Is Pokémon Go going to Revolutionize the Energy Industry?

Swamp Stomp

Volume 16, Issue 35

Pokémon Go may be more than just the last craze that everyone is obsessing over.  The technology behind the popular app may move environmental research forward as well as impact the energy sector according to everyone from national labs to universities.  The app also can be used to improve the environment and teach people who play the game about the environment.

An example of people trying to use the craze to positively impact the environment is the University of Minnesota, Duluth.  They are trying to get students to reduce water pollution and clear storm drains while walking around trying to catch Pokémon. “While you are out catching Pokémon, why not help us catch illicit discharges?” the college posted on its website.

“Oak Ridge National Laboratory, meanwhile, is outlining in a video this month how researchers are using the same geographic information system (GIS) as in the game to assess things like energy and water demand” (Marshall).  Another way to spread the word about the impact the apps technology is through blogging, like the Energy Power Research Institute (EPRI).  EPRI is writing about how they are testing similar technologies with multiple utilities in the hopes to improve the electricity system by improving efficiency by double digits.

NextGen Climate, the group backed by billionaire environmental activist Tom Steyer, is attempting to drum up more supporters by setting up solar power charging stations at hotspots in order to discuss their group while people charge their phones.  “We’re showing young people that registering to vote is easier than catching the elusive Pikachu,” said Suzanne Henkels, a spokeswoman for the group.

Generally, experts say that augmented reality, the technology Pokemon Go uses to operate, could permanently change how energy workers and environmental scientists do their jobs.

“We’re seeing a lot of interest in the energy space,” said Eric Abbruzzese, a senior analyst at ABI Research, which forecast this year that the augmented reality market would grow from about $7 billion today to $115 billion by 2021.  Oil and gas companies, for example, are tapping the technology to repair oil rigs. The industrial sector, which includes energy companies, is expected to make up around 44 percent of the total smart glasses revenue market within five years, according to ABI.

“Among those interested is [the Energy Power Research Institute], which is working with at least seven utilities to test how various types of augmented reality applications may improve everything from worker safety to equipment repairs. Duke Energy Corp., the New York Power Authority and Consolidated Edison are among the partners. EPRI plans to release a report on its findings after the project ends next spring” (Marshall).

In order for Pokémon to appear randomly as players are walking around, Niantic Labs uses cellphone camera pictures of areas and overlays the images with random Pokémon.  “In a similar way, other types of augmented reality technology can insert 3-D diagrams, rotating structures, color-coded maps and pictures into the field of vision of workers using AR-equipped devices” (Marshall).

Most utilities have a catalog of where all of their assets are based on GIS so that information can be accessed to form an “overlaid reality” which can be downloaded to a pair of smart goggles, or on a tablet or phone.

John Simmins, a technical executive leading EPRI’s augmented reality work, explained how the technology could be pivotal after a power outage. “By wearing a helmet or glasses that show what a given location is supposed to look like, a worker can quickly see whether a hard-to-find power line or a transformer on a pole is missing. The information can then be sent quickly to headquarters with a voice command or wave of the hand sensed by the device.  After a major storm, people who are dispatched to assess damage may not have as much expertise as typical line workers,” Simmins said.  “It can really shorten the amount of time that the outages exist before they get worked on,” he said.

While the technology is not fully developed yet, the potential improvements it could have on the energy industry is clear to see.

Source: Marshall, Christa. “POKEMON GO: Pikachu Power: Can It Transform the Energy Industry?” E&E Publishing. Greenwire, 22 Aug. 2016. Web. 22 Aug. 2016.

FERC Releases Statement about PennEast Pipeline

Swamp Stomp

Volume 16, Issue 34

PennEast, a pipeline company, has proposed a plan to build a 118 mile natural gas pipeline in Pennsylvania.  The proposed pipeline project has received plenty of backlash from environmentalists.  Before PennEast can build the pipeline, the company needs to complete a regulatory review with the Federal Energy Regulatory Commission (FERC).

The FERC found that “The proposed PennEast natural gas-pipeline will result in some adverse ecological impacts, but they could be reduced to less-than-significant levels, according to a draft environmental impact statement prepared by the staff of a federal agency” (Johnson).  This response did not quell the angry critics.

