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. Increased capacity through transformation and innovation projects is
included as well. The capacity is determined mainly on the weakest of the
above-mentioned four segments.
Length
of Water Supply Pipelines at Year-end refers to
the total length of all the pipelines between the water pumps and the user
water meters, excluding pipelines newly installed but not used yet, pipeline in
the water factory,and pipeline in the user’s buildings.
Annual
Volume of 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 Residential Use refers to water consumption of
households for daily life and water consumption of public service facilities.
The latter refers to water consumption for urban public services, including the
consumption of government agencies and public institutions, military barracks,
public facilities, wholesale and retail outlets, restaurants, hotels, and other
units providing public services. Household water consumption refers to
consumption of water for daily life of all households within the boundary of
cities, including households of urban residents and farmers, and public water
supply stations.
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. 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 within gasworks, delivery stations, LPG storage stations,
refilling stations, gas-mixing stations and supply stations.
Volume
of Gas Supply refers to the total volume of gas
provided to users by gas-producing enterprises (units) in a year, 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. 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 at Year-end refers to the length of roads with paved
surface including bridges and tunnels connected with roads by the end of the
year. Length of the roads is measured by the central lines for vehicles
for paved roads with a width of 3.5 meters and over, including roads in open-ended
factory compounds and residential quarters.
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. Both permanent and
semi-permanent bridges are included.
Length
of Urban Sewage Pipes refers to the total length of 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.
Number
of Vehicles under Operation at Year-end refers to
the total number of vehicles under operation by public transport enterprises
(units) at the end of the year, based on the records of operational vehicles by
the enterprises (units).
Area
of Urban Green Areas refers to the total area occupied
for green projects at the end of the reference period, including park green
land, production green land, protection green land, green land attached to
institutions, and other green areas.
Park
Green Area refers to green areas open to the public
for amusement and rest with the facilities of amusement, rest and services. Its
function includes perfecting ecology, beautifying landscape, and preventing and
reducing disaster. Park green areas include comprehensive park, community park,
topic park, belt-shaped park and green area nearby street. Total areas of
comprehensive park, topic park and belt-shaped is the area of park.
Area
Cleaned refers to the area which are regularly
cleaned, as at the end of the reference period, at urban roads and public
places (mainly including urban roadways, pedestrian walkways, vehicular
tunnels, pedestrian underpasses, underground railway stations, lifted roads,
pedestrians walk bridges, overpasses, plazas, carparks and other facilities).
If there are several times of cleaning in a day at a location, the area of that
time of cleaning with the largest area cleaned will be taken.
Vehicles
Dedicated to Urban Cleanliness and Environmental Sanitation
