Explanatory Notes on Main Statistical Indicators
Territory refers to
territorial land, sea and air space under the administration of the People’s
Republic of
Climate refers to the natural environmental status formed by the long-term exchange of energy and mass between the earth and the atmosphere, and is the result of interaction of many factors. Climate is both one of the environment factors and also the important resources for living and production activities of the human being. The average values across several years of meteorological factors such as temperature, rainfall and humidity are used as important parameters to describe the climate of a region, while the average values (or total values) of a given year or month of meteorological factors reflect the key characteristics of climate for that period of time.
Natural Resources refer to material resources that could be obtained from the nature by human being and used for production and living. Natural resources in general can be classified as renewable resources and non-renewable resources. Renewable resources refer to resources that could be renewed and recycled during a relatively short period of time, including land resource, water resource, climate resource, biology resource and marine resource. Non-renewable resources include resources that could not be renewed, such as minerals and geothermal resource.
Area of Cultivated Land refers to area of land reclaimed for the regular cultivation of various farm crops, including crop-cover land, fallow, newly reclaimed land and land laid idle for less than 3 years.
Area of Afforested Land refers to area for land for trees bamboo, bushes and mangrove, including forest-covered land, bush-covered land, sparse forest land, land planned for afforestation and nurseries of young trees.
Area of Grassland refers to area of grassland, grass-slopes and grass-covered hills with a vegetation-covering rate of over 5% that are used for animal husbandry or harvesting of grass. It includes natural, cultivated and improved grassland areas.
Forest Area refers to the area of trees and bamboo grow with canopy density above 0.2, the area of shrubby tree according to regulations of the government, the area of forest land inside farm land and the area of trees planted by the side of villages, farm houses and along roads and rivers.
Stock Volume of Forest refers to total stock volume of wood growing in forest area, which shows the total size and level of forest resources of a country or a region. It is also an important indicator illustrating the richness of forest resource and the status of forest ecological environment.
|
|
Area of Afforested
Land |
×100% |
|
Area of |
Total Standing Stock Volume refers to the total stock volume of trees growing in land, including trees in forest, trees in sparse forest, scattered trees and trees planted by the side of villages, farm houses and along roads and rivers.
Water Resource Water exists in the nature in solid, liquid and gaseous states, is distributed in the ocean, land (including earth) and air, and constitutes the water resource through the circulation of water. Water resource includes the surface water and underground water that is controlled by the human being for irrigation, power-generation, water supply, navigation and cultivation. It also includes rivers, lakes, wells, springs, tides, gulf and water area for cultivation. Water resource as an important natural resource is indispensable for the development of the national economy.
Runoff refers to the water gathered at the way out of the cross section of drainage area either from the surface or underground after deducting the wastage of the precipitation on the land. Runoff can be divided into surface runoff, underground runoff and within soil runoff. Surface runoff refers to water flowing to the rivers, lakes, swamps, and seas on the surface of the earth. Underground runoff refers to water flow to rivers, lakes, swamps, and seas through the water-bearing stratum of confined layer or unconfined layer.
Volume of Runoff refers to the total volume of water running through a certain cross section of a river during a certain period of time, reflecting the water resource condition in a country or a region. The formula for calculating volume of runoff is as follows:
Runoff =Precipitation-Evaporation
Drainage Area Each river has its own main stream and branches to form the water system of the river. Each river has its own catchment’s area, which is also called as the drainage area of the river.
Out-flowing Rivers refer to rivers directly or indirectly flowing into the sea. The area providing water to the out-flowing rivers is called as out-flowing area.
Inland Rivers refer to rivers in inland dry areas that die away in desert on the way or infuse into inland lakes. The area providing water to the inland rivers is called as inland area.
Mineral Resources refer to useful minerals that can be used for industrial or agricultural purposes enriched in lithosphere or on earth due to the geological process.
Ensured Mineral Reserves refer to the actual mineral reserves, which equal to the proven mineral reserves (including industrial reserves and prospective reserves) minus extracted parts and underground losses. This indicator shows the current condition of the mineral resources of a Country．
Temperature refers to
the air temperature.
