DAVEY MITIGATION的动态

Great, positive story about the Gold Coast beaches and their present condition! Noted that the "natural phenomena" is very much taken into consideration when designing coastal management in this area. Sand typically moves onto the beach in calmer swell conditions from the nearshore zone (area where active offshore sand movement area occurs). The City of Gold Coast has been to strategically placing dredged sand in this nearshore zone since the late 1980's to play into the natural process (ie. "work with nature"). Nearshore nourishment was actually trialled and developed on the Gold Coast in 1985 with ICM's founder Angus Jackson betting his job on the line that it would be successful. Luckily it was. And, it continues to be a well used practice in the region. We will also be implementing the process of nearshore nourishment over in California on the upcoming coastal resilience project, RE:BEACH. In summary, understanding the natural processes means that we can actually design accordingly to work with nature and create "nature based solutions" or "nature based approaches". Nearshore nourishment in conjunction with many other structures and strategies on the Gold Coast make it one of the most innovative and unique coastal communities in the field of coastal resilience building. So, congratulations to all those involved in keep this stretch of coastline iconic and adaptable. For more info on nearshore nourishment, check out this link: https://lnkd.in/gAZG_svF Story by Nine #nearshorenourishment #sandnourishment #coastalmanagement #goldcoast #workingwithnature #naturebasedsolutions

As per Aaron’s post, the Gold Coast dunes are definitely in good condition adding much needed “nature based” reliance . This is not luck but a direct result of: 1. A history of community appreciation* of the dune value as an important part of a resiliant coastal system, and 2. The implementation by Council of both physical dune vegetation works** supported by town planning policies***. * The storms in 1950s & 60s provided a clear demonstration of the physical & economic benefits of well vegetated urban dune systems when the severe storms in that period removed the then narrow and poorly vegetated dune systems by waves and winds (1967 photo following shows the eroded state. The wave storm cut redistributed sand from the upper visible beach and formed large and useful stormbars offshore while the strong onshore winds deposited sand from the beach and dunes on esplandes and beachfront parks and lawns where it was lost from the active beach system. These erosion events decimated the local tourist industry and the lessions became embedded in the GC dna. ** Dune systems were created to seaward of the seawalls after the first upper beach mass nourishments in the late 1970’s (see following 1975 photo of surfers Paradise with fenced off but bare dunal areas) and refined in the 1980’s with the second wave of large scale nourishments (upper beach and nearshore). A lot was learned about native dune vegation from experimentation and the Qld Govt dune research station at the northern end of the city. We initially planted the dunes with native plants sourced from the reseach station and used planes and helicoptors to aerial fertilise the new dune vegetation. Now there are large stocks of native vegetation that re-establises naturally after erosion events. ***One key dune builder was the policy we introduced in the mid-80’s that all excess sand from building sites within 500m**** of the seawall line was to be placed along the dunes, vegetated and stabilised with fences. Over 2Mm3 of sand has been added to the dunal system and vegetated by developers at no cost to council. Previously sand excavated for high rise basements was sold by developers. Guidelines were developed for this work and added to the town plan in ~1990 as policy #15. This policy has been developed and different catagories of dunes added ranging from to intensive public non-urban to cater for different uses and pressures. **** This benchmark policy first was adopted in 1985 as part of our initial preparation for SLR. I took the draft policy with a setback distance of 100m to Council’s then Beaches and Waterways committee with the argument that a healthy beach system added value to beachfront deveopments but expecting a pushback as it was not going to be popular with developers. I was very surprised when the Committee chair, Cnr Comber, amended it to 500m! A great legacy to building beach resilence in the face of SLR that has been adopted, with other GC practices around the world.

