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Hangu District, Tianjin
Hangu District (), is a former district in eastern Tianjin, China; now part of Binhai New Area. It serves as a gateway towards Liaoning, Jilin and Heilongjiang provinces. Geography Hangu District is 50 kilometers away from Tangshan in Hebei Province to the east, away from downtown in the west, away from Tianjin New Port and TEDA and away from Dagang District, notable for its petroleum production. Bohai Bay is located to the south and connects with Ninghe County in the north. The Jiyun River divides the north and south of the district for a length of and covers a watershed of . It covers an area of , including of city zones. Its current bottomland is , while the surface area is . The river vents 720 million m3 of water to the sea annually. The district has two reservoirs, the capacity of Yingcheng reservoir is 30 million m3, while that of Gaozhuang reservoir is 4.5 million m3. Climate Hangu District has a humid continental climate (Köppen climate classification ''Dwa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
District (China)
The term ''district'', in the context of China, is used to refer to several unrelated political divisions in both ancient and modern China. In the modern context, district ( zh, s=区, labels=no), formally city-governed district, city-controlled district, or municipal district ( zh, s=市辖区, links=no, labels=no), are subdivisions of a Direct-administered municipality, municipality or a prefecture-level city. The rank of a district derives from the rank of its city. Districts of a municipality are prefectures of China, prefecture-level; districts of a sub-provincial division, sub-provincial city are sub-prefecture-level; and districts of a prefecture-level city are counties of China, county-level. The term was also formerly used to refer to obsolete District (China)#County-controlled districts (obsolete), county-controlled districts (also known as district public office). However, if the word ''district'' is encountered in the context of ancient history of China, Chinese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ninghe County
Ninghe District ( zh, s=宁河区, t=寧河區, p=Nínghé Qū, l=Tranquil River), formerly Ninghe County, is a district of the municipality of Tianjin, People's Republic of China, located in the rural northeast part of the municipality. Inside this district, there are three enclaves. Two belongs to neighbour Tangshan: Lutai Economic Development Zone and Hangu Administration Zone. The last one, the , is administered by Beijing Municipal Administration of Prisons Administrative divisions There are 11 towns and 3 townships A township is a form of human settlement or administrative subdivision. Its exact definition varies among countries. Although the term is occasionally associated with an urban area, this tends to be an exception to the rule. In Australia, Canad ... in the district: Climate References Districts of Tianjin {{Tianjin-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salt Production
In common usage, salt is a mineral composed primarily of sodium chloride (NaCl). When used in food, especially in granulated form, it is more formally called table salt. In the form of a natural crystalline mineral, salt is also known as rock salt or halite. Salt is essential for life in general (being the source of the essential Mineral (nutrient), dietary minerals Sodium#Biological role, sodium and Chlorine#Biological role, chlorine), and saltiness is one of the Basic tastes, basic human tastes. Salt is one of the oldest and most ubiquitous food seasonings, and is known to uniformly improve the taste perception of food. Salting (food), Salting, brining, and pickling are ancient and important methods of food preservation. Some of the earliest evidence of salt processing dates to around 6000 BC, when people living in the area of present-day Romania boiled spring (hydrology), spring water to extract salts; a Salt in Chinese History#Ancient China, Qin and Han dynasties, salt w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Primary Sector Of The Economy
The primary sector of the economy includes any industry involved in the extraction and production of raw materials, such as farming, logging, fishing, forestry and mining. The primary sector tends to make up a larger portion of the economy in developing countries than it does in developed countries. For example, in 2018, agriculture, forestry, and fishing comprised more than 15% of GDP in sub-Saharan Africa but less than 1% of GDP in North America. In developed countries the primary sector has become more technologically advanced, enabling for example the mechanization of farming, as compared with lower-tech methods in poorer countries. More developed economies may invest additional capital in primary means of production: for example, in the United States corn belt, combine harvesters pick the corn, and sprayers spray large amounts of insecticides, herbicides and fungicide Fungicides are pesticides used to kill parasitic fungi or their spores. Fungi can cause serious d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synthetic Fiber
Synthetic fibers or synthetic fibres (in British English; see spelling differences) are fibers made by humans through chemical synthesis, as opposed to natural fibers that are directly derived from living organisms, such as plants like cotton or fur from animals. They are the result of extensive research by scientists to replicate naturally occurring animal and plant fibers. In general, synthetic fibers are created by extruding fiber-forming materials through spinnerets, forming a fiber. These are called synthetic or artificial fibers. The word polymer comes from a Greek prefix "poly" which means "many" and suffix "mer" which means "single units". (Note: each single unit of a polymer is called a monomer). The first synthetic fibres Nylon was the first commercially successful synthetic thermoplastic polymer. DuPont began its research project in 1927. The first nylon, nylon 66, was synthesized on February 28, 1935, by Wallace Hume Carothers at DuPont's research facili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zoning
