A cooling of water destroys corals off Japan

Unusually low water temperatures in Japan have destroyed some of the world's most northerly corals, an official from the Japanese Ministry of the Environment said Wednesday.

The ministry has been inspecting corals off the Pacific coast of Japan and found that a large portion had bleached, with 90 to 100% of each of the six areas observed being affected.

In four of these, the researchers reported from 85 to 95% of the whitened parts, said Yuto Takahashi, a guard of the marvelous natural spaces of the region attached to the ministry.

These damages seem the consequence of an unusual fall of the temperature of the water this year, in part due to a change of course of the Kuroshio current that conveys warm tropical waters to the north, he said.

"Very powerful cold winter fronts helped cool The gap made by the Kuroshio has also brought down the temperature of the sea "off Wakayama and other parts of the Pacific coast.

The mighty Kuroshio passing through the Pacific Northwest a, making an unusual deviation, brings up cold waters from the depths. Scientists have little knowledge of the reasons for these novelties of which they have observed six cases since 1965, the most recent last summer. In addition to their effect on temperature, they modify fishing zones and affect navigation, according to the Japanese Meteorological Agency.

The phenomenon recently observed in Japan "is different from the bleaching observed on the Great Barrier Reef or in Okinawa caused by a warming of the water, "says Takahashi.

The Japanese archipelago is home in its temperate zones, up to the Bay of Tokyo, the northernmost corals of the world, an aspect different from those further away from the poles. The magnificent reefs of an infinite variety of subtropical and tropical areas, such as the Great Barrier Reef off Australia, are whitening and dying as a result of global warming.

The regions closer to the poles, less hot but the climate is milder, could gradually accommodate the corals by the displacement generation after generation of their larvae.

The reefs, which cover less than 0.2% of the surface of the oceans, shelter 30% of the animal and vegetable species protecting them from predators and serving as their pantry. They contribute to the protection of the coasts, to the food of the men, to tourism.

Bouaké, second Ivorian city, deprived of water

Bouaké, the second largest city in Côte d'Ivoire with 1.5 million inhabitants, has been without water for a week, according to an AFP journalist.

The dam that supplies 70% of the water of the city (center) is dry and only a few districts are fed intermittently.

The city hospital, the two prisons and university campuses, they are powered by tanker trucks, waiting for the situation improves

"We have not had water for a week now, we are fighting for drinking water and cooking, it's a real ordeal," says Eliezer Konan, a computer scientist of Bouake.

The territorial director of hydraulics, Seydou Coulibaly, attributes these cuts to the unprecedented drought that crosses this zone of the country, but also to the sand quarries exploited in the region which diverted part of the water irrigating the dam. 19659002] Others attribute this drought to global warming.

Persistent water issues at Tokyo's future fish market

The city of Tokyo announced Friday that it had detected benzene levels still high compared to the recommended standard in the waters beneath the future fish market in the capital, which is to replace the well-known Tsukiji fish market. [19659002] The presence of benzene at a rate 130 times higher than the recommendations was measured in December in one of the inspection wells of the Toyosu site, told AFP Michio Yasuma, an official in charge of infrastructure coordination for the government of Tokyo

However, the market, due to open next October, is safe and contamination has not worsened, he added. "What needs to be controlled is the evolution in groundwater samples Does (the contamination) increase, decrease or remain the same.Our measurements show that the quality of this water remains globally stable"

The wells containing the most contaminated samples were located at a parking lot, according to official documents.

It is not intended to use this water for market activity, but the government of Tokyo regularly measures the presence of benzene and arsenic, as in the air.

"The data measuring the air quality at the surface, where the activity will be held , scientifically show that all is well, "added Mr. Yasuda.

The famous Tsukiji market must close in the fall to make way for transport and communication infrastructure in the optics of the Tokyo Olympics in 2020.

Located near the upscale neighborhood of Ginza, it has Every year, many tourists come to attend the tuna auctions. Created in 1935, it is the largest seafood and vegetable market in the world, but no longer meets the latest seismic standards and hygiene standards.

The new Toyosu market, located a few kilometers away on a site formerly occupied by a gas plant, offers conversely modern sanitary and refrigeration equipment.

However, this move was delayed, particularly after the discovery of soil contamination, since it was covered with concrete and other materials.

Make your wind turbine, water, drone: what you should not miss in the show of survivalism

Porte de la Villette, in Paris, was held from 23 to 25 March 2018, the very first exhibition of "survivalism". What is it about ? The organizers of the show define it as " a way of life based on the ability of an individual or entity to absorb shocks of any kind ". " Survivalism drives people to change their behavior and way of life with the primary objective of preparing for the onset of local, regional or global risk, and they are forced to invest in products and allowing one to prevent risks, and on the other hand to increase their self-sufficiency. "This show dedicated to this movement born in the United States (the organizers claim that there are 5 million survivalists on the American soil) was the first of its kind in France. There were vendors of hiking equipment, cutlers, distributors of heavy equipment (all-terrain vehicles, quads, motorhomes …), or sellers of greenhouses and manufacturers of hydroponics system. Here is a selection of the most interesting stands:

