_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. [![riffleStraightUp.png](https://i.publiclab.org/system/images/photos/000/012/225/medium/riffleStraightUp.png)](https://i.publiclab.org/system/images/photos/000/012/225/original/riffleStraightUp.png) [![Riffle-ito.png](https://i.publiclab.org/system/images/photos/000/012/226/medium/Riffle-ito.png)](https://i.publiclab.org/system/images/photos/000/012/226/original/Riffle-ito.png) [![riffleLabel2.png](//i.publiclab.org/system/images/photos/000/014/362/medium/riffleLabel2.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 | ||
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xose | "@bronwen, @liz, am I wrong or this could be considered as "method"? It's own particularities made the KnowFlow a different one than Coqui, Riffle o..." | Read more » | over 7 years ago | |||
Bronwen | "@Bronwen awards a barnstar to shanlter for their awesome contribution! " | Read more » | over 7 years ago | |||
Bronwen | "Absolutely, @liz ! This is a really exciting (and well documented!) research note. Thanks for sharing, @shanlter ! " | Read more » | over 7 years ago | |||
liz | "Thank you for these well-written and elegantly photographed instructions! I found this note very inviting and i can't wait to order the parts and m..." | Read more » | over 7 years ago | |||
xose | "So cool!! " | Read more » | over 7 years ago | |||
Paquicamus | "Hi shanlter, I was wondering after looking your results if you have done conductivity ? Your published Total Dissolved Solids were measured by a p..." | Read more » | over 7 years ago | |||
NCartmell | "I've built one of your fine Coqui circuits. It works very well with the LDR (photo resistor). Is there a recommended distance between the metal pro..." | Read more » | almost 8 years ago | |||
NCartmell | "I can help with probe material: Regarding Stainless Steel, general purpose grade is 304 and marine grade is 316. Stainless steel, particularly 304 ..." | Read more » | almost 8 years ago | |||
liz | "Hi Dave, This is a very interesting project. How is the Facebook group working for you so far? Based on the name of your Facebook group, I added t..." | Read more » | about 8 years ago | |||
xose | "Facebook account needed to check the project... " | Read more » | about 8 years ago | |||
liz | "I agree @Ekta64 this is a difficult call " | Read more » | about 8 years ago | |||
ecta64 | "I'm having a hard time figuring out to approve this or not. While there might be a reason to publish info on trying to make a drone to kill lionfis..." | Read more » | about 8 years ago | |||
rockets | "@rockets awards a barnstar to shanlter for their awesome contribution! " | Read more » | about 8 years ago | |||
lim0731 | "May I know what model number of servo motor that u used in the design? " | Read more » | about 8 years ago | |||
donblair | "Hallo! I haven't had great luck with Digikey shopping carts sticking around, so it might be better to put direct links to parts in e.g. a wiki ......" | Read more » | over 8 years ago | |||
kanarinka | "I'm actually not sure about this - @donblair - do you know the answer? " | Read more » | over 8 years ago | |||
shanlter | "You are right! @Siphirobe! This "Swimming across pearl river"activity keeps going now, and this July, they did this again, and said the water quali..." | Read more » | over 8 years ago | |||
Siphirobe | "This is a great idea for a project! I lived in Guangzhou near the river for around one year a while ago. There used to be an event once a year wher..." | Read more » | over 8 years ago | |||
shanlter | "Yes! @liz " | Read more » | over 8 years ago | |||
liz | "It is also good to see a nice picture of Lion in action! " | Read more » | over 8 years ago | |||
liz | "Dear @Shanlter -- this is great! I clicked through to your documents, seems like GreenovationHub is also part of this effort -- shall i tag them in..." | Read more » | over 8 years ago | |||
pdhixenbaugh | "I'm intrigued by the speaker resistance - can that be measured with a multimeter - and what are the rules of thumb for not burning out the timer? " | Read more » | over 8 years ago | |||
kanarinka | "Thanks @warren! @kgradow1 - this is a great suggestion for improvement as I've also had that happen. How about @akshaya and I will make a digikey s..." | Read more » | over 8 years ago | |||
kgradow1 | "This is a great overview! One suggested edit: Include an explanation of how component variability might impact the circuit. I've tried to build th..." | Read more » | over 8 years ago |