Monthly average temperature is the summation of average daily temperature of one month divided by the actual days of that particular month.
Annual average temperature is the summation of monthly average of a year divided by 12 months.
Volume of Precipitation refers to the deepness of liquid state or solid state (thawed) water falling from the sky to the ground that has not been evaporated, infiltrated or run off. The calculation method is as follows:
Monthly precipitation is the summation of daily precipitation of a month.
Annual precipitation is the summation of 12 months precipitation of a year.
Sunshine Hours refer to the actual hours of sun irradiating the earth. The calculation method is the same as that of the precipitation.
Total Water Resources refers to total volume of water resources measured as run-off for surface water from rainfall and recharge for groundwater in a given area, excluding transit water.
Surface Water Resources refers to total renewable resources which exist in rivers, lakes, glaciers and other collectors from rainfall and are measured as run-off of rivers.
Groundwater Resources refers to replenishment of aquifers with rainfall and surface water.
Duplicated Measurement between Surface Water and Groundwater refers to mutual exchange between surface water and groundwater, i.e. run-off of rivers includes some depletion into groundwater while groundwater includes some replenishment from surface water.
Water Supply refers to gross water supply by supply systems from sources to consumers, including losses during distribution.
Surface Water Supply refers to withdrawals by surface water supply system, broken down with storage, flow, pumping and transfer. Supply from storage projects includes withdrawals from reservoirs; supply from flow includes withdrawals from rivers and lakes with natural flows no matter if there are locks or not; supply from pumping projects includes withdrawals from rivers or lakes with pumping stations; and supply from transfer refers to water supplies transferred from first-level regions of water resources or independent river drainage areas to others, and should not be covered under supplies of storage, flow and pumping.
Groundwater Supply refers to withdrawals from supplying wells, broken down with shallow layer freshwater, deep layer freshwater and slightly brackish water. Groundwater supply for urban areas includes water mining by both waterworks and own wells of enterprises.
Other Water Supply Sources include supplies by waste-water treatment, rain collection, seawater desalinization and other water projects.
Water Use refers to gross water use distributed to users, including loss during transportation, broken down into use by agriculture, industry, living consumption and ecological protection.
Water Use by Agriculture includes uses of water by irrigation of farming fields and by forestry, animal husbandry and fishing. Water use by forestry, animal husbandry and fishery includes irrigation of forestry and orchards, irrigation of grassland and replenishment of fishing farms.
Water Use by Industry refers to new withdrawals of water, excluding reuse of water within enterprises.
Water Use by Living Consumption includes use of water for living consumption in both urban and rural areas. Urban water use by living consumption is composed of household use and public use (including services, commerce, restaurants, cargo transportation, posts, telecommunications and construction). Rural water use by living consumption includes both households and animals.
Water Use by Ecological Protection includes replenishment of rivers and lakes and use for urban environment.
Waste Water Discharged by Industry refers to the volume of waste water discharged by industrial enterprises through all their outlets, including waste water from production process, directly cooled water, groundwater from mining wells which does not meet discharge standards and sewage from households mixed with waste water produced by industrial activities, but excluding indirectly cooled water discharged (It should be included if the discharge is not separated from waste water).
Industrial Waste Water Meeting Discharge Standards refers to volume of industrial waste water discharge which, with or without treatment, reaches national or local standards with regard to all pollutants.
Ratio of Industrial Waste Water Meeting Discharge Standards refers to percentage of industrial waste water meeting discharge standards over total industrial waste water discharge. It is calculated as:
|
Ratio of industrial
waste water |
= |
industrial waste
water |
|
total industrial waste |
Chemical Oxygen Demand (COD) refers to the amount of oxygen required when chemical oxidants are used to oxidize organic pollutants in water. A higher value of COD corresponds to more serious pollution by organic pollutants.
Industrial Waste Air Emission refers to discharge into atmosphere of waste air containing pollutants generated from fuel burning and production process in enterprises within a given period of time. It is converted into standard (273K, 101325Pa) with the following formula:
Emission=emission from fuel burning+ emission through production process
Industrial Soot Emission refers to the volume of soot in smoke emitted in the process of fuel burning in the premises of enterprises.
