a vast list of variables for identifying lakes and tarns and use them to produce an arbitary list but of course it would all be down to the characteristics used in a study.  Of course, where some expanses of water overlap in the criteria set out in a more scientific study, there would still be cause for debate.

In any case, I agree strongly with David's closing remarks.  For the majority of visitors to the Lake District the first thought isn't whether a stretch of water is a tarn or a lake but the mere fact (no pun intended) that the places visited are so beautiful. "The most pertinent thing is that we; again taking the simple approach, delight in the beauty of these wonderful places; the jewels in the crown that is the Lake District." 




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"I'd just like to say what a great weekend it has been and thanks to everyone who made it such a great time." Liz Lemal on the Honister 2007 weekend