Critics are deeply concerned about the environmental impact, which in some case is long lasting; the pipeline will have on wetlands, endangered species, historic resources, and other areas.  Those against the pipeline do not believe that the Federal Energy Regulatory Commission’s changes do enough to protect these threatened areas.  “Tom Gilbert, campaign director for ReThink Energy NJ and New Jersey Conservation, one of many environmental groups lobbying against the project says ‘It is impossible for FERC to assess the environmental costs of this project’” (Johnson).

Those who argue that PennEast should build the pipeline say that the pipeline will provide cheaper gas to homes and businesses.  PennEast views the FERC verdict as a victory on a project that has taken longer to get started than predicted due to a lack of information provided for the regulatory review.  “’This conclusion brings local homes, hospitals, businesses and schools one step closer to receiving a vital source of reliable, affordable energy,’ the company said” (Johnson).

The areas and animals the pipeline will traverse and that “it could affect four groundwater aquifer systems and a few public drinking wells in Hunterdon County, and cross more than 250 bodies of water, including the Delaware River, and 56 acres of wetlands. It would require more than 200 acres of agricultural land for rights-of-way, poses a risk to five endangered species, and traverse 22 parcels of preserved land in New Jersey set aside under the state’s Green Acres program” (Johnson).  “There is no demonstrated need for this pipeline, which threatens some of New Jersey’s most pristine streams and wetlands,’’ said Jim Waltman, executive director of the Stony Brook-Millstone Watershed Association, another critic who is against the pipeline being built.

Jeff Tittel, director of the New Jersey Sierra Club, said that the pipeline will never legally meet qualifications it needs to because the bodies of water it comes in contact with have anti degeneration regulations.  This means the quality of the water cannot be reduced.

Those who back the building of the pipeline say that “the pipeline … reflects recommendations in the state’s Energy Master Plan, which calls for a build-out of natural gas infrastructure in New Jersey as a way of reducing energy costs. Nevertheless, the pipeline is perhaps one of the most contentious of more than a dozen similar projects that are pending, approved, or proposed in New Jersey” (Johnson).

Actions have already been taken against the FERC’s decision.  “The Delaware Riverkeeper Network has filed a challenge in federal court, asserting FERC suffers from a conflict of interest, having never rejected a pipeline project.  The public comment period on the draft EIS ends September 5. PennEast said it expects FERC to make a final decision on the project in 2017, but numerous other federal and state agencies have yet to weigh in, including the New Jersey Department of Environmental Protection, which has refused to review permits for the project because officials say the application is incomplete” (Johnson).

Do you agree with the FERC’s decision?  Do you think PennEast will be allowed to build the pipeline?  Do you think the pipeline will be helpful or just harm the environment?

Source: Johnson, Tom. “Federal Agency Says PennEast Environmental Impacts Could Be Reduced.” NJ Spotlight. NJ Spotlight, 25 July 2016. Web. 27 July 2016.

Science Experts Ask the Candidates 20 Questions

Swamp Stomp

Volume 16, Issue 33

Science leaders are fed up with politicians for not discussing scientific issues on the campaign trail.  Politicians talk about their policies on issues they believe will sway voters.  They do not believe that issues on science, research, and innovation will have much effect on voters.  Science leaders believe that voters have the right to know politicians stances on issues ranging from climate change to cybersecurity.  Since the politicians are not discussing these issues on the campaign trail, some science groups decided to do something about this.

An association of 56 science groups and higher education created 20 questions about scientific issues that will help voters understand where Democrat Hillary Clinton, Republican Donald Trump, the Green Party’s Jill Stein, and Libertarian Gary Johnson fall regarding these issues.

The association started the questioning candidates in 2008 but expanded the questions in 2016.  ScienceDebate will post each candidate’s reply.  The main purpose of the questions is to attract voter and media attention to these issues so that candidates need to address these issues before Election Day in three months.

“We are encouraging journalists to ask these questions at every opportunity,” says Shawn Otto, the effort’s organizer, who is based in Minneapolis, Minnesota. “We’re in a new era where science is impacting people more than ever, and candidates will respond to what is on the minds of the public.”

The group was unsuccessful in forcing candidates to have a science related issues debate in the 2008 and 2012 campaigns so it is unlikely that one will occur during the 2016 campaign.  This does not mean that the group has given up on this goal.  In the meantime, the group has put a lot of thought and energy into creating questions that they hope will garner a written response from each candidate’s organization.

