Worrying situation at Redmire

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Snape
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Worrying situation at Redmire

Post by Snape » Sun Oct 15, 2017 1:53 pm

Ten days ago the fishing party at Redmire spotted fish on the surface gasping. An EA officer was called in and a decision was taken for the anglers to leave the pool. It appears that the agricultural pollution is creating a dire situation.
When the dissolved oxygen levels were checked they were less than a quarter of what they should be at this time year. A week later they were re checked and had dropped further and were about an eighth of what they should be. This is a very serious situation and the lives of the fish are a extreme risk.
Les is looking at getting specialist aeration equipment brought in.
Sad times indeed. ☹️
Many men go fishing all of their lives without knowing it is not fish they are after.
~Henry David Thoreau

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Olly
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Re: Worrying situation at Redmire

Post by Olly » Sun Oct 15, 2017 1:57 pm

Hiring a pump to suck out the lake water --- and then spray it back in again works if necessary.

Had to use this in emergencies in the past.

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Tengisgol
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Re: Worrying situation at Redmire

Post by Tengisgol » Sun Oct 15, 2017 2:15 pm

Sign of the times I am afraid.
Where the willows meet the water...

https://sites.google.com/site/tengisgol/

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Bjp
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Re: Worrying situation at Redmire

Post by Bjp » Sun Oct 15, 2017 2:51 pm

the small pond near my home has just been closed this weekend for exactly the same reason

regards

bjp :Hat:

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Santiago
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Re: Worrying situation at Redmire

Post by Santiago » Sun Oct 15, 2017 5:26 pm

What type of agricultural pollution do they think is responsible? Sounds like slurry is getting in, but I would have thought there would have been preventative measures taken by the estate to stop this happening. Otherwise, aeration will help short term, but they're probably need to do some remedial dredging to remove lots of silt, and throw in a few hay bails in to promote healthy microbe activity. Having never been to Redmire, it's hard for me to guess at the exact cause, but this time of year lots of leaves falling in shallow water can reduce oxygen levels by decomposition, especially in warmer spells and with less oxygenation by water plants.
Last edited by Santiago on Sun Oct 15, 2017 5:31 pm, edited 1 time in total.
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Firebird
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Re: Worrying situation at Redmire

Post by Firebird » Sun Oct 15, 2017 5:28 pm

Is the agricultural pollution caused by the same people who let out the fishing?

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Snape
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Re: Worrying situation at Redmire

Post by Snape » Sun Oct 15, 2017 6:38 pm

Santiago wrote:
Sun Oct 15, 2017 5:26 pm
What type of agricultural pollution do they think is responsible? Sounds like slurry is getting in, but I would have thought there would have been preventative measures taken by the estate to stop this happening. Otherwise, aeration will help short term, but they're probably need to do some remedial dredging to remove lots of silt, and throw in a few hay bails in to promote healthy microbe activity. Having never been to Redmire, it's hard for me to guess at the exact cause, but this time of year lots of leaves falling in shallow water can reduce oxygen levels by decomposition, especially in warmer spells and with less oxygenation by water plants.
The pollution is run off from neighbouring fields which are used for growing potatoes.
Lots of silt and probably nitrate fertiliser has been allowed to enter the pool and there was a lot of silk weed this summer which has now stopped growing and sunk and created anoxic conditions.
Skeff is on to it and there is a plan in place involving putting in swale/reed bed to slow in ingress of water and remove excessive nutrients but at the moment there are field drains running pretty much straight to the inlet stream.
The major concern is for the welfare of the fish which are serious suffering right now and is the dissolved oxygen drops more they will die.
Many men go fishing all of their lives without knowing it is not fish they are after.
~Henry David Thoreau

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Snape
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Re: Worrying situation at Redmire

Post by Snape » Sun Oct 15, 2017 6:41 pm

Firebird wrote:
Sun Oct 15, 2017 5:28 pm
Is the agricultural pollution caused by the same people who let out the fishing?
It is on the same estate but the land is farmed by others.
Many men go fishing all of their lives without knowing it is not fish they are after.
~Henry David Thoreau

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Mario
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Re: Worrying situation at Redmire

Post by Mario » Sun Oct 15, 2017 8:11 pm

we have installed eareaters which come on every night in our pool as we had oxegen problems about ten years ago which killed a lot of fish and it happened twice after very hot weather we also put in siltex to eat away at the silt we did three times over three years we haven't had this problem since so it seems to have worked

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JPC
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Re: Worrying situation at Redmire

Post by JPC » Wed Oct 18, 2017 7:07 pm

I'm not sure the current problem is down to the potato slurry, although it doesn't help matters. At the end of June the Pool was quite weedy and although fairly coloured the fish could still be seen. When we fished there in early August the weed was non-existent when I spoke to Les he said the weed had disappeared virtually overnight and he was concerned that the resident farmer had been treating some of the fields and crops further up the estate. The following day the shallows had changed from a murky brown to a very dark green, the next day the Pool up to the Evening Pitch was dark green and we could no longer see the fish. On our last day the whole Pool was bottle green and looking very strange. I know from past experience the farm manager who also owns some of the land on the estate has little time or concern for the Pool " its only good for a duck shot" he once told me and I have no doubt if he felt the need to "fertilise " his land regardless of the possible consequences to the Pool he would.
I did speak to Mark last Friday at Ashmead and he did seem very concerned, the disolved oxygen content being extremely low, the EA were involved and pumps were being arranged, hopefully thing will improve ???

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