Archive for the ‘Erozija obala’ Category
The Totland landslide continues to show signs of movement and remains hazardous to the public.
The Isle of Wight Council has strongly advised people to avoid the area following the landslide last year and said the sea wall would remain closed for the foreseeable future.
Specialist coastal management consultants have been appointed by the authority to assess the site and are due to report back with their findings, including possible solutions, next month.
According to a council report, published last week: “The brief for the consultants requires them to develop a clear understanding of the mechanisms which led to the landslide, to investigate whether further failures are likely along the Totland to Colwell coastline, to propose costed options for repair and then identify which, if any, of the potential solutions would qualify for national Environment Agency grant aid funding.
“Unfortunately, it is clear the landslide remains active and the public must still be excluded from the area.”
A council spokesman added: “The landslide continues to show signs of movement, and now the sea is washing through the gaps in the damaged wall eroding the soft material behind. It is very hazardous.”
The high cliffs of Eastern Siberia – which mainly consist of permafrost – continue to erode at an ever quickening pace. This is the conclusion which scientists of the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research have reached after their evaluation of data and aerial photographs of the coastal regions for the last 40 years.
According to the researchers,
the reasons for this increasing erosion are rising summer temperatures in the Russian permafrost regions as well the retreat of the Arctic sea ice.
This coastal protection recedes more and more on an annual basis. As a result, waves undermine the shores. At the same time, the land surface begins to sink. The small island of Muostakh east of the Lena Delta is especially affected by these changes. Experts fear that it might even disappear altogether should the loss of land continue. …
Published on Oct 14, 2013
… bluff along the Strait of Juan de Fuca west of Port Townsend, Wash., has been eroding.
At about 6 p.m. Oct. 13, 2013 a section of the bluff just east of the old Army observation post fell.
Port Townsend resident Kellie Henwood had just crossed the existing slide when the new landslide occurred.
A huge section of cliff crashed into the sea at a popular resort, covering holidaymakers and residents in a cloud of red dust. The rose-coloured rocks fell 200ft after the massive landslide, half-a-mile from the town of Sidmouth in Devon.
The area on the Devon coast is prone to landslides, with some residents worrying their homes will soon be next.
Locals first knew of Wednesday’s landslide when they heard a massive rumbling sound coming from the cliff face. They looked up to see a huge chunk of rock plunging into the sea while throwing up a towering dust cloud.
The slip occurred near properties at the notoriously unstable Pennington Point, where homes edge ever closer to the sea with each collapse.
Richard Thurlow, chairman of campaign group Save Our Sidmouth, said: ‘It was a fairly major one, quite immense. Rockfalls along the Devon and Dorset Jurassic Coast are common, though rarely as dramatic.
At Pennington Point, 12 properties are at risk of falling over an eroding cliff edge, which is said to be losing land at up to 13ft a year. …
Published: July 17, 2013
This sequence of still photographs were captured just as a cliff section was collapsing on the beach of St Jouin Bruneval in Normandy (49.63907°N, 0.1490°E). My colleague, Pierre Pannet from the BRGM (French Geological Survey) office of Normandy had just been called in by the Maire of the district as a collapse had occurred the day before. When he got onto the beach, a new cliff section collapsed in front of his camera.
At this location, the cliff is made of something like 50m of chalk resting on the Gault clay horizon. This clay unit is weak and impermeable. It must have kept a perched water table weakening the base of the chalk face. Rains have been particularly heavy in the last 12 months, though on July 15 the weather was fair and sunny. Note that the tide was just starting to rise again. Neither the rain nor the sea beating the base of the cliff can be considered as the direct cause of collapse. It is more likely that it is the slow flow of saturated clay that has initiated the rupture and a sudden acceleration of that slow slip that caused the chalk “towers” to collapse.
Looking at the detail of the collapse, two towers of chalk collapsed head first. Their back has detached as thick wedges. Such motion indicates that the cliff foot had lost all resistance up to a depth behind the center of equilibrium of both towers. The towers fracture mid-way through their fall before hitting the ground. Then blocks bounced off the ground reaching further out. The final scree apron reaches a probable elevation of 25m (to be confirmed), with a regular slope and the outflow may be something of the order of 50 to 100m out to sea.
A lengthy stretch of an embankment on the River Fulohar collapsed in the Malda region of West Bengal over the weekend.
This has resulted in floods, submerging houses in several villages located along the river banks and displacing 30,000 residents.
The residents of affected villages accused the government of turning a blind eye to the calamity and their woes.
The embankment of the Fulohar, one of the tributaries of River Ganga, collapsed and the gushing waters engulfed more than 15 villages in the Harishchandrapur Block.
According to locals, the embankment collapsed in the early hours of Saturday.
The situation is worsening day by day as the water is rising continuously equivalent to two or three hands,” said Kabita Das, a local resident.
