_Main image above is by Suzanne McDaniel, and was taken at Island End River in Chelsea, MA, part of the Mystic River watershed. Suzanne's photo was one of the winners of the [MyRWA photo contest](http://mysticriver.org/photo-contest/)._ ## The Open Water Project The Open Water Project aims to - develop and curate open hardware and open software useful for water-related applications - build and facilitate data infrastructures that allow for easier sharing of water data - encourage the growth of communities focused on 'free and open' approaches to water science - support ongoing work by grassroots communities interested in their own local water quality issues To this end, we've been focusing on several initiatives, in particular: **The RIFFLE: An Open Source Datalogger.** We are working to develop an open source hardware datalogger that can be placed in the field for extended deployments and measure common water parameters like: - temperature - conductivity - depth - turbidity The main Public lab wiki for this device is [here](http://publiclab.org/wiki/riffle). For recent research and descriptions of projects, you can search for 'riffle' on Public Lab, via [this link](http://publiclab.org/search/riffle). **The Coqui: using audio as a sensor data format.** We're also exploring using audio frequencies to convey sensor readings -- like a modem, but even simpler -- in order to make sensor readings more accessible for people (or to enable data transmission over ubiquitous audio jacks on PCs and smartphones). Read more about this idea on the [Coqui wiki](http://publiclab.org/wiki/coqui), or look for recent updates on Public Lab [here](http://publiclab.org/search/coqui). **A mailing list.** Sign up for the [plots-water-quality email list](https://groups.google.com/forum/#!forum/plots-waterquality), and participate in discussions about low-cost, open source water quality monitoring tools and techniques. [](https://i.publiclab.org/system/images/photos/000/012/225/original/riffleStraightUp.png) [](https://i.publiclab.org/system/images/photos/000/012/226/original/Riffle-ito.png) [](//i.publiclab.org/system/images/photos/000/014/362/original/riffleLabel2.png) ##Fracking and Water Quality + Runoff There are also unique water issues related to frac sand. To get some background information and to explore options for addressing water issues as they relate to frac sand mining in your community, [head on over to the frac sand wiki page](https://publiclab.org/wiki/frac-sand). ## Community Projects We'd also like to use this wiki as a place to post links to other projects that embody an 'open science / open source' approach to hydrology and water technologies. Please add your links below! - InfoAmazonia Network: http://publiclab.org/wiki/infoamazonia-network...
| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| MadTinker | "@shanlter @rocket Thanks for the suggestion of the power bank. My biggest question, particularly related to the power bank in the link, was the vol..." | Read more » | almost 7 years ago | |||
| shanlter | "Hi @MadTinker , yes you are right, the battery I'm using is the one in your link. But you can use any kind of portable battery to charge your devic..." | Read more » | almost 7 years ago | |||
| rockets | "@MadTinker I think you can use that, but if you have a power bank, that also working. " | Read more » | almost 7 years ago | |||
| MadTinker | "@shantler I'm probably missing something, but the battery shown in the link in the components list doesn't look like the battery in the pictures ab..." | Read more » | almost 7 years ago | |||
| MadTinker | "@shantler @rockets FWIW- came home today with a mailbox literally full of 'stuff'. Also, many thanks for the loan. I have to track down my Riffle o..." | Read more » | almost 7 years ago | |||
| MadTinker | "@liz Sounds great. I think there are three parts and I'll probably ask for advice on posting as things develop: the build, the deployment, and the ..." | Read more » | almost 7 years ago | |||
| liz | "Hi @madtinker, oh there's interest! as @shanlter said, the best place to document your build is by clicking the blue button "Click here to replicat..." | Read more » | almost 7 years ago | |||
| shanlter | "@MadTinker, awesome!! I'm trying to get familiar with Public Lab's logic as well, I guess the best way to document is by replicating an activity? A..." | Read more » | almost 7 years ago | |||
| MadTinker | "@shantler @rockets et al... FWIW - I ordered the (majority) of the parts needed for a KnowFlow related system (sans the DO sensor and the enclosure..." | Read more » | almost 7 years ago | |||
| MadTinker | "@gretchengehrke Thanks! That's kinda what I thought, but wasn't sure. I'll likely end up with both since the professional measurement suite has his..." | Read more » | almost 7 years ago | |||
| gretchengehrke | "Hi @MadTinker, oxidation-reduction potential (ORP) and power of hydrogen (pH) measure different chemical properties: ORP provides information about..." | Read more » | almost 7 years ago | |||
| Sidney_AstroPlant | "Using NIR LEDs seems like a good option to look into and I'm happy to hear that I might not have to deal with extensive filtering! I just got a res..." | Read more » | almost 7 years ago | |||
| liz | "Hi @xose , @shantler did create a method page, and this now appears there as an activity! Check it out: https://publiclab.org/wiki/knowflow " | Read more » | almost 7 years ago | |||
| MadTinker | "@rockets Thanks for the summary. I thought I was going to have to move in a different direction, but this clears things up. Cheers. " | Read more » | almost 7 years ago | |||
| ramarro | "@shanlter i havent wrote anything about my project its just an hobbies for my aquarium :) @rockets I am using my project to control my reef aquar..." | Read more » | almost 7 years ago | |||
| cfastie | "A simple option might be to turn on some NIR LEDs when the photography happens. The NIR:VIS ratio might not match sunlight, but if you know what it..." | Read more » | almost 7 years ago | |||
| rockets | " DFR0504_Analog_Isolation_Module-V1.0-_Schematic.pdf here is the schematic of the isolator. " | Read more » | almost 7 years ago | |||
| shanlter | "Thanks @rockets! I hope this could help answering your questions, @ramarro. btw, The GUI of your controller looks so nice! Where can I learn more a..." | Read more » | almost 7 years ago | |||
| rockets | "I just try translate youyou's answer into english. Q:The parts for the KnowFlow-esque are going to be ordered from DFRobot and was wondering if yo..." | Read more » | almost 7 years ago | |||
| Sidney_AstroPlant | "The kit is fully enclosed with LED with a certain blue and red ratio (I have to verify what the exact ratio is). This brings me to the conclusion t..." | Read more » | almost 7 years ago | |||
| cfastie | "Thanks for adding a photo. NDVI is based on the assumption that the light illuminating the foliage has a certain proportion of NIR and VIS -- the p..." | Read more » | almost 7 years ago | |||
| cfastie | "Using two cameras solves one of the two problems I described (mixed NIR and VIS). That problem can also be solved by measuring or making assumption..." | Read more » | almost 7 years ago | |||
| Sidney_AstroPlant | "Thanks Chris for your response. My assumption was that the blue filter supplied with the RPI Noir camera blocks the red channel fully. So you get a..." | Read more » | almost 7 years ago | |||
| Sidney_AstroPlant | "Thanks for the positive messages! I see that both of you are active in open source hardware and software initiatives. We are thinking to share our ..." | Read more » | almost 7 years ago |