Dear Listers, Your response to my seeking advice on deploying water level loggers was overwhelming – thanks a lot, you’ve helped me a great deal along the way. It’s great to gain insight in different techniques in a wide range of aquatic ecosystems and environmental conditions. I’m also grateful to have received great advice on issues I hadn’t brought my mind around yet (or didn’t even reckon it might actually be an issue!). We are right now developing a logger deploying system based on your feedback that will hopefully meet our requirements. We are considering a double rebar driven-into-substrate system, with the logger suspended in a PVC tube attached to both of the rebars. I’ll keep you updated on our success (or epic fail), if you are interested.
Most of your reports on deploying loggers in riverine systems mention a set-up similar to the one we are going to use during our first test run. Others mention a range of methods attaching or cementing loggers to structures. Since I received most of your precious advice off-list, I am happy to provide a summary. Please contact me off-list, and I’ll be happy to send it through. Best regards, Claudia Claudia Pogoreutz, M.Sc. PhD student Senckenberg Research Institute Department of River Ecology and Conservation Clamecystraße 12 63571 Gelnhausen Ph: +49-0170-3602210 Email: [email protected] On Wed, Jun 26, 2013 at 6:12 PM, Claudia Pogoreutz <[email protected]>wrote: > Dear Listers, > > > > As a part of my PhD project, I am going to deploy a number of water level > and temperature loggers (probably type HOBO U20) at different sites of a > small river and its floodplain. The system is governed by strong summer and > winter inundations, the low-water line is around 0.7 m, strong winter > inundations can reach as high as 5 m. I am particularly concerned about > loads of tree trunks and timber, which can damage, destroy or detach > loggers (and quickly deplete my limited budget). > > I was wondering if anyone of you has experience with the securely > deploying submersible data loggers in comparably dynamic riverine systems. > I am considering an approach in which the logger is attached to an erected > metal pole, which is rammed deeply into the river bed (e.g., 50 – 80 cm > deep). The logger would be attached to the pole downstream (e.g., with > cable, cable ties, or similar, and a back-up system, if possible). Do you > think this approach is feasible, or did you successfully apply different > set-ups? > > > > I highly appreciate your advice. > > > > Thanks a lot in advance. > > > > Best wishes, > > Claudia > > > Claudia Pogoreutz, M.Sc. > > PhD student > > > > Senckenberg Research Institute > > Department of River Ecology and Conservation > > Clamecystraße 12 > > 63571 Gelnhausen > > > > Ph: +49-0170-3602210 > > Email: [email protected] >