?? Cover Description for September issue of PE&RS. ?? Roughly 20,000 years ago, the Laurentide Ice Sheet smothered what is now southern New England beneath a thick layer of ice. The leading edge of this hulking mass plowed into the landscape as it advanced, depositing piles of debris called terminal moraines at its southernmost extent. These piles of glacial till became the foundation for the archipelago of islands that now flank southern New England: Long Island, Nantucket, Martha’s Vineyard, and Block Island. Block Island is visible in these images, acquired on July 3, 2024, by the OLI (Operational Land Imager) on Landsat 8. The pear-shaped island, located about 9 miles (14 kilometers) south of mainland Rhode Island, is about 6 miles long and 3.5 miles wide. Roughly 1,400 people live on Block Island, mostly in the town of New Shoreham. A combination of sunglint and a phytoplankton bloom made the wakes trailing behind the many boats near the island especially visible at the time of this image. Great Salt Pond, once a freshwater pond, became tidal in 1905 when the U.S. Army Corps of Engineers dug a 0.6-mile-long channel to the ocean. The channel helped turn Great Salt Pond (also called New Harbor) into one of the most popular harbors in the Northeast, attracting about 1,500 boats to its three marinas on any given day in the summer. The smaller Old Harbor on the east side of the island is protected by a breakwater and serves as the main entry point for ferries arriving from Rhode Island, Connecticut, Massachusetts, and New York. The harbor also contains slips for commercial and charter fishing boats. Five wind turbines form a line several miles southeast of Block Island. The turbines, installed in 2016 as part of the first offshore wind farm in the United States, replaced five diesel generators. Now, just 10 percent of the electricity they generate powers all of Block Island. The rest is exported to the mainland. Conservation areas span about 40 percent of the island, including much of the land north of Great Salt Pond. The Block Island National Wildlife Refuge is one such area and hosts more than 70 species of migratory songbirds, as well as the largest colony of gulls in Rhode Island. The refuge also provides habitat for the American burying beetle, a large black-and-orange beetle that feeds on carrion. When the beetle was listed as endangered in 1989, the community on Block Island was just one of two populations known to remain in the United States. The beetles were recategorized as threatened in 2020. NASA Earth Observatory images by Lauren Dauphin, using Landsat data from the U.S. Geological Survey. Story by Adam Voiland. Both images can be viewed online by visiting the Landsat Image Gallery, https:// landsat.gsfc.nasa.gov/, image id 153135. ??Sneak peak of this issue?? https://conta.cc/3AIz8Q8

Lakes serve as crucial resources for transportation, recreation, and economic development. However, maintaining their accessibility and functionality requires meticulous planning and management. Details on: https://bit.ly/3WPGFFS

Evaluation of beach response due to construction of submerged detached breakwater - Frontiers in Marine Science: Submerged detached breakwaters (SDBWs) have increasingly been used in recent times as an alternative against their emergent counterpart (EDBWs) to mitigate erosion because the former do not spoil the seascape. Both of these structures are (usually) constructed using precast concrete blocks or natural granite rocks, hence becoming permeable structures. For an EDBW, a parabolic bay shape equation can be readily used to estimate the planar shape of the shoreline behind the structure, but there is still no approach to estimate how the shoreline behind the SDBW is formed. In this study, we estimated how the shoreline is balanced by examining how the dominant wave direction changes due to the diffraction of the transmitted wave generated after the installation of the SDBW from the long-term wave directional spectrum. The change in dominant wave direction was determined under the shoreline gradient condition where littoral drift does not occur, considering the diffraction phenomenon due to the difference in transmitted waves. This means that the shape of the equilibrium shoreline changes to face perpendicular to the dominant wave direction. As a meaningful result, when the transmittance is 0, it converges to the well-known empirical equation of EDBW. The present methodology is validated by comparing the observed data (wave and shoreline change) from two beaches (Anmok and Bongpo-Cheonjin Beaches) on the eastern coast of Korea. This rational approach to shoreline changes behind permeable SDBWs will help in proactive review work for coastal management as well as beach erosion mitigation. https://lnkd.in/gii_esAq