Industrial Dust Emission refers to volume of dust emitted by production process of enterprises and suspended in the air for a given period of time, including dust from refractory material of iron and steel works, dust from coke-screening systems and sintering machines of coke plants, dust from lime kilns and dust from cement production in building material enterprises, but excluding soot and dust emitted from power plants.
Industrial Solid Wastes Produced refers to total volume of solid, semi-solid and high concentration liquid residues produced by industrial enterprises from production process in a given period of time, including hazardous wastes, slag, coal ash, gangue, tailings, radioactive residues and other wastes, but excluding stones stripped or dug out in mining - gangue and acid or alkaline stones not included (a stone is acid or alkaline according to the pH value of the water being below 4 or above 10.5 when the stone is in, or soaked by water).
Industrial Solid Wastes Utilized refers to volume of solid wastes from which useful materials can be extracted or which can be converted into usable resources, energy or other materials by means of reclamation, processing, recycling and exchange (including utilizing in the year the stocks of industrial solid wastes of the previous year). Examples of such utilizations include fertilizers, building materials and road materials. The information shall be collected by the producing units of the wastes.
Rate of Utilization of Industrial Solid Wastes refers to the percentage of industrial solid wastes utilized over industrial solid wastes produced (including stocks of the previous years). It is calculated as:
|
Rate of utilization
of |
= |
volume of industrial |
×100% |
|
industrial solid wastes
produced + |
Stock of Industrial Solid Wastes refers to the volume of solid wastes placed in special facilities or special sites for purposes of utilization or disposal. The sites or facilities should take measures against dispersion, loss, seepage, and air and water contamination.
Industrial Solid Wastes Disposed refers to the quantity of industrial solid wastes which are burnt or placed ultimately in the sites meeting the requirements for environmental protection and not salvaged or recycled (including disposition in the year of those wastes of previous years). The disposition includes landfill (Safe landfills should be conducted for hazardous wastes), incineration, containment spaces, deep underground disposal, backfill in mining pits and disposal at sea.
Industrial Solid Wastes Discharged refers to the volume of industrial solid wastes discharged by producing enterprises to disposal facilities or to other sites. The wastes exclude stones stripped or dug from mining (gangue and acid or alkaline waste stones not included).
Consumption Wastes Transported refers to volume of consumption wastes collected and transported to disposal factories or sites. Consumption wastes are solid wastes produced from urban households or from service activities for urban households, and solid wastes regarded by laws and regulations as urban consumption wastes, including those from households, commercial activities, markets, cleaning of streets, public sites, offices, schools, factories, mining units and other sources.
Ratio of Consumption Wastes Treated refers to consumption wastes treated over that produced. In practical statistics, as it is difficult to estimate, the volume of consumption wastes produced is replaced with that transported. It is calculated as:
|
Ratio of consumption |
= |
consumption |
×100% |
|
consumption |
Land for Agriculture Use refers to land directly used for agriculture production, including land for cultivation, gardening, forests, herbage and other agriculture activities.
Area of Man-made Forests refer to the area of stable growing forests, planted manually or by airplanes, with a survival rate of 80% or higher of the designed number of trees per hectare, or with a canopy density of or above 0.20 after 3-5 years of manual planting or 5-7 years of airplane planting.
Total
Area of Afforestation refers to the total area of land suitable
for afforestation, including barren hills, idle land,
sand dunes, “grain for green” land, on which acres of arbores or bushes are
planted through manual planting, airplane planting, plant seedlings, etc. in
accordance with the required density standards of the Technical Procedures of Afforestation, and with a survival rate of over 85% in line
with the Implementing Rules of the Forest Law of the People’s Republic of China
(or a survival rate of 75% in areas with less that
By-product Forests refer to forests that mainly produce fruits, nuts, edible oil, beverages, indigents, raw materials and medicine materials. By-product forests are planted to harvest the fruits, leaves, bark or liquid of trees, and consume them as food or raw materials for the manufacturing industry, such as tea-oil trees, tung oil trees, walnut trees, camphor trees, tea bushes, mulberry trees, fruit trees, etc.
