The Dragon Hole, otherwise called the Yongle Blue Hole (Conventional Chinese: 永樂藍洞), named after the third Ming head Yongle, was the world’s most profound known blue opening at a profundity of 300.89 meters (987.2 ft). until it was outperformed by the Cap Ja’ in 2024. It is situated around 9 kilometers (5.6 mi) north of Drummond Island in the Paracel Islands.
Blue hole make an unmistakable dark blue tone when seen from a higher place and are normally a couple dozen meters down.
| Place | Paracel Islands |
| Coordinates | N16.5249373, E111.7680205 (N16°31.55′. E111°46.1′) |
| Depth | 300.89 metres |
Mythical serpent Opening is roughly 100 meters (330 ft) more profound than Dignitary’s Blue Opening in the Bahamas. There are a few freshwater sinkholes ashore that are more profound than Mythical serpent Opening. These remember Zacatón for Mexico (335 meters (1,099 ft)), Pozzo del Merro in Italy (392 meters (1,286 ft)) and Hanice Pit in the Czech Republic (404 meters (1,325 ft)).
The Sansha Yongle Blue Hole was framed at about a similar time as the encompassing South China Ocean islands. Blue Hole can shape in various ways. The most widely recognized way is by liquefying of ice developments at the surface, bringing about enormous despondencies where there was once ice. Blue Hole can likewise shape following disturbances in the ocean bottom surface because of structural movements, bringing about the aggregation of sand and flotsam and jetsam (Emery, 1962). The Blue Hole in Belize was once a dry land cave; its flow structure is the consequence of rising ocean levels and ensuing breakdown of the rooftop.
Search
The specific area of Winged serpent Opening is N16°31.55′. E111°46.1′.
Geologically, the opening is tracked down in the Eastern Atoll close to the Paracel Islands in the South China Ocean.
After the disclosure by neighborhood anglers, the primary exploration techniques included utilizing a Video Beam Ace 4 submerged robot, as indicated by the Xinhua news office. The robot viewed the opening as 987 feet (301 meters) profound and 426 feet (130 meters) wide in certain spots. In excess of 20 new types of marine life were found during the underlying investigation endeavors.
Other data acquired from the underlying investigation was an unmistakable distinction in synthetic creation between water sections. Oxygen levels drop at the 300-foot mark, making it more hard for life to get by. This data has prompted theory about what can be gained from research at Winged serpent Opening.
Research
Because of the encompassing geographical difficulties, new examination strategies were made to concentrate on the opening. The encompassing coral is just at a typical profundity of 0.5-0.8 meters, so any bigger examination vessels are deterred from moving toward the kickoff of Winged serpent Opening.
Another technique was to utilize a boat with a level base that permitted it to rest over the opening entry, regardless of whether there was shallow water around it. This vessel was utilized as an organizing stage for gathering information, as well as to send a remotely worked vehicle (ROV). Because of the utilization of an “submerged coordinated route framework” the ROV had the option to get constant orders, permitting control of development and perception.
The gadget transporter or level lined vessel filled in as a fundamental device for moving examples and exploration gear to the site without harming the encompassing rocks and climate. The general size of the exploration vessel was 25×18 meters.
The general size of the ROV or gadget was 3.0×1.7×1.7 meters. The particular one utilized was a “FCV 2000D Expert Grade ROV”
Blue Hole are truly important to researchers comparable to investigate on environmental change, marine biology, as well as geochemistry and variety among water segments. Urging the examination directed at Dragon Hole, a lot of information was gathered.
Tide Estimation
Tide estimating stations were briefly introduced around Mythical beast Hole and on the exploration vessel. This estimation method accomplished an exactness of inside 3 cm. reference required.
Estimation of Land
The utilization of the ROV made it conceivable to get a three-layered geography of the whole blue opening. The ROV, outfitted with a multibeam gadget, filtered the whole submerged framework. Joining this with computerized outputs of the opening’s surface, a three-layered model was made.
Hydrochemical Properties
The Sansha Yongle Blue Opening, being the most profound of its sort, took into consideration the biggest information assortment surface accessible for this particular exploration. Through the information gathered, it turned out to be obvious to the specialists that two thermoclines could be recognized inside the water segment. The principal progress between warm blended water and cold stale water happens somewhere in the range of 13 and 20 meters. The second thermocline happens roughly 70-150 meters down in the water segment. Testing water from various profundities and layers takes into consideration the assortment of data about rock dregs, minerals, microorganisms, organic entities, and substance research. The investigation of this data can be utilized to find significant information about the historical backdrop of the world from the hour of the arrangement of the Mythical serpent Hole.