The final 20 questions chosen were taken from a list of 400 questions that were submitted by participating organizations.  “The new version reprises earlier questions on innovation policy, climate change, energy, food security, clean water, ocean health, and space. But some perennial topics have acquired a different focus; for example, the question about the internet has shifted from ensuring access to cybersecurity and privacy, and the question dealing with education now focuses on attracting more women and minorities into the scientific workforce rather than on boosting overall student achievement. There are also some fresh faces: Opioid addiction and mental health have cracked the list, whereas concern about safeguarding critical natural resources has fallen by the wayside” (Mervis).

According to Otto, the association purposefully omitted questions on issues that seemed too narrow.  Two examples of too narrow issues are funding a particular federal agency or reforming the Department of Energy’s network of national laboratories.  That does not stop specific organizations from hounding candidates on issues that they deem of great importance.  Case in point, the Association of American Universities (AAU), a Washington, D.C.–based group of 62 research universities, released their own letter to the candidates on August 9, 2016 that focused on four issues.  Coincidentally, only one issue, innovation, is on the associations list of questions.  AAU’s vice president for public affairs, Barry Toiv, says the association agrees with what ScienceDebate is attempting to accomplish even though it is not part of the association. “But we also feel it’s important to highlight the issues that our members feel strongly about.”

Source: Mervis, Jeffrey. “U.S. Science Groups Have 20 Questions for Candidates.” ScienceInsider. Science Magazine, 10 Aug. 2016. Web. 10 Aug. 2016.

Courts Rule Favorably for Oil and Gas Companies

Swamp Stomp

Volume 16, Issue 32

The Obama administration put forth rules about fracking on public lands that oil and gas companies did not like.  These companies believe that these regulations would be the first step to federal regulation of all fracking activity.  The Obama administration argues that these rules are solely put in place due to safety concerns within the industry.  These companies took the rules to court and a federal judge ruled in the oil and gas companies favor.  The White House does not agree with the judge’s ruling and plan to appeal the ruling.

The regulations were made by the U.S. Interior Department’s Bureau of Land Management (BLM) and were finalized in March 2015.  U.S. District Judge Scott Skavdahl made his ruling on June 21, 2016 stating that “the [BLM] lacked Congressional authority to set fracking regulations for federal and Indian lands” (Bailey).

The BLM’s regulations that Skavdahl struck down “would have required companies to provide data on chemicals used in hydraulic fracturing and to take steps to prevent leakage from oil and gas wells on federally owned land” (Bailey).  This would change the regulation of fracking from states to the federal level.

Fracking extracts oil and natural gas from underground by shooting high pressurized amounts of water, sand, and chemicals into the ground.

Not everyone is happy with the use of fracking to extract oil and natural gas.  “Environmental groups and some neighbors of oil and gas wells have linked fracking to water pollution as well as increased earthquake activity in certain areas” (Bailey).

Less than three quarters of U.S. fracking occurs on federal land so the ruling and the case has had little direct effect on the fracking currently operating.  Most of the 22 percent of federal land fracking is done from offshore Gulf of Mexico operations.

Though the effect these rules would have on current fracking operations would have been minimal, oil and gases companies were still concerned.  They worried that these mandates would lead to the federal government making all of the rules regarding fracking operations.

“Skavdahl, nominated by Obama to the bench in 2011, had put the rules on hold a year ago to weigh requests from energy industry groups and four states to stop them from being implemented. He issued a preliminary injunction against the rules in September and made it permanent in Tuesday’s decision” (Bailey).  Skavdahl said that the case was based on where the Interior Department had the authority to make these rules and not about whether fracking was good or bad.  Skavdahl ruled that the BLM overstepped its authority, given to them by Congress.

Skavdahl backed up his ruling by saying “Congress in the 2005 Energy Policy (EP) Act specifically removed hydraulic fracturing operations that do not involve diesel fuels from Environmental Protection Agency regulation under the Safe Drinking Water Act” (Bailey).

As with most regulations, there are those who support the rules and those who are against them.  The pro side argues that regulation is necessary due to the potential high amounts of pollution caused by fracking.  Those against regulation point out the growth in U.S. oil production, the lower energy costs, and the jobs created by the fracking industry.

This ruling, as well as regulation on fracking, continues to be a polarizing issue.  Do you agree with Judge Skavdahl’s ruling?  What are your thoughts on fracking?