Protection Forests refer to forests, trees and bushes planted mainly for protection or preservation purpose, including water resource conservation forests, water and soil conservation forests, windbreak and dune-fixing forests, farmland and pasture protection forests, riverside protection forests, roadside protection forests, etc.
Fuel Forests refer to forests planted mainly for fuels.
Project
on Preservation of Natural Forests is the Number One ecological project in
Projects on Converting Cultivated Land to Forests and Grassland (Grain for Green Projects) aiming at preventing soil erosion in key regions, these projects are ecological construction projects in the development of forest industry that have the widest coverage and most sophisticated procedures, with strong policy implications and most active participation of the people.
Projects on Protection Forests in North China and Yangtze River Basin covering the widest areas in China with a rich variety of contents, these projects aim at solving the problem of sand and dust in northeastern China, northern China and northwestern China and the ecological issues in other areas. More specifically, they include phase IV of Project on North China protection forests, phase II of Project on protection forests at the middle and lower streams of Yangtze River and at the Huihe River and Taihu Lake valley, phase II of Project on coastal protection forests, phase II of Project on Pearl River protection forests, phase II Project on greenery of Taihang Mountain and phase II Projects on greenery of plains.
Projects on Preserving Wild Animals and Plants and on Construction of Natural Reserves aiming at gene preservation and protection of bio-diversity, nature and wetlands, these projects are forward-looking with strategic perspectives in line with international trends and practices.
Wetlands refer to marshland and peat bog, whether natural or man-made, permanent or temporary; water covered areas, whether stagnant or flowing, with fresh or semi-fresh or salty water that is less than 6 meters deep at low tide; as well as coral beach, weed beach, mud beach, mangrove, river outlet, rivers, fresh-water marshland, marshland forests, lakes, salty bog and salt lakes along the coastal areas.
Natural Reserves refer to certain areas of land, waters or sea demarked and approved by relevant governments at all levels to put under special protection and management in order to protect the natural environment and natural resources and to promote the sustainable development of the national economy. According to the objects be protected, the natural reserves are classified into classes of natural ecosystem, wild life and natural heritage. Scenic spots and cultural preservation zones are not included.
Landslides refer to the geological phenomenon of unstable rocks and earth on slopes sliding down along certain soft surface as a result of gravitational force. Role of surface water and underground water, and destruction of the stability of slopes by irrational construction work are usually main factors triggering the landslides. Several damages are often caused by landslides in open mining, in water conservancy projects, and in the construction of railways and highways.
Collapse refers to the geological phenomenon of large mass of rocks or earth suddenly collapsing from the mountain or cliff as a result of gravitational force. Usually caused by weathering of rocks, permeance of rain or earthquakes, collapse often destructs buildings and blocks river course or transport routes.
Mud-rock Flow refers to the sudden rush of flood torrents containing large amount of mud and rocks in mountainnous areas. It is found mostly in semi-arid hills or plateaus. High and precipitous topographic features, loose soil mass, heavy rains or melting water contribute to the mud-rock flow.
Land Subside refers to the geological phenomenon of surface rocks or earth subsiding into holes or pits as a result of natural or human factors. Land subside can be classified as karst subside and non-karst subside.
Environmental Emergencies refer to environmental emergencies that caused or likely to cause significant causalities, serious property damages and pose a major threat and damage to the economic, social or political stability of the country or a region, or have significant social impact that related to the public safety.
Environment Pollution and Destruction Accidents refer to sudden accidents, due to economic or social activities that are contrary to environment protection laws or due to unforeseen factors or natural disasters, that lead to environment pollution, destruction of protected wild animals, plants or nature reserves, damage to human health, economic and property losses, and other negative impacts on the society.
Funds Allocated to Afforestation refers to the total funds which have been transfered into the specific accounts of the agencies responsible for afforestation projects at reporting period.
Completed Investment for Afforestation during the Year reflecting the actual size of investment completed during January 1 and December 31 of the reference year, this indicator is important in estimating investment efficiency and in making annual analysis of the performance of the national economy.