Geophysics to find land drains
- Thread starter Laggard
- Start date
Www.bartington.com
May help you.
They made instruments used on time team, I emailed them about 6 years ago to find out about this.
[email protected]
This is who I emailed. Don't know if he still works there.
Never pursued it.
May help you.
They made instruments used on time team, I emailed them about 6 years ago to find out about this.
[email protected]
This is who I emailed. Don't know if he still works there.
Never pursued it.
- Location
- East Sussex
Two pieces of bent wire works quite well.
Remember if you find one drain and they were put in during the grant periods of the 1960 - 1980's then they will be a Chain apart (22 metres).
Remember if you find one drain and they were put in during the grant periods of the 1960 - 1980's then they will be a Chain apart (22 metres).
- Location
- Cirencester
They did Geo phis on some land destined for a solar park and I didn't see one drain showing on the results but I know for a fact they were there, both plastic pipe and also very old Cotswold stone drains and also old clay pipe drains. I am not sure if they filter them out in the results or not but I was surprised.
Kingofgrass
Member
Had a field drained 2years ago,he had been on Google Earth or something I knew roughly where the drains were tho and you could see them in the picture(crop changes colour) looked pretty cool really
- Location
- Lincolnshire
None of ours were, it was what suited the soil, some at 15Yds with every 3rd one deeper with stone on top.. the idea of that one was to lower water table.
- Location
- East Sussex
Yes there probably were variables but the standard was always a chain in this area.
Our local council came out to geophyis scan a sinkhole ourside our house. It was a complete waste of time. The guy operating it swore blind it was working and was quite embarrassed when i picked up a broomhandle and showed him that the void was twice the size his machine said. 20 grand paperweight.
Red Fred
Member
- Location
- Hants/Dorset border
We do a fair bit of geophysical work with our archaeological society. The chap who is most clued up works in mapping, so has a lot of knowledge concerning processing the results into visible form.
We use 2 techniques, firstly resistivity, which measures changes in electrical resistance across the soil (this involves plonking across a 20m grid with a square frame at. 1m intervals. We built the machine ourselves using plans found in an electronic magazine.
Following successful surveys, we have recently been allowed access to a more sophisticated gradiometer which measures fluctuations in the Earth's magnetism. We have been lent the machine by the local uni. Archaeological department in a scheme for local societies. The machine is their last generation one, but is still much quicker to use than our Res machine once the grid's are laid out (we use marked out washing line )
Promising sites can be found by studying air photos such as Google Earth, our own air pics taken from the phantom or our member's ultralight flights. These can be overlayed onto 3d maps and compared to the free lidar images to be found on the net.
If you have a local archaeological society, they may be able to look in exchange for a donation or if there is anything interesting to look at nearby.
We use 2 techniques, firstly resistivity, which measures changes in electrical resistance across the soil (this involves plonking across a 20m grid with a square frame at. 1m intervals. We built the machine ourselves using plans found in an electronic magazine.
Following successful surveys, we have recently been allowed access to a more sophisticated gradiometer which measures fluctuations in the Earth's magnetism. We have been lent the machine by the local uni. Archaeological department in a scheme for local societies. The machine is their last generation one, but is still much quicker to use than our Res machine once the grid's are laid out (we use marked out washing line )
Promising sites can be found by studying air photos such as Google Earth, our own air pics taken from the phantom or our member's ultralight flights. These can be overlayed onto 3d maps and compared to the free lidar images to be found on the net.
If you have a local archaeological society, they may be able to look in exchange for a donation or if there is anything interesting to look at nearby.
Had some fencing done the other day and pegged out a phone cable for them so they didn't hit it. The guy said he wanted to try but was scared he would be electrocuted. Don't know which is more ridiculous. I know the bent rods work though and proved it to them with my eyes shut.
Red Fred
Member
- Location
- Hants/Dorset border
If anyone is interested in our geophysics work, we have a blog at https://blogavas.wordpress.com
It may need signing in to have a look.
It may need signing in to have a look.
- Location
- Kent Sussex border
We had a demo of ground penetrating radar last month to see how effective it was at finding underground utilities, including land drains.
We were that impressed that we are having a longer demo on Monday.
Not sure how small a target it can locate, that's what we want to test next week, we certainly had no problem locating drains and ducts around the farmyard.
We were that impressed that we are having a longer demo on Monday.
Not sure how small a target it can locate, that's what we want to test next week, we certainly had no problem locating drains and ducts around the farmyard.
glasshouse
Member
- Location
- lothians
Polish driver laughed at me with 2 bits of wire,
till i found the pipe he had spent the morning looking for.
DeeGee
Member
- Location
- North East Wales
I have always thought that I could find underground water with two wires, and it does work in most cases. However when asked to put my skills to use it has to be said that when the wires uncontrollably cross over there is not always water beneath where I have stood. So not entirely sure that it is foolproof?
- Location
- Lincolnshire
They will cross for many reasons, drain pipe, water pipe, electric cable etc
- Location
- Kent Sussex border
We had a demo from Zenith Survey Ltd
They have branches around the UK, I dealt with the Crawley branch.
They hire out gpr @ £250 per week.
