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Yan River
The Yan River () is a river in Shaanxi, China. The river flows from its source, the Xingzi River () in Jingbian County, in the prefecture-level city Yulin, Shaanxi, Yulin, and then flows through neighboring Yan'an, finally flowing into the larger Yellow River in Yanchang County, Yan'an. The Yan River flows a total length of , and has a total River Basin, basin area of . Geography The Yan River's source is Zhou Mountain (), in the Towns of China, town of Jingbian County, Yulin, Shaanxi, Yulin. The river then flows to the south into Yan'an, entering by passing through Ansai District. The Yan River continues its flow south to Baota District, the urban center of Yan'an. In Baota District, the river passes through , Qiaogou Subdistrict, , Liqu, , and finally, . The portion of the river which flows through Baota District totals , and has a River Basin, basin area of . From Baota District, the river flows east through Yanchang County, where it merges into the larger Yellow River. C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qiaogou Subdistrict
Qiaogou Subdistrict () is a subdistrict in Baota District, Yan'an, Shaanxi Province, China. The subdistrict spans an area of , and has a population of 69,345 as of 2010. History Qiaogou as an administrative unit dates back to 1972, when the Qiao'ergou People's Commune () was established. Qiao'ergou was changed to a township in 1984, when people's communes were abolished in China. In 1998, Qiao'ergou Township was upgraded to become a town, and its name was changed to Qiaogou (). In 2015, Qiaogou was upgraded from a town to a subdistrict. Geography Qiaogou Subdistrict is located in the central western portion of Baota District, near the urban core of Yan'an. The subdistrict is adjacent to Liqu to the east, Liulin to the south, and both Zaoyuan Subdistrict and to the northwest. The subdistrict has an average elevation of above sea level. The Yan River flows through the subdistrict. Administrative divisions Qiaogou Subdistrict has jurisdiction over 6 residential commu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bank (geography)
In geography, a bank is the land alongside a body of water. Different structures are referred to as ''banks'' in different fields of geography, as follows. In limnology (the study of inland waters), a stream bank or river bank is the terrain alongside the bed of a river, creek, or stream. The bank consists of the sides of the channel, between which the flow is confined. Stream banks are of particular interest in fluvial geography, which studies the processes associated with rivers and streams and the deposits and landforms created by them. Bankfull discharge is a discharge great enough to fill the channel and overtop the banks. The descriptive terms ''left bank'' and ''right bank'' refer to the perspective of an observer looking downstream; a well-known example of this being the sections of Paris as defined by the river Seine. The shoreline of ponds, swamps, estuaries, reservoirs, or lakes are also of interest in limnology and are sometimes referred to as banks. The grade ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Wei
Wei (), known in historiography as the Western Wei (), was an imperial dynasty of China that followed the disintegration of the Northern Wei. One of the Northern dynasties during the era of the Northern and Southern dynasties, it ruled the western part of northern China from 535 to 557. As with the Northern Wei dynasty that preceded it, the ruling family of the Western Wei were members of the Tuoba clan of the Xianbei. History After the Xianbei general Yuwen Tai killed the Northern Wei emperor Yuan Xiu, he installed Yuan Baoju as emperor of Western Wei while Yuwen Tai would remain as the virtual ruler. Although smaller than the Eastern Wei in territory and population, Western Wei was able to withstand the attacks from the eastern empire, most notably at the Battle of Shayuan in 537. Due to its better economical conditions, Western Wei was even able to conquer the whole western part of the Liang empire in the south and occupied the territory of modern Sichuan. In 557 Yuwen Tai' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern And Southern Dynasties
The Northern and Southern dynasties () was a period of political division in the history of China that lasted from 420 to 589, following the tumultuous era of the Sixteen Kingdoms and the Eastern Jin dynasty. It is sometimes considered as the latter part of a longer period known as the Six Dynasties (220–589). Albeit an age of civil war and political chaos, it was also a time of flourishing arts and culture, advancement in technology, and the spread of Mahayana Buddhism and Daoism. The period saw large-scale migration of the Han people to the lands south of the Yangtze. The period came to an end with the unification of all of China proper by Emperor Wen of the Sui dynasty. During this period, the process of sinicization accelerated among the non-Han ethnicities in the north and among the indigenous peoples in the south. This process was also accompanied by the increasing popularity of Buddhism ( introduced into China in the 1st century) in both northern and southern Chin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Han
The Han dynasty (, ; ) was an Dynasties in Chinese history, imperial dynasty of China (202 BC – 9 AD, 25–220 AD), established by Emperor Gaozu of Han, Liu Bang (Emperor Gao) and ruled by the House of Liu. The dynasty was preceded by the short-lived Qin dynasty (221–207 BC) and a warring interregnum known as the ChuHan contention (206–202 BC), and it was succeeded by the Three Kingdoms period (220–280 AD). The dynasty was briefly interrupted by the Xin dynasty (9–23 AD) established by usurping regent Wang Mang, and is thus separated into two periods—the #Western Han, Western Han (202 BC – 9 AD) and the #Eastern Han, Eastern Han (25–220 AD). Spanning over four centuries, the Han dynasty is considered a golden age (metaphor), golden age in Chinese history, and it has influenced the identity of the History of China, Chinese civilization ever since. Modern China's majority ethnic group refers to themselves as the "Han Chinese, Han people", the Sinitic langu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warring States Period