Hops to see a massive attendance and impact from this years - ReMeMaRe Conference 2024: Restoring Estuarine and Coastal Habitats - 10th - 11th July, Scarborough Day 1: 10:00 – 17:00 | Day 2: 09:00 –13:00? Registration Open?| Outline Programme released & Call for Abstracts? ? The Environment Agency and Ocean & Coastal Futures are coming together together again for the Restoring Meadow, Marsh, and Reef (ReMeMaRe) Conference 2024. ? Bringing together restoration practitioners, Government bodies, environmental Non-Government Organisations (eNGOs), industry and businesses, from across the United Kingdom, with a shared vision to restore our estuaries and coasts. Providing a welcoming space for knowledge exchange and discussion on latest developments in coastal restoration science, practice, and policy. ? This 2024 programme includes five sessions across two days, on current and future opportunities and challenges, illustrating progress and evolving practice and discussing how we achieve our restoration targets. ? https://lnkd.in/e7eFdweg ? Call for abstracts for talks?and?posters now open: Abstracts are invited for ten-minute presentations and poster submissions.? Talks?(deadline for abstract 6th?May 2024) ReMeMaRe Session themes 1.??Restoration in Action We want restoration projects across the UK to share their experiences – good and bad, to help us all develop best practice. This session will showcase pioneering examples of restoration on the ground. 2.?Investing in Restoration We know that securing funding is one of the main challenges to restoration, therefore this session will discuss business needs and what we need to boost investor confidence in estuarine and coastal restoration. 3. Restoration through collaboration.? Exploring how working in partnership brings multiple benefits to restoration. Whether through working with communities and using citizen science approaches, with the additional societal well-being this participation provides, or between organisations and sharing resources to achieve common goals. 4. Science During this session we will host talks that present the most recent scientific findings relating to the ReMeMaRe focus habitats (oyster reefs, seagrass, saltmarsh/es, kelp), that are of relevance to informing and delivering restoration?at scale. 5. Evolving policy and regulation This session will focus on what evolution is necessary in policy and regulation to enable projects to accelerate their delivery, so we achieve our ambitious restoration targets.

2024: the 50 year anniversary of the first mass nourishment for resiliant beaches along the Gold Coast, Australia. In 1974, the first ocean beach nourishment was commenced on the Gold Coast with 1.5Myd3 (pre-metric age) pumped onto the Surfers Paradise and Main Beach beaches. The sand was pumped from the sand bars in the Broadwater with a large cutter suction dredge. The photo shows the new wider beach in front of surfers Paradise with the narrow un-nourished beaches to the south (updrift). The nourished beaches acted as a sand groyne to widen the beaches beyond the pumping limit. In hindsight, an incredible feat at the time for the council engineers and technical staff (led by Jack Cronin, Phil Hill, Sam Smith and Frank Goetsch) of a small city to design and implement with technical support from the Qld Beach Protection Authority (led by Brian McGrath) but only a 25% State funding contribution. When I was employed as Council’s coastal engineer in 1981, I was very fortunate that these pioneers mentored me and supported me when I proposed innovative pilot projects (eg nearshore nourishment, sand filled geotextile structures, ….) and tough planning policies. “Do Nothing” was NOT a socially or economically acceptable option in 1974 (and now). During the 1950’s and 60’s severe erosion had occured and many beachfront homes were relocated landward or removed (retreat). In the 1967 storms (7 back to back) engineered seawalls were constructed to protect the main esplanades and adhoc works to protect homes. The strategy adopted was to widen the beaches with sand and build resiliance. The 75% funding required to be provided by the city has turned out to be a major contributer to developing long-term cost effective and sustainable integrated coastal management solutions. Being funded at local government level these works have needed a high level of public support built on public education and input. This ongoing development, supported by the public, has maintained resiliant sandy beaches and positioned the Gold Coast into the future.

Experience the beauty and joy of nature as you explore the incredible revegetation projects by Bass Coast Landcare Network!??? Watch their video highlighting the stunning landscapes transformed through dedication and eco-conscious efforts. ?? https://bit.ly/49LNg7o ? Each property featured in the video is a testament to sustainability, either holding Certification of an Environmental Account with Accounting for Nature or undergoing development to establish a baseline measurement of the state of nature.????? ? The baseline measurement using our Standard helps achieve several benefits to:? ?? Monitor progress:?It helps track changes in biodiversity and ecosystem health over time.? ?? Guide conservation efforts:?Provides valuable data to inform future land management decisions and conservation strategies.? ?? Demonstrates impact:?Offers concrete evidence, based on robust science of the positive effects of revegetation efforts? ? Ensures accountability:?Allows for transparent reporting on their environmental initiatives and their outcomes. ? #BassCoastLandcareNetwork #Revegetation #Sustainability #NatureConservation #EnvironmentalAwareness #EnvironmentalAccounting #MakeNatureCount Landcare Australia Melbourne Water ?

In land-scarce Singapore, not only do we grow upwards, we are also growing downwards. This article contains very descriptive image and explanation on how Cross Island Line (CLS) is to be constructed.

To avoid harming flora and fauna, the Cross Island Line is going as deep as 70m below ground, about the height of a 25-storey HDB block. #MRT #CRL #CrossIslandLine