Source: Bailey, David. “Court Strikes down Obama Fracking Rules for Public Lands.” Reuters. Thomson Reuters, 22 June 2016. Web. 25 July 2016.

Final EPA Landfill Methane Emissions Rules

Swamp Stomp

Volume 16, Issue 31

Landfill methane emissions rules have not been updated anytime in the past 20 years, but that is about to change.  On July 15, 2016, the US Environmental Protection Agency (EPA) released their final rules for new and modified municipal solid waste landfills and emission guidelines in regards to existing landfills.

The new rules require existing landfills to capture and monitor their gas emissions.  The rules reduce the levels of acceptable emissions by one third.  “The EPA expects the final rules to reduce methane emissions by about 334,000 tons a year beginning in 2025. The agency puts the climate benefits of the combined rules at $512 million in 2025 or more than $8 for every dollar spent to comply” (Hardcastle).

Reducing methane, a potent greenhouse gas that is 25 times more potent than carbon dioxide, will affect the environment.  The EPA hopes that these new rules will dramatically reduce the effects of global warming.  The Environmental Protection Agency is also hoping that these rules will drastically increase the quality of life for future generations.

The EPA feels that these guidelines will have a dramatic impact because “as landfill waste decomposes, it produces a number of pollutants, including air toxics, volatile organic compounds, carbon dioxide, and methane. Municipal solid waste landfills are the second-largest industrial source of methane emissions in the US, accounting for 20 percent of methane emissions in 2014, according to the EPA” (Hardcastle).

Luckily for these landfills and the planet, these emissions can be captured.  The capturing of these emissions is cost effective because the captured emissions can be used in place of other fossil fuel.  This helps the planet all around by reducing emissions released into the air, which will cut down on global warming, and it will reduce the use of fossil fuels that cannot be replenished or take a long time to regrow.

These rules were a long time coming.  They have been proposed before but are just now getting put into effect.  Proposals were made in July of 2014 and August of 2015, so it has taken two years for these proposed rules to be finalized and put into practice.  The rules update the 1996 guidelines for existing landfills.  As previously stated, these rules update guidelines written 20 years ago.

“In addition, the EPA’s Landfill Methane Outreach Program provides landfill owners and operators a suite of tools and technical resources to facilitate development of landfill gas energy projects. Over the last 20 years, LMOP-assisted projects have reduced and avoided more than 345 million metric tons of carbon dioxide equivalents” (Hardcastle).

Landfill methane emissions are not the only emissions that are getting revamped and reduced.  Methane emissions from the oil and gas industry have also been cut down.  The EPA announced final regulations to limit oil and gas emissions back in May.  As more and more people became concerned about global warming, the EPA has updated emissions guidelines to reflect this.

Do you agree with the EPA’s new guidelines for methane emissions for existing landfills?

Source: Hardcastle, Jessica. “EPA Issues Final Landfill Methane Emissions Rules.” Environmental Leader. Environmental and Energy Management News, 15 July 2016. Web. 19 July 2016.

‘Pokémon Go’ Connecting People with Wildlife?

Swamp Stomp

Volume 16, Issue 30

pokemon-1521104_640

The newest trend sweeping the nation is the app ‘Pokémon Go.’  The app forces players to leave their homes and explore their surroundings in order to catch ‘em all.  The type of Pokémon found depends on the area players are walking around.  In order to find water Pokémon, players need to be near water and so on.

While exploring and trying to find all of these Pokémon, players have also stumbled upon some real wildlife.  Some biologists have embraced this aspect of ‘Pokémon Go.’  These biologists believe that these situations can be turned into a learning opportunity.  Morgan Jackson, an entomologist and student in Canada tweeted “If you have your #PokemonGo Pokedex memorized but find a live species you don’t recognize, I’m here to help you identify it! #PokeBlitz.”  This was the start of others jumping on this bandwagon.

“For the past few days, players have been tweeting photos of the animals they encounter, hashtagging them #PokeBlitz, a play on “bioblitz,” an event in which people count all the living species in a designated area” (Brulliard).  Jackson, other biologists, and wildlife fans have all been tweeting the answers and if they do not know the answers they retweet the question to get more help.