The Warring States period () was an era in History of China#Ancient China, ancient Chinese history characterized by warfare, as well as bureaucratic and military reforms and consolidation. It followed the Spring and Autumn period and concluded with the Qin's wars of unification, Qin wars of conquest that saw the annexation of all other contender states, which ultimately led to the Qin (state), Qin state's victory in 221 BC as the first unified History of China#Imperial China, Chinese empire, known as the Qin dynasty. Although different scholars point toward different dates ranging from 481 BC to 403 BC as the true beginning of the Warring States, Sima Qian's choice of 475 BC is the most often cited. The Warring States era also overlaps with the second half of the Eastern Zhou Period, Eastern Zhou dynasty, though the Chinese sovereign, known as the king of Zhou, ruled merely as a figurehead and served as a backdrop against the machinations of the warring states. The "Warring St ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forest
A forest is an area of land dominated by trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' Food and Agriculture Organization (FAO) defines a forest as, "Land spanning more than 0.5 hectares with trees higher than 5 meters and a canopy cover of more than 10 percent, or trees able to reach these thresholds ''in situ''. It does not include land that is predominantly under agricultural or urban use." Using this definition, '' Global Forest Resources Assessment 2020'' (FRA 2020) found that forests covered , or approximately 31 percent of the world's land area in 2020. Forests are the predominant terrestrial ecosystem of Earth, and are found around the globe. More than half of the world's forests are found in only five countries (Brazil, Canada, China, Russia, and the United States). The largest share of forests (45 percent) are in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sand
Sand is a granular material composed of finely divided mineral particles. Sand has various compositions but is defined by its grain size. Sand grains are smaller than gravel and coarser than silt. Sand can also refer to a textural class of soil or soil type; i.e., a soil containing more than 85 percent sand-sized particles by mass. The composition of sand varies, depending on the local rock sources and conditions, but the most common constituent of sand in inland continental settings and non-tropical coastal settings is silica (silicon dioxide, or SiO2), usually in the form of quartz. Calcium carbonate is the second most common type of sand, for example, aragonite, which has mostly been created, over the past 500million years, by various forms of life, like coral and shellfish. For example, it is the primary form of sand apparent in areas where reefs have dominated the ecosystem for millions of years like the Caribbean. Somewhat more rarely, sand may be composed of calciu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loess Plateau
The Chinese Loess Plateau, or simply the Loess Plateau, is a plateau in north-central China formed of loess, a clastic silt-like sediment formed by the accumulation of wind-blown dust. It is located southeast of the Gobi Desert and is surrounded by the Yellow River. It includes parts of the Chinese provinces of Gansu, Shaanxi and Shanxi. The depositional setting of the Chinese Loess Plateau was shaped by the tectonic movement in the Neogene period, after which strong southeast winds caused by the East Asian Monsoon transported sediment to the plateau during the Quaternary period. The three main morphological types in the Loess Plateau are loess platforms, ridges and hills, formed by the deposition and erosion of loess. Most of the loess comes from the Gobi Desert and other nearby deserts. The sediments were transported to the Loess Plateau during interglacial periods by southeasterly prevailing winds and winter monsoon winds. After the deposition of sediments on the plateau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dry Season
The dry season is a yearly period of low rainfall, especially in the tropics. The weather in the tropics is dominated by the tropical rain belt, which moves from the northern to the southern tropics and back over the course of the year. The temperate counterpart to the tropical dry season is summer or winter. Rain belt The tropical rain belt lies in the southern hemisphere roughly from October to March; during that time the northern tropics have a dry season with sparser precipitation, and days are typically sunny throughout. From April to September, the rain belt lies in the northern hemisphere, and the southern tropics have their dry season. Under the Köppen climate classification, for tropical climates, a dry season month is defined as a month when average precipitation is below . The rain belt reaches roughly as far north as the Tropic of Cancer and as far south as the Tropic of Capricorn. Near these latitudes, there is one wet season and one dry season annually. At the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wet Season
The wet season (sometimes called the Rainy season) is the time of year when most of a region's average annual rainfall occurs. It is the time of year where the majority of a country's or region's annual precipitation occurs. Generally, the season lasts at least a month. The term ''green season'' is also sometimes used as a euphemism by tourist authorities. Areas with wet seasons are dispersed across portions of the tropics and subtropics. Under the Köppen climate classification, for tropical climates, a wet season month is defined as a month where average precipitation is or more. In contrast to areas with savanna climates and monsoon regimes, Mediterranean climates have wet winters and dry summers. Dry and rainy months are characteristic of tropical seasonal forests: in contrast to tropical rainforests, which do not have dry or wet seasons, since their rainfall is equally distributed throughout the year.Elisabeth M. Benders-Hyde (2003)World Climates.Blue Planet Biomes. Retr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
