Good example of former flooded wetland areas subsiding through the draining of the area--6 feet of vertical elevation loss, 1924-2009. A good way to show what happens to exposed organic soils when these (former) wetland soils are drained and exposed to the open atmosphere.
The last time period rate of elevation loss may be due to the fact the soil has been pretty compacted in the decades before and a lot of the organic material has been oxidized and lost. It would be good to see what the composition of the remaining soil.
This is seen across wide areas of coastal Louisiana and the northern Gulf. This loss of soil organic material, the compaction and other subsidence effects and the rise of sea levels- all making a relative sea level rise rate about 4 times greater than a coastal area like Pensacola.
The big issue now is to see this occurring at a very rapid rate in Carbon emission/loss of the northern tundra through melting and fires. The release of carbon (CO2) into the atmosphere from this can be very large.
A report published by Marsh, a leading insurance broker and risk adviser, and a wholly-owned subsidiary of Marsh & McLennan Companies, says bathymetric data, which produces 3D images of seabeds, is "inadequate or non-existent" for large tracts of national and international waters.
In order to support the growth of the global shipping industry, governments around the world need to invest more in creating and sharing accurate hydrographic information, says Marsh.
Marsh’s report, 'Plumbing the Depths: Hydrographic Concerns for Modern-Day Large Vessels,' highlights how increasingly large commercial vessels with greater length, width, and depth are navigating vast areas of the world’s seas and oceans. These areas are either unsurveyed or have not been re-surveyed since lead-line soundings were used to measure fathoms nearly a century ago.
According to the International Hydrographic Organization, nearly half (49 per cent) of the UK’s coastal waters up to 200m have been adequately surveyed to modern standards, with Japan at 46 per cent and Australia at 35 per cent. In the Arctic Peninsula, an increasingly popular destination for cruise ships, virtually all coastal waters up to depths of 200m have not yet been surveyed.
“This is a pivotal decade in the development of the global maritime industry given the enormous proportions of commercial vessels now plying waters around the world,” said, Marcus Baker, Chairman of Marsh’s Global Marine Practice.
“The new Suez Canal allows nearly double the previous maximum of vessels to transit the Canal each day; and the new Panama Canal, with its new locks and deeper channels, is set to open later this year. More government investment in hydrographic surveys and the sharing of accurate bathymetric data and hydrographic information is imperative, to protect vessels and the crews that serve on them.”
In January 2016, the International Maritime Organization (IMO) was granted powers to audit the performance of countries in fulfilling their safety of life at sea (SOLAS) obligations, including the collection and compilation of hydrographic data and the publication and dissemination of all nautical information necessary for safe navigation. However, the IMO currently has no authority to compel countries to fulfil these obligations.
Article Credit: Dredging News Online at http://www.sandandgravel.com/news/article.asp?v1=22679.
Come join us for the Southeast Chapter’s 5th Annual Crawfish Boil on Wednesday, April 13th, 2016 from 6:00 p.m. to 8:00 p.m. at Pat’s Fisherman’s Wharf in Henderson.
Our guest speaker will be Brian Busey, THSOA National President. Brian will give a presentation/update on the activities of THSOA-National.
It will be all you can eat crawfish and fixin’s for only $35. To attend this event, please register online via the THSOA website at www.thsoa.org/event-2152671 or email (firstname.lastname@example.org, laginla@Hotmail.com or email@example.com). Registration closes April 11th.
We also are offering sponsorships. All sponsors will have their company logo on the event banner and acknowledged at the event. Platinum sponsors will have their logo and acknowledged on the Southeast Chapter web site.
All proceeds from this event will go toward funding THSOA-Southeast Chapter’s Student Scholarship Awards program.
For platinum/gold/silver/bronze sponsorship opportunities or if you would like to donate a door prize please contact Kim Dailey @ firstname.lastname@example.org or Linda Guillory @ email@example.com.
Thank you to everyone who voted online and also who attended the annual general meeting and voted. Below are the Southeast Chapter board members for 2016.
In accordance with the Society's by-laws, THSOA Southeast Chapter will be holding a vote for the following positions: Chairman, Secretary, Treasurer, Technical Chairman and Membership/Student Liaison Chair for each state. The voting will be open from January 14th, 2016 until noon January 20th, 2016. If you are a current member, you should be receiving an email with information about casting your vote. This email has already been sent out, so if you did not receive it, it could be in your spam folder or we might not have a good email address for you. If you think you should have received an email and did not, please contact firstname.lastname@example.org and we will look into it.
If you plan to attend the annual general meeting on Wednesday January 20 at 6pm at Pat’s Fisherman’s Wharf you can cast your vote then.
Results will be announced on Thursday January 21.
The Southeast Chapter of The Hydrographic Society of America is pleased to announce the recipients of our 2015 Scholarship awards.
