Hanoi Vietnam - The city lakes

 Previously, the area under present-day Hanoi Vietnam swamps, forests with many species of live predators, but over thousands of years, with the deposition of the river, plain appearance.
Forested swamp
According to the Research Committee of the ocean water level fluctuations in the world, 4,000 years ago, high above sea level 3.5 m above sea level today, but only 1,000 years later, the water level down below the level 3m sea current.
In "Tang accidental injury record," Pham Dinh Ho and Nguyen Court wrote: "Shanghai variable fill of mourning" - sea beach turned into green berries. Sea water does not keep a cartridge; land was raised, falling down. Sea retreat and alluvial silt rivers, bays Hanoi dried up: the band appeared and the marsh land.
There should be a crocodile swamp, negotiating, turtles, resolution. The Hoan Kiem Lake turtle is still precious. Crocodile river left at Red XIII century, that King Tran wrong Sailing South compose "Crocodile International Literature."
There should land plants grow in the jungle with wild beasts. Main use is patently copy: elephants of West Lake in the Ly forest, tigers hang around the forest area of ​​Le Dien Huu pagoda.
Excavations in Germany from, Korea Society (East England), Vinh Ninh, Van Dien (Thanh Tri) has found that the elephant, tiger fangs, antlers, teeth, 3000-4000 years old boar.
Yen Thai forest eagle is one of the "West Lake soup" Le; forest wood range between the peninsula of West Lake; ivory bamboo forest and river borders a forest strip again on Easter, the former also recorded.
And the ancient land named Bo, Gia Lam (multi-forest), Du Lin (forest berries da), Mai Lin (forest dream, and the Mai Dong, Bach Mai, Hoang Mai, Hong Mai, Tuong Mai), Van Lam, School of Forestry, East Thousand full lush forests.
The most obvious evidence of the period-swamp forest is the band Hanoi stock placement of peat underground.
Peat Dich Vong (Cau Giay) can place 4m thick, lies at an altitude of approximately sea level or less. Mud Hole Khe Coal Mine (Eastern England) extending to several kilometers. There are forests, wetlands plus earthquakes and storms, the new peat. Cover slightly more slowly to the ground meat. Vestiges of human life lies in this soil.
City lakes
Sharp geographical features of ancient Hanoi city lakes. Hanoi is the land beach land by the Red River alluvial deposition which should. But the accretion over thousands of thousands of years that have taken place not simply: du-lived natural form of the river delta - they change the line, and human intervention. Thuc Phan entrench Loa is flood prevention dykes.
According to ancient Chinese history, the early AD, at Phong Khe district (this includes land in Dong Anh district) had issue. To make the process of natural accretion partially blocked. The times of the Red River diversion to the lakes or horseshoe-shaped lagoon next strip of sand interspersed with the old river.
See a map of Hanoi ancient to mid-century, it found its territory is swampy, half water half land. Hanoi is planning to follow and adapt to the maximum extent possible the natural shape that rivers and lakes. Major part of the economic territory of the former alluvial sections, surrounded by the Red River in the north and east, To Lich river, the river Taurus to the west and south.
Accumulated coating which is also the dike road (La Thanh). Hanoi is both a river and lake water in daily use, the irrigation system and traditional communications, and geography are used as initial principles to direct the gathering villages, streets and defensive fortifications.
Red River, Christ is the main axis; West Lake, Hoan Kiem Lake is the central point, from which emanates "questions loom John Street, the road around the board.".