Recently, after on-site inspections by experts, it was confirmed that the Sansha municipal government officially named the Ocean Blue Hole in the Yongle Atoll of the Paracel Islands "Sansha Yongle Blue Hole" (Sansha Yongle Blue Hole), which was confirmed to be the world's largest The deepest known ocean blue hole is located in the reef of Sansha City Yongle Atoll of Xisha Islands Jinqing Island and Shiyu, with a depth of 300 meters. 89 meters, the address coordinates are 16°31′30″ north latitude and 111°46′05″ east longitude. The picture shows an aerial photo of Longdong.
Ocean blue holes are a rare natural geographical phenomenon on the earth. Viewed from the sea surface, blue holes appear a different deep blue color from the surrounding waters, and form huge deep holes on the seabed. They are praised by scientists as "the last place where the earth has preserved the secrets of the universe for mankind." heritage". The previously proven depth rankings of ocean blue holes in the world are: Bahamas Long Island Deans Blue Hole (202 meters), Hadab Blue Hole in Egypt (130 meters), Belize Great Blue Hole in Honduras (123 meters), Malta Gogo The depth of Zuolan Cave (60 meters) and Xisha Yongle Blue Cave has set a new world record for ocean blue holes.
"Sansha Yongle Dragon Cave" has a long legend. Hainan fishermen claim that this is where the Dinghai Divine Needle is. Sun Wukong pulled out the Dinghai Divine Needle to make a wish-fulfilling golden hoop, leaving an unfathomable dragon cave. Some fishermen also say that the Dragon Cave is the eye of the South China Sea and contains hidden treasures. The treasure of the South China Sea.
From August 2015 to June 2016, the Xisha Track Research Institute used sonar side scan equipment, electronic counting plumbs, deep sea current meters, deep sea water quality analyzers, underwater robots , underwater photography equipment, etc. The equipment used a combination of scientific equipment detection and artificial diving observation and measurement to successfully determine the depth and basic shape of the blue hole. The expert team, headed by Meng Wei, an academician of the Chinese Academy of Engineering, determined that the exploration results were credible.
After investigation, the Yongle Blue Cave in Xisha is basically a vertical cave. The diameter of the blue cave is 130 meters, and the diameter of the cave bottom is about 36 meters. It has not been observed that the blue cave is connected to the outer sea, and there is no obvious flow of water in the cave. Through visual inspection, more than 20 kinds of fish and other marine life similar to those in the surrounding sea were found in the upper layer of the cave.
After review by Sansha City, Hainan Province and an expert group, the Sansha Coral Reef Conservation Research Institute announced that the proven depth of " Yongle Dragon Cave " in Xisha is 300.89 meters, exceeding the 202-meter ocean blue hole on Long Island in the Bahamas and becoming the world's oldest. The deepest known ocean blue hole.
The Sansha Municipal Government pointed out that the "Sansha Yongle Dragon Cave" has extremely high scientific research value and historical and cultural value, and is a true testimony of the Chinese government and people's long-term persistence in ecological and environmental protection.
column editor: Zhang Wu Text editor: Zha Rui Source of title picture: Visual China Picture editor: Zhu Xuan
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-