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Happy St. Patty’s Day! In the best tradition of craic, we’ll take the scenic route to talking about Ireland.

Julius Caesar was in Spain and unexpectedly needed a bridge. It was spring and he was in civil war against Pompey the Great, ally of Senate traditionalists. He was trying to outmaneuver Pompey’s armies when melting snow flooded the Sicoris River (now the Segre), trapping his troops with currents and swamps. Famine and disease set in. Caesar gave some of his men a novel command: quickly make wicker and leather boats. These were clearly not Roman ships, but Caesar’s little flotilla brought in men and supplies, they built the bridge, and drove his enemy away.

The boats Caesar’s troops made were knock-offs of the Irish currach, which he’d seen plying what today we know as the English Channel. These craft enabled trade between Ireland, Britain, and the continent. He marveled at their efficiency, describing them as being constructed “from the lightest wood.” Once again Caesar’s careful attention to detail and embrace of innovation paid off, this time in a victorious Iberian campaign.

The currach dates back perhaps thousands of years before Caesar. Contemporary currachs are generally rowers’ racing boats, longer and slenderer than their fishing boat antecedents. Their ribs are now most often made of thin plank wood and the “hides” are tarred canvas. Ireland has notably used the end of the island’s historic poverty to become a leading voice for the famine-wracked and refugee peoples of today, and more joyfully to revive its arts, language, and cultural heritage. Currach building and racing is perhaps the most prominent nautical expression of this renewed flourishing.

On this St. Patrick’s Day 2017, let’s commit to making a currach from sustainable and recycled materials by May of 2018! Sooner? It also happens that May 16 is the feast day of Brendan the Navigator, who many Irish believe crossed to America by currach long before other Europeans. HarborLAB makes ancient boats from cultures around the world. Last year we made one from bound phragmites reeds, inspired by boats made in Ethiopia and the First Nations of the Americas.

There’s practical value to this project as well. Being lightweight, a currach would be easy to raise and lower at the GreenLaunch. It would be suitable for Newtown Creek exploration because it would cause minimal water contact, and could carry research equipment. A rowboat would be excellent for students because an introduction to rowing could lead to sculling, a scholarship sport. And of course Western Queens has a large, enthusiastic Irish community! We have woodworkers and other craftspeople and artists too!

Friends to the north at Yonkers Paddling and Rowing Club made the construction of a coracle, a rounder wee cousin to the currach, their winter project.

YPRC coracle under construction. Photo by Patricia Slaven.

A line from the poem “An tlascaire” by Maidhc Sé reads, “Nothing but a smooth, tarred canvas between him and eternity. . .” Well, less forebodingly there’s nothing but a few weekends of work between us and learning adventures aboard a currach!

Water Wonk Wednesdays

Weekly water news, tips, and innovations.

by Erik Baard

Sometimes just looking at the water is enough to send you running back inland; witness the Gowanus Canal turdnami above. Snow melt from our recent storm could less dramatically force raw feces releases into our estuary through combined sewer overflows. The National Institute of Environmental Health Sciences warns that global climate change will likely increase the risk of waterborne diseases. The Inuit, who invented kayaking, are already suffering.

Dangerously contaminated waters don’t usually reveal themselves to our eyes, or even noses. Most commonly used detection and measurement methods are slow and require careful laboratory work. Imagine if you could instead scan coastal waters from orbit aboard the starship Enterprise? Already on it, as this paper describes. Or perhaps point a “Star Trek” tricorder at a water body to measure its pathogens. That prospect might too be approaching, but expect bumps and high costs along the way.

WISP wielder scans for algae and cyanobacteria. Photo by BlueLegMonitor.

The Dutch company BlueLeg Monitor has developed handheld, installed, and backpack devices to detect pigments and other suspended particulates instantly. The company also processes satellite images. The main markets are public agencies and large businesses that need fast, reliable data to close beaches or protect water resources and aquaculture. Small nonprofits like HarborLAB couldn’t afford the installed EcoWatch, for example, at 40,000 Euros ($42,930). Veritide, based in New Zealand, adds first responders and meat packers to the market list.

Researchers Mohammad Haji Gholizadeh, Assefa M. Melesse, and Lakshmi Reddi of Florida State University provide “A Comprehensive Review on Water Quality Parameters Estimation Using Remote Sensing Techniques.” They conclude that while aerial and satellite sensing of water contamination is reliable and less expensive than the in situ sampling now prevalent, “Improvement of the methodology to interpret images from simple linear regression to multivariate statistical analysis approaches like principle components analysis (PCA) and neural networks will help to make the procedures more accurate and easier to manipulate.”This is a prospect the US Geological Survey takes seriously. Irish researchers make a case for cheaper, ubiquitous sensors that can measure turbidity and color.

Danish research, published in NatureResearch’s Scientific Reports, promises to reveal fecal bacteria like e. coli  in just ten minutes by comparing microscopic photos of a water samples with a library of images. A 3D image recognition algorithm can sort species from each other and suspended particles.

Image first published in Scientific Reports, NatureResearch. 

Perhaps innovations along these lines for the mass market of grocery shoppers and healthcare might attract even more research, lowering costs across the board and speeding solutions to our waterfront.

Why is this a big deal? Determining the most probable number of fecal bacteria per unit of water is a slow process (more than 24 hours) of sampling, incubation, and testing. Enterococcus testing is the preferred method for determining swimming beach safety in the U.S., succeeding the old standard of fecal coliform testing in 2004. If a beach shows a five week mean of 35 colony-forming units or  more per 100 milliliters of water, it’s closed. The Virginia Department of Environmental Quality published a great introductory explanation of this process. Improved, faster assays are sold or in development, but most cost too much for groups like HarborLAB.

Water samples incubated and tested by Bronx River Alliance. 

Each week members of the NYC Water Trail Association, like HarborLAB, sample water for laboratories to test for fecal bacteria indicating sewer overflows. One test involves incubating bacteria cultures and then detecting the presence of enterococcus, a genus found in human intestines, by the contaminated vials’ glow when exposed to ultraviolet light. Above you see the results from a lab operated by Bronx River Alliance. HarborLAB initiated sampling in western Queens and samples the water at Gantry Plaza State Park.

You can count on our Water Quality Monitoring volunteer crew to be out there each week to keep paddling at Gantry Plaza State Park safe, and we welcome you to join us by emailing volunteer@harborlab.org with the subject line “Water quality volunteer.” But forgive us for scanning periodicals for hints of when robots might replace us!  😉