Explanatory Notes on Main Statistical Indicators

Production Capacity of Water Supply   refers to the designed overall production capacity of water facilities, covering the four segments of water collection, purification, conveyance, and outflow through trunk pipelines. The capacity is determined mainly on the weakest of the above-mentioned four segments.

Length of Water Supply Pipelines  refers to the total length of all municipal pipelines between the water pumps and the user service pipes, excluding pipelines newly installed but not in use yet, pipelines in the water factories, and pipelines in the users’ buildings.

Total Volume of Urban Water Supply   refers to the total volume of water supplied by water-works (units) during the reference period, including both the effective water supply and loss during the water supply.

Consumption of Water for Daily Use  includes consumption of water for public service use and consumption of water for household use. Consumption of water for public service use refers to water consumption for public service in the urban areas, including water consumption of administrative institutions, military barracks, public facilities, wholesale and retail, accommodation and catering industries and social service industry, etc. Consumption of water for household use refers to consumption of water for daily life of all households in cities, including households of urban residents and farmers, and public water supply stations.

Consumption of Water for Production Use  refers to water consumption in the process of production and operation by production and operation units of agriculture, forestry, animal husbandry, fisheries, manufacturing, construction, transport, etc. in urban areas.

Coverage Rate of Urban Population with Access to Tap Water refers to the ratio of the urban population with access to tap water to the total urban population at the end of reference period. The formula is:

Production Capacity of Gaswork Gas  refers to the overall production capacity of the urban gasworks in gas generation, purification and delivery at the end of the reference period, excluding capacity of the reserved facilities. In general, it is determined by the designed capacity, and when actual production capacity is larger than the designed capacity, the capacity is determined by the actual measurement on the weakest segment in the production, purification and delivery.

Length of Gas Pipelines  refers to the total length of pipelines in use between the outlet of the compressor of gas-work or outlet of gas stations and the leading pipe of users, excluding pipelines newly installed but not in use yet, pipelines within gasworks, delivery stations, LPG storage stations, refilling stations, gas-mixing stations and supply stations, and pipelines in the users’ buildings.

Volume of Gas Supply   refers to the total volume of gas provided to users by gas-producing enterprises (units) during the reporting period, including the volume sold and the volume lost.

Coverage Rate of Urban Population with Access to Gas   refers to the ratio of the urban population with access to gas to the total urban population at the end of the reference period. Gas here includes gaswork gas, natural gas and liquefied petroleum gas. The formula is:

Heating Capacity in Urban Areas refers to the designed capacity of heating enterprises (units) in supplying heating energy to urban users during the reference period.

Quantity of Heat Supplied in Urban Areas  refers to the total quantity of heat from steam and hot water supplied to urban users by heating enterprises (units) during the reference period.

Length of Urban Heating Pipelines  refers to the total length of steam or hot water pipelines for sources of heat to the leading pipelines of the buildings of the users, excluding internal pipelines in heat generating enterprises.

Length of Paved Roads  refers to the length of roads with paved surface, including bridges and tunnels connected with roads.  Length of the roads is measured by the central lines.

Urban Bridges  refer to bridges built to cross over natural or man-made barriers, including bridges over rivers, overpasses for traffic and for pedestrians, underpasses for pedestrians, etc.

Length of Urban Sewage Pipes  refers to the total length of municipal general drainage, trunks, branch and inspection wells, connection wells, inlets and outlets, etc.

Daily Disposal Capacity of Urban Sewage  refers to the designed 24-hour capacity of sewage disposal by the sewage treatment works or facilities.

Area of Green Space  refers to the total area occupied for green projects at the end of the reference period, including public recreational green space, protection green land, land for squares, green land attached to institutions, and other green areas.

Public Recreational Green Space  refers to green areas open to the public for amusement and rest with the facilities of amusement, rest and services. Its function also includes improving ecology, beautifying landscape, education and preventing and reducing disaster.

Area under Cleaning Program refers to the area which are regularly cleaned at urban roads and public places (including urban roadways, pedestrian walkways, vehical tunnels, pedestrian underpasses, underground railway stations, lifted roads, pedestrians walk bridges, overpasses, plazas, parking lots and other facilities), at the end of the reference period,. If the cleaning is conducted at a location several times a day, the area that is cleaned with the largest space will be taken.

Vehicles and Facilities Dedicated to Urban Cleaning and Environmental Sanitation  refer to vehicles and facilities dedicated for use in the operation, management and monitoring of environmental sanitation work. They include vehicles for road cleaning, washing, showering, ice removal, disposal of garbage and human wastes, sanitation monitoring and related activities.

Public Buses and Trolley Buses per 10000 Population  refers to the number of public buses and trolley buses, calculated on basis of per 10000 urban population.