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The Mekong Delta, covering about 40,000 square kilometers, is a low-level plain not more than three meters above sea level at any point and criss-crossed by a maze of canals and rivers. So much sediment is carried by the Mekong's various branches and tributaries that the delta advances sixty to eighty meters into the sea every year.
Originally, many thước of varying lengths were in use in Vietnam, each used for different purposes. According to Hoàng Phê (1988), [1] the traditional system of units had at least two thước of different lengths before 1890, [2] the thước ta (lit. "our ruler") or thước mộc ("wooden ruler"), equal to 0.425 metres (1 ft 4.7 in), and the thước đo vải ("ruler for measuring ...
Area; system unit code (alternative) QID symbol or abbrev. notes sample default conversion combinations SI: square kilometre: km2 Q712226: km 2: US spelling: square kilometer: 1.0 km 2 (0.39 sq mi) km2 sqmi; square hectometre: hm2 Q35852: hm 2: US spelling: square hectometer: 1.0 hm 2 (2.5 acres) square decametre: dam2 Q23931040: dam 2: US ...
1:100,000 maps are divided into squares representing 1 km 2, each square on the map being one square centimetre in area and representing 1 km 2 on the surface of the Earth. For 1:50,000 maps, the grid lines are 2 cm apart. Each square on the map is 2 cm by 2 cm (4 cm 2) and represents 1 km 2 on the surface of the Earth. For 1:25,000 maps, the ...
50,000 to 100,000 square kilometers • 30,000 to 50,000 square kilometers • 20,000 to 30,000 square kilometers • 10,000 to 20,000 square kilometers; 7,000 to 10,000 square kilometers • 5,000 to 7,000 square kilometers • 3,000 to 5,000 square kilometers • 1,000 to 3,000 square kilometers; 250 to 1,000 square kilometers • 0.1 to 250 ...
Vietnam, [e] [f] officially the Socialist Republic of Viet Nam, [g] is a country at the eastern edge of mainland Southeast Asia, with an area of about 331,000 square kilometres (128,000 sq mi) and a population of over 100 million, making it the world's fifteenth-most populous country.
Currently, Vietnam has two cities classified as special urban areas by the government: Hanoi and Ho Chi Minh City. To support the authorities of these two cities in fulfilling their functions as special urban areas, the government allows Hanoi and Ho Chi Minh City to benefit from certain specific financial and budgetary mechanisms.
By 1961, the area of the city had expanded to 584 km 2, and the population was 91,000 people. In 1978, National Assembly (Vietnam) decided to expand Hanoi for the second time to 2,136 km 2, with a population of 2.5 million people. [84] By 1991, the area of Hanoi continued to change, decreasing to 924 km 2 (357 sq mi), but the population was ...