“Pokémon’s creator would no doubt approve. Satoshi Tajiri grew up collecting insects in his countryside hometown outside of Tokyo. But the concrete of that megalopolis eventually encroached on his town, and bugs became harder to find. The virtual landscape he made, on the other hand, hosted hundreds of make-believe species — ones that enthusiasts could collect, sort and classify, just as Tajiri had once done with insects” (Brulliard).  Tajiri created a generation obsessed with collecting and learning about fictional creatures and ‘Pokémon Go’ maybe instilling in this same generation a thirst to learn more about wildlife on a lesser scale.

Identifying wildlife took an every bigger Pokémon turn when Asia Murphy, who writes about wildlife conservation at her blog Anati’ala, created a Pokédex for wildlife spotted while playing ‘Pokémon Go.’

Biologists are under no illusion that these players will become obsessive bird watchers, but that they believe the number of young people getting interested in the random wildlife they come across has increased.  In order to play ‘Pokémon Go,’ players are constantly looking at their screens to see what Pokémon are around them.  This means that just because players are in areas surrounded by wildlife, they may not be paying any attention to them.  The impact of identifying real life animals found while playing ‘Pokémon Go’ may not be groundbreaking but it is generating more interest in wild animals than there was before.

No matter your feelings on ‘Pokémon Go,’ as long as players continue to play the game and tweet about the animals they come across, there will be biologists ready and willing to identify these creatures for them.  Who knows the next step maybe players taking pictures of interesting plants they come across and asking nature enthusiasts to identify the plants for them?  Do you think ‘Pokémon Go’ is helping players learn about wildlife?

 

Source: Brulliard, Karin. “If You Must Play Pokémon Go, ‘catch’ Some Real Animals While You’re at It.” Washington Post. The Washington Post, 13 July 2016. Web. 13 July 2016.

Ensuring Environmental Justice for All

Swamp Stomp

Volume 16, Issue 29

On June 7, 2016 the EPA took a step towards trying to ensure justice for the environment.  The U.S. Environmental Protection Agency issued its first-ever Technical Guidance for Assessing Environmental Justice in Regulatory Analysis (EJ Technical Guidance).  This guidance represents a significant step towards ensuring the impacts of EPA regulations on vulnerable populations are understood and considered in the decision-making process (Lee and Maguire).

The purpose of the EJ Technical Guidance is to improve integration of environmental justice in the EPA’s core regulatory function.  Essentially, this better ensures that all Americans have access to some of their basic rights.  In particular the right to have access to clean water, clean air, and healthy communities.  The EJ Technical Guidance is enforced by the public and key stakeholders and they ensure that EPA rules are followed and that communities are not polluted beyond EPA regulations.

So how does it work? The EJ Technical Guidance equips EPA rule writers with key analytic principles and definitions, best practices, and technical questions to consider potential impacts on communities with environmental justice concerns. Each component helps us take complex issues and think about them in a consistent, step-by-step approach, while ensuring that sound science is the foundation of EPA’s decision-making process (Lee and Maguire).  This system gives the EPA a specific set of principles to consider when reviewing potential environmental justice concerns.

The finalization of the EJ Technical Guidance realizes the last commitment made under Plan EJ 2014, and sets the stage to deliver on key aspects of the draft EJ 2020 Action Agenda, EPA’s next environmental justice strategic plan for 2016-2020.  Through EJ 2020, the EPA will consider this guidance when addressing EPA rules that have EJ concerns.  This will be accomplished by implementing guidance, training, monitoring, evaluation and community involvement, including periodic assessments of how EPA is conducting EJ analyses (Lee and Maguire).  EJ 2020 is not just going to rely on the EJ Technical Guidance to get everything right, the EPA is going to strive to constantly learn more about EJ concerns and to improve upon the EJ Technical Guidance system.

If the EJ Technical Guidance system works the way it is designed to, it could be the first step towards ensuring environmental justice for all Americans.  It is too early in the EJ Technical Guidance’s life to determine whether the system works or not.  It is unknown how the public will react and if they will take their participation seriously.  Only time will tell just how effective and important the EJ Technical Guidance system is to ensuring justice for the environment.

Source:

Lee, Charles, and Kelly Maguire. “Incorporating Environmental Justice into All Regulatory Efforts.” The EPA Blog.  EPA, 7 June 2016. Web. 8 July 2016.