In urban planning, zoning is a method in which a municipality or other tier of government divides land into land-use "zones", each of which has a set of regulations for new development that differs from other zones. Zones may be defined for a single use (e.g. residential, industrial), they may combine several compatible activities by use, or in the case of form-based zoning, the differing regulations may govern the density, size and shape of allowed buildings whatever their use. The planning rules for each zone determine whether planning permission for a given development may be granted. Zoning may specify a variety of outright and conditional uses of land. It may indicate the size and dimensions of lots that land may be subdivided into, or the form and scale of buildings. These guidelines are set in order to guide urban growth and development. Zoning is the most common regulatory urban planning method used by local governments in developed countries. Exceptions include th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocean Fisheries
A fishery is an area with an associated fish or aquatic population which is harvested for its commercial value. Fisheries can be wild or farmed. Most of the world's wild fisheries are in the ocean. This article is an overview of ocean fisheries. Statistics Oceans occupy 71 percent of the Earth's surface. They are divided into five major oceans, which in decreasing order of size are: the Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern Ocean, and Arctic Ocean. Over 70 percent of the world catch from the sea comes from the Pacific Ocean. Pacific Ocean Atlantic Ocean Indian Ocean Southern Ocean Arctic Ocean See also * Wild fisheries * World fish production * Fishing by country * List of harvested aquatic animals by weight * Population dynamics of fisheries * Krill fishery * Crab fisheries Crab fisheries are fisheries which capture or Fish farming, farm crabs. True crabs make up 20% of all crustaceans caught and farmed worldwide, with about 1.4 million to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agriculture
Agriculture encompasses crop and livestock production, aquaculture, and forestry for food and non-food products. Agriculture was a key factor in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in the cities. While humans started gathering grains at least 105,000 years ago, nascent farmers only began planting them around 11,500 years ago. Sheep, goats, pigs, and cattle were domesticated around 10,000 years ago. Plants were independently cultivated in at least 11 regions of the world. In the 20th century, industrial agriculture based on large-scale monocultures came to dominate agricultural output. , small farms produce about one-third of the world's food, but large farms are prevalent. The largest 1% of farms in the world are greater than and operate more than 70% of the world's farmland. Nearly 40% of agricultural land is found on farms larger than . However, five of every six farm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dual Economy
A dual economy is the existence of two separate economic sectors within one country, divided by different levels of development, technology, and different patterns of demand. The concept was originally created by Julius Herman Boeke to describe the coexistence of modern and traditional economic sectors in a colonial economy. Dual economies are common in less developed countries, where one sector is geared towards local needs and another to the global export market. Dual economies may exist within the same sector, for example a modern plantation or other commercial agricultural entity operating in the midst of traditional cropping systems. Sir Arthur Lewis used the concept of a dualistic economy as the basis of his labour supply theory of rural-urban migration. Lewis distinguished between a rural low-income subsistence sector with surplus population, and an expanding urban capitalist sector (see Dual-sector model). The urban economy absorbed labor from rural areas (holding down ur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China Meteorological Administration
The China Meteorological Administration (CMA) is the national weather service of the People's Republic of China. The institution is located in Beijing. History The agency was originally established in December 1949 as the Central Military Commission Meteorological Bureau. It replaced the Central Weather Bureau formed in 1941. In 1994, the CMA was transformed from a subordinate governmental body into one of the public service agencies under the State Council.CMA.gov history Meteorological bureaus are established in 31 provinces, autonomous regions and [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Köppen Climate Classification
The Köppen climate classification divides Earth climates into five main climate groups, with each group being divided based on patterns of seasonal precipitation and temperature. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (temperate), ''D'' (continental), and ''E'' (polar). Each group and subgroup is represented by a letter. All climates are assigned a main group (the first letter). All climates except for those in the ''E'' group are assigned a seasonal precipitation subgroup (the second letter). For example, ''Af'' indicates a tropical rainforest climate. The system assigns a temperature subgroup for all groups other than those in the ''A'' group, indicated by the third letter for climates in ''B'', ''C'', ''D'', and the second letter for climates in ''E''. Other examples include: ''Cfb'' indicating an oceanic climate with warm summers as indicated by the ending ''b.'', while ''Dwb'' indicates a semi-Monsoon continental climate, monsoonal continental climate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humid Continental Climate
A humid continental climate is a climatic region defined by Russo-German climatologist Wladimir Köppen in 1900, typified by four distinct seasons and large seasonal temperature differences, with warm to hot (and often humid) summers, and cold (sometimes severely cold in the northern areas) and snowy winters. Precipitation is usually distributed throughout the year, but often these regions do have dry seasons. The definition of this climate in terms of temperature is as follows: the mean temperature of the coldest month must be below or depending on the isotherm, and there must be at least four months whose mean temperatures are at or above . In addition, the location in question must not be semi-arid or arid. The cooler ''Dfb'', ''Dwb'', and ''Dsb'' subtypes are also known as hemiboreal climates. Although amount of snowfall is not a factor used in defining the humid continental climate, snow during the winter in this type of climate is almost a guarantee, either intermitte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
