Rampgill Level · AditNow Community

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PeteJ
50.2% (Neutral)
Newbie Topic Starter

7 years ago

Any suggestions for what may have caused the spike in zinc content?

🔗116133[linkphoto]116133[/linkphoto][/link]

Pete Jackson
Frosterley
01388527532

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caver1
50.2% (Neutral)
Newbie

7 years ago

The graph shows zinc in solution at 3 locations over time. I suspect the late spring / early summer spike would be due to low water levels / drought conditions. What water there was spent longer in contact with the ore minerals before running past the test stations. In normal, wetter, conditions the water has less time to dissolve metals, has less carbonic acid content from soils and CO2 solution, and is more diluted.

Do you have a rainfall graph, or a flow graph, for the same location(s)?

My guess for now until something better comes along... 😉

christwigg
50.2% (Neutral)
Newbie

7 years ago

Probably needs to be some sort of calculation of the flow/volume coming out to understand if the spike is significant.

Could be exactly the same total amount, just with less dilution due to the drought.

gNick
50.2% (Neutral)
Newbie

7 years ago

I wonder how this might be affected by people stirring up the sediments, particularly the deep water sections in Hangingshaw?

If the zinc sampling is a single sample every few months, the spikes may just represent a single event that has little bearing on the contamination as a whole.

Without the flow rates the graph has even less meaning.

If the spikes represent high concentration due to a low water flow you might expect corresponding inverted spikes due to high water flow which seem not to be present.

Don't look so embarrassed, it's a family trait...

sparty_lea
50.2% (Neutral)
Newbie

7 years ago

Samples only seem to be taken every couple of months so not really enough information there to say if its a one off event like bunch of explorers digging up some silt or something giving a more persistant change like drought or changed water flows in the mine.

There are 10 types of people in the world.

Those that understand binary and those that do not!

PeteJ
50.2% (Neutral)
Newbie Topic Starter

7 years ago

Thanks for your thoughts. The question was posed by the EA team.
I will ask them for comparable data about water flow.

Rainfall after November 2017 appeared to be well below the average and still appears to be low.

I also heard a report in the spring of 2018 that the water in Rampgill Level had been discoloured for several days - whitish-grey was the description. Nobody has reported a roof fall or a washout of a weir. Any comments? - can be sent to me via PM if thought to be sensitive.....

Pete Jackson
Frosterley
01388527532

royfellows
50.2% (Neutral)
Newbie

7 years ago

Water levels are good news as I will be up later in the month and want to do my fish trip now its possible again. I fully expect some 'fun' in the shale level though.

My avatar is a poor likeness.

PeteJ
50.2% (Neutral)
Newbie Topic Starter

7 years ago

Caplecleugh level is always wet!

Pete Jackson
Frosterley
01388527532