Fish and Wildlife Special Agents

The Swamp Stomp

Volume 16, Issue 27

Many of us are have become familiar with the work of criminal investigators, because this subject has infiltrated television and movies.  For instance, we are familiar with many of the activities required to solve a crime: collecting evidence, interviewing witnesses, conducting surveillance, planning raids, and helping prepare cases for court.  But what most of us don’t realize is that the victims in some of these cases are not people, but rather wildlife.  Special agents of the Fish and Wildlife Service investigate crimes related to wildlife.  They enforce federal wild life laws, prevent smuggling, conspiracy, money laundering, and fraud.  They also investigate the killing of endangered or protected wildlife and work with industry groups and companies to reduce hazards to wildlife.

These special agents often work undercover and in covert operations.  They don’t wear uniforms, generally remain anonymous, and rarely give interviews.  Special agents must be in excellent physical condition, pass mandatory drug tests and psychological screenings, and have a four-year degree in wildlife management, criminal justice, or other related field.  And only the best of the best are accepted.  There are currently only 250 special agents working for the Fish and Wildlife Service.

Why does the Fish and Wildlife Service need a class of covert special agents?  While illegal activities involving wildlife are not often an apparent problem to the general population, they do frequently occur.  Illegal trade in wildlife is second only to narcotics.  Special agents often go undercover to infiltrate trafficking rings and illegal guiding operations to document violations.  The black market for wildlife is estimated to be worth more than $20 billion.  These animals are often smuggled into the United States as a part of the pet trade or for collectors.  And preventing this illegal trade is extremely important, because illegal wildlife trade can lead to mass extinction of species.

When an animal is recovered from an illegal operation, the Service cannot release it back into the wild because the animal is evidence and also it is unfit to survive alone after living in captivity.  Every time a wild animal is captured for illegal trade, there is one less animal to contribute to its natural population.

The best ways for individuals to help prevent illegal wildlife trade is to stay informed.  Asking questions and getting the facts about wildlife can help prevent the success of smugglers.   Also educating others to do the same thing is important.  In addition, pushing governments to pass and enforce laws that reduce demand and impose deterrents can help.

Although not well known, the special agents of The Fish and Wildlife Service provide an important function in our environment.   The job of the special agent is to uphold the objectives of the Fish and Wildlife Service.  These objectives are: to “Assist in the development and application of an environmental stewardship ethic for our society, based on ecological principles, scientific knowledge of fish and wildlife, and a sense of moral responsibility,” to “Guide the conservation, development, and management of the Nation’s fish and wildlife resources,” and to “Administer a national program to provide the public opportunities to understand, appreciate, and wisely use fish and wildlife resources.”

Error in Calculating Absolute Percent Coverage

The Swamp Stomp

Volume 16, Issue 26

Last month I wrote an article about measurement error when calculating absolute percent coverage in the vegetative portion of wetland delineation.   The discussion centered on the differences that I observed between various assessors when measuring the absolute percent coverage in the same plot.  In the article, I discussed the concept of measurement error and how it was present in virtually all measurement processes, especially ones in which people had to make qualitative judgments.    After the article ran, we received feedback from readers who felt that the methods used in the wetland industry for calculating absolute percent coverage did indeed have significant variability.

I decided to perform an analytical study to quantify the error that exists when determining absolute percent coverage.   I took the opportunity to conduct a study during one of the Swamp Schools plant identification classes.    We asked four students to measure the absolute percent coverage of a 30’ radius plot.  Each student measured the area two times, once at the beginning of the class and then 6 hours later.  We assumed that on the second attempt they would not be able to memorize the measurements from the morning, and hence would provide two unbiased repetitions.  The students were told by the instructor which tree species were present in the sample plot.   The data below summarizes each student’s readings of the percentage coverage of each species.

table1

As you can see from the data, the largest source of error was across operators.  There was significant variability from operator to operator in measuring the percent coverage of a particular species, as observed with the tulip poplar and the red maple.  This type of error is called reproducibility.  The other type of error is called repeatability and is calculated from the variability caused by the same operator making repeated measurements of the same species.

I analyzed this data using the Analysis of Variance method.  This method measures the amount of variability induced in measurements by the measurement system itself, and compares it to the total variability observed.   The total variability is divided into two components: product and measurement.  The measurement is then further divided into repeatability and reproducibility.  And then reproducibility is divided into operator and operator-to-part interaction.