Anne Marie Stonestreet – The University of Southern Mississippi
James Smith – University of Florida
Gail Johnson – South Louisiana Community College
Celeste Woock – University of New Orleans
What an awesome time at the THSOA-Southeast chapter Gumbo Rumble.
A big thank you to our sponsors, who without you this event would not be possible.
Navigation Electronics Inc.
Congratulations to our winners
1st place Surf- C.A. Richards
2nd place Surf- Aqua-Tech Services
1st place Turf- Navigation Electronics Inc.
2nd place Turf- Hydroterra Technologies
Fan Favorite- Hydroterra Technologies and C.A. Richards (tied)
THSOA-Southeast Chapter nominations for the Board is now open. Elections to be held January 13-20, 2016
The Hydrographic Society of America-Southeast Chapter (www.thsoa.org/Southeast-Chapter) is a non-profit organization which seeks to educate its members and the general public about hydrographic surveying. The officers are all volunteers and receive no compensation for their time and efforts. With leadership and drive from the top, this chapter can continue to provide scholarships to students in our region and also to provide informative presentations and social events. We need dedicated individuals to help give some time back to their profession!
We are hoping that others with energy and some time will step forward to help the chapter to continue moving forward.
Beginning the 1st of December, the chapter will accept nominations for members to serve in the following roles
If you are able to donate some of your time and effort to the chapter, you will consider running for one of the positions. Once nominations have closed (Jan 13, 2016), we’ll hold an on-line election for Chapter members for positions with two or more nominees. Additional voting (for people who didn't vote on-line) and results will be announced at our AGM on January 20, 2016
Nominations may be sent to email@example.com or firstname.lastname@example.org We’ll check with each nominee to confirm their willingness to serve.
Article Taken from CPRA
Today the CPRA made a recommendation to advance both the Mid Barataria (75,000 cfs) and Mid Breton (35,000 cfs) sediment diversions to engineering and design. This recommendation is based, in part, on recent results of a suite of diversion studies initiated in late 2013, in response to concerns raised by various stakeholder groups. The announcement comes several months in advance of a formal request for the additional funds needed for engineering and design. The funding request will be included in the CPRA’s Annual Plan, which will go before the CPRA Board and the Louisiana Legislature in early 2016.
“Decades of studies have suggested the importance of diversions,” said CPRA Board Chairman Chip Kline. “The analysis conducted as part of the 2012 Coastal Master Plan further indicated that sediment diversions are essential to sustaining coastal Louisiana. With predictable funding becoming available as a result of the oil spill settlement, we have the opportunity to invest in systemic restoration tools like diversions, which mimic natural processes by reconnecting the river to the delta. In doing so, we anticipate extending the longevity of many of the more substantial marsh creation projects called for in the master plan. As we transition to these larger projects, the Board recognizes that this work will become increasingly more difficult. That is exactly why we approved the request for funds to conduct these studies and why we continue to utilize this forum to engage resource agencies, stakeholder groups and members of the public in these difficult but necessary discussions.”
In late 2013 the CPRA Board approved the use of approximately $13 million to advance a suite of studies related to the lower Mississippi River sediment diversions proposed in the 2012 Coastal Master Plan. The goal of those studies was two-fold: to address concerns raised by various stakeholders and to allow the CPRA to better understand benefits and limitations of the proposed projects. The funds utilized to conduct the studies were made available through criminal settlements associated with the Deepwater Horizon oil spill. The settlements included approximately $1.27 billion to be directed to the National Fish and Wildlife Foundation (NFWF) specifically dedicated for barrier island and diversion projects in Louisiana.
“As these studies have matured and the results are coming in, we’re continuing to have confidence in the ability of sediment diversions to maximize our use of riverine resources to create a more sustainable footprint for coastal Louisiana,” said CPRA Executive Director Kyle Graham. “It became evident through our preliminary analysis that the Mid Barataria and Mid Breton diversions should be prioritized to advance into engineering and design. While this recommendation is a very important step we still have much work to do prior to implementation. We anticipate the engineering and design work will take several years. During that time we will further refine our analysis, develop an operational regime and continue to engage the public as we progress through the design and permitting process.”
The studies utilized some of the most advanced modeling tools available, such as Delft 3-D, CASM and EwE to predict changes that could potentially occur as a result of implementing sediment diversions. A complementary effort using outputs from these models is underway to investigate and understand potential socioeconomic impacts. In evaluating the modeling results, the CPRA is considering a number of factors including the projects’ ability to build or maintain land, effects on the river, changes in water levels, changes to salinity, habitat diversity and quality, abundance and distribution of fisheries and economic trends. In addition to analyzing modeling results, the CPRA is also considering project costs, funding availability and continued feedback from stakeholders.
Throughout the next several months, the CPRA will conduct approximately 20 key briefings to discuss these results in further detail with various stakeholder groups.
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