However, the district administration claimed of having taken steps to restore normalcy in the affected villages at the earliest.
Malda’s District Magistrate Kiran Kumar said: “Officials of our Engineering and Irrigation Department are working together. Wherever it is possible they are making temporary embankments. The officials are also engaged in rescue and relief operations. We have also urged both the state and federal governments to send a team of disaster management experts so as to speed up the rescue operations.”
While India has struggled to recover from devastating floods in Uttarakhand, other areas of the country are at risk as heavy monsoon rains inundate already burgeoning rivers, prompting authorities to evacuate tens of thousands of people, aid workers and government officials said.
June 30, 2013
A landslide along the Leh Nullah has endangered 20 houses which are on the verge of collapse, especially as further heavy rains are expected in the coming days.
The landslide occurred near the bridge connecting Chaklala Scheme-III and Gulistan Colony due to Saturday’s downpour, in which 67mm rain increased water levels at Leh Nullah up to eight feet. This led the loose earth on the banks to collapse into the nullah, making the foundations of the nearby houses visible.
The area falls under the administrative control of the Chaklala Cantonment Board (CCB), but no official visited the area even though the City District Government Rawalpindi (CDGR) had warned them of the danger.
Residents of the area near Leh Nullah are at risk if a retaining wall is not constructed immediately, especially as the majority of these are poor and have no alternate place to shift to.
According to these residents, the banks along the nullah were loosing earth everyday, and they feared the next rain spell would cause a number of houses to topple into the nullah.
Fareed Khan, a resident of the area, said the authority concerned did not construct a retaining wall along the Nullah even though a new bridge had been constructed two years ago.
He said residents of the area were facing problems due to land sliding, and children and the elderly were especially at risk.
Similarly, Malik Ramazan said, “We have no alternate accommodation, and it is the duty of the CCB to construct a retaining wall to save the lives of the people.”
He said houses along the Nullah would collapse if the government did not construct a retaining wall, adding that during the last rains, residents of the area had spent sleepless nights praying all the time that a flood did not occur. …
Leh locality prone to flood water
September 07, 2012
As many as 170 houses facing danger of collapse owing to landsliding following the roaring waves of Nullah Leh during monsoon season in Katchi Abadi of Murree Brewery.
There is no retaining wall constructed by the authorities concerned to stop the landsliding that had weakened the foundations of many houses, thus putting at stake the lives and properties of thousands of poor inhabitants of Kacthi Abadi, Murree Brewery…
The Kiev municipal government on Friday declared a state of emergency in the Ukrainian capital over landslides on the banks of Dnieper River.
“We have found areas, where there have been significant landslides of soil. We need to take immediate measures to prevent it,” Dmitry Novitsky, chief of the housing and municipal infrastructure department at Kiev City State Administration, told a meeting.
There were a total of 11 possible disaster sites in Kiev, he said, adding that anti-landslide measures were underway in these areas.
Emergency crews were working to erect retaining walls, install drainage systems and create surface runoffs, he said.
Kiev allocated around 1.25 million U.S. dollars from its municipal budget to prevent possible landslides.
About a half-mile stretch of Oceanside’s beach south of Tyson Street has virtually disappeared, the sand washed away by winter storms, uncovering fist-sized stones tossed onto The Strand during high tide.
“It’s at one of the lowest levels it’s been at in the past 20 to 30 years,” said Frank Quan, city harbor and beaches director.
Normally, sand dredged from the city harbor in April by the Army Corps of Engineers is spread over the beach, but this year the sand wasn’t deposited very far south of the pier because of grunion sightings, Quan said.
The sardine-sized fish leave the water to lay their eggs in the beach sand, and the Army Corps’ dredging permit doesn’t allow it to disturb the nesting fish, Quan said.
Over the summer, some sand will be pushed back onto the beach, but not nearly enough to replace what was lost over the winter, he said.
“We will get some sand washing up on the beach, but it’s not going to be a big beach,” Quan said.
In October, Oceanside had about 292,000 cubic feet of sand added to its beach as part of a $22.5 million regional beach replenishment project, but that sand went between Buccaneer Beach and just north of Hayes Street. It didn’t reach the portion of beach that abuts The Strand.
Longtime beach watcher John Daley said he’s worried that so much of the beach has been eroded that parts of The Strand could be at risk.
“The depletion every year has gotten where if we don’t have something happen to get more sand, it’s very likely that The Strand can be undermined,” Daley said. He said that happened about 30 years ago.
… Waves are splashing over the riprap along the 400 block of The Strand, and that’s where Daley said he saw stones scattered in the street, tossed up by the surf.
Quan said he has found sand from construction projects in Del Mar and Baja, Mexico, that could be brought to Oceanside to replenish the beach, but City Manager Peter Weiss said there’s no money in the budget to pay to get it here...