The goal is to have high product variation and low measurement variation.  This means that your measurement system can distinguish between the different things that you are measuring.   A measurement system is considered acceptable if a maximum of the 30% of the total variation is caused by the measurement.    The results below are the Analysis of Variance results from the absolute cover percentage study.

table2

As you can see the measurement error from this study was an amazingly high 70%!    And the reproducibility, caused by the operator-to-part interaction was 44.55% of the total variation.  This means that the measurement of a particular plant species was strongly correlated to the person that was taking that measurement.   The graph below demonstrates the differences in average measurements by each operator for each species of plant.

chart1

This study certainly proved that there is significant measurement error when calculating absolute percent coverage.    Measurement systems that have this amount of error are not capable of providing reliable results and will lead people into making incorrect decisions.  In regards to wetland delineations, that could mean making an incorrect decision in accessing whether or not an area is a wetland.  Obviously, this type of error can have costly ramifications for the company that is performing the delineation.

But for every organization that has a poor measurement system there also another one that has a good system.  This means that improvements can be made to reduce the error in your measurement system.   The key is to first quantify the amount of error that exists in your current measurement system.  After that you will be on your way to making improvements in your data collection methods.  Improved data collection means that your decision making will be improved.

Western Wetlands

The Swamp Stomp

Volume 16, Issue 25

Residents of the San Francisco Bay Area recently approved an unprecedented tax on Tuesday June 7 to fund the restoration of lost wetlands. Known as Measure AA, the tax is expected to raise as estimated $25 million a year for the next 20 years.

The Environmental Protection Agency has found that the Western U.S. has the country’s sickest wetlands. In the San Francisco Bay Area, wetlands have been paved, diked and invaded by weeds at a rate unmatched elsewhere in the U.S.   An assessment based on more than 1000 wetland surveys conducted in 2001 concluded that while nearly half of the wetlands in the continental U.S. are in good shape, only one-fifth of the wetlands in the Western U.S. are doing well.

In California, the destruction of wetlands, has been even worse than in other areas of the west. An estimated 90 per cent of California wetlands have been lost over the last two centuries. The steep cliffs of the Pacific coast contained fewer natural wetlands than are found on the Atlantic coast.

Much of California’s wetlands were concentrated on rivers and around the banks of the San Francisco Bay. These areas have been paved over and built up. Additionally, ships in the Bay introduce invasive species, which has left the area with one of the words infestations of invasive wetland weeds in the United States.

Groups such as the Golden Gate Audubon Society use volunteers to help clean up wetlands in the San Francisco area. They host monthly workdays during which volunteers can sign up to remove invasive plants and pick up trash in areas such as the Pier 94 waterfront. The Pier 94 wetland restoration began when a shoreline on a Port of San Francisco property collapsed into the water and began to return to marshland. A decade ago, heavy trash such as pieces of pavement was cleared away, creating a place for plants to take root.

Coastal wetlands such as these may be important around the nation as sea levels rise. Coastal wetlands can help ease flooding and erosion as sea levels are getting higher. By growing taller as seas rise, marshes and other wetlands are increasingly valuable as buffers from the possible effects of climate change. It is estimated that seas may rise two to six feet over the next two centuries.

Wetlands are also helpful to filter pollution from the water and to provide habitats for multiple species of plants, fish, and animals. They improve water quality by trapping sediments and retaining excess nutrients and other pollutants such as heavy metals. These purification functions are especially important when a wetland is connected to groundwater or rivers and lakes that are in turn used for human activities and as a habitat for wildlife.

There are also economic benefits associated with the preservation of wetlands.   Without wetlands communities may have to build flood control or water treatment systems to replace the functions that are naturally provided by wetlands.  Is so, these costs could be much higher than those of preserving natural wetlands.  Also, wetlands provide valuable fish habitats, that if lost could be detrimental to the recreational and commercial fishing industries.

Wetlands perform a number of significant ecological functions that are not known by most people.  Over 100 years ago, some organizations campaigned for the elimination of wetlands, as they were considered a nuisance.  Now ecologists, scientists and environmental groups recognize the environmental benefits that wetlands provide, and hence have raised the public awareness of the importance of preserving them.    This type of awareness has made a difference in cities such as San Francisco where significant tax dollars are being used to restore wetlands.    Because of this increased awareness and the subsequent efforts being done by some communities in the western U.S., it would be expected that we will see increased efforts to improve wetlands in the 21st century.