  • Make your own renewable energy devices

" The profile of the people who come to see us is very varied " says Thibaud Simon, co-manager of the center of CAP training (acronym for creators of positive autonomy). " We also have activists who no longer want to deal with EDF that owners of isolated homes who suffer from being off-grid, or people just want to reduce the bill related to their heating costs" . But all have in common the desire to be equipped with a local material able to provide energy to a home. The training center offers, with its Breton partner Aezeo, training sessions for individuals. These range from the energy diagnosis (to choose the right installation and size correctly according to its needs) to the manufacture of different equipment: boiler stove, solar thermal panel or water heater, and connect them correctly to their home installation. in compliance with current safety standards "specifies Thibaud Simon. At the end of their training, which gave them the necessary DIY skills (including plumbing and welding), the participants leave with the equipment they have built with their hands, and are able to install it at their home. home. This know-how allows them subsequently to ensure their own maintenance and upkeep. Since it can not be built (too complicated), the training center also offers workshops related to the installation of panels photovoltaic s.

In addition to using solar energy (photovoltaic panels or solar thermal) and wood (boiler stove …), it is also possible to equip a site of home-built wind turbines. This is what offers the company Valentinoise Ti'éole. The latter offers, on the same model, workshops to learn how to make small wind turbines with blades … wooden. The latter, whose profile is carefully worked, are bolted to a mobile structure. The model exhibited at the Salon of Survivalism used a car hub as the axis of rotation. The wind turbine, bolted to a metal mast, is extended by a saffron of wood and metal whose function is to keep it facing the wind. The electrical energy produced by the device is stored in a battery park.

Be aware that even if you make this equipment out of your hands, training and raw material have a price. Count 1.700 to 2.500 euros for a stove boiler (" the price of the material " explains Thibaud Simon). And for a wind turbine, it takes between 5,000 to 7,000 euros.

Imagine a small quadricopter able to fly even in case of heavy rains, and having the ability to evolve over a body of water without giving sweat cold to his pilot. And for good reason, the Diodon SP20 has the particularity of an inflatable chassis. Air under high pressure, retained by a very resistant fabric, gives the arms of drone a rigidity sufficient to ensure a stable flight. The interest of this flexible structure is multiple. It cash well shocks in case of hard landing: the arms fold but do not break (which is not necessarily the case of propellers). The machine can be easily placed on a rough surface without the risk of tipping over. But above all, she can stop on the surface of the water. Ideal to watch if zombies do not approach your cabin in the middle of the marsh.

Only downside: this device is intended primarily for the defense market, civil security or relief in the mountains, its price is prohibitive for the individual. Count more than 6,000 euros for a machine.

In conditions of survival, finding a source of drinking water is one of the priorities. However, as is often the case in natural disasters, access to a clean water source is often problematic. Fortunately, there are very effective portable filtration solutions that were demonstrated in the aisles of the show. The Aquapure stand offered visitors the opportunity to sample water drawn from an unhealthy pond.

This filter cartridge system is available as a "fixed" device (under a sink, in a water fountain …) or, more interestingly, nomadic version. A manual pump system then circulates the water through the cartridge into a gourd where it is stored, ready for consumption. Each cartridge can filter 900 liters of water before reaching saturation and require replacement. An ideal device, therefore, if you move in a hostile environment such as the jungle, where water, even unfit for consumption, is abundant.

Indonesia: swimming against the tide for drinking water

In a river in central Indonesia, Mama Hasria is swimming against the tide with about 200 jerry cans she pulls with a rope tied to her back to fetch water for the villagers, a daily job

Under a blazing sun not far from the equator, this 46-year-old woman has to travel four kilometers through the muddy waters of the Mandar River to reach the drinking water wells built along the upstream bank, in Celebes Province (Sulawesi)

 Villagers swim against the current in Tinambung, Indonesia, 21 March 2018 (AFP - YUSUF WAHIL)

Villagers swim against the tide in Tinambung, Indonesia, March 21, 2018 (AFP – YUSUF WAHIL)

There, she fills her jerrycans with water made potable by the surrounding soils that act as natural filter and purifier.

The work of Mrs. Hasria , paid about 500 rupees (3 euro cents) per jerrican, and the one other women allow some 5,800 families from fishing villages in Tinambung district to drink water

Thursday is World Water Day, a UN initiative that highlights this year's solutions "in the wild" to supply the population with drinking water

 Jerricans filled with water in Tinambung, Indonesia, on March 20, 2018 (AFP - YUSUF WAHIL)

Jerricans filled with water in Tinambung , Indonesia, March 20, 2018 (AFP – YUSUF WAHIL)

In Tinambung, water is a challenge. District residents have been complaining for years about limited access to drinking water.

"We need to look for water upstream so we can drink and cook." Village water can only be used to washing and washing, "Hasria points out.

 Water filtering on the banks of Mandar in Tinambung, Indonesia, March 20, 2018 (AFP - YUSUF WAHIL)

Water filtering on Mandar shores in Tinambung, Indonesia, March 20, 2018 (AFP – YUSUF WAHIL)

Other communities face similar challenges in Indonesia, an archipelago of Southeast Asia that faces many challenges like the Citarum, dubbed the most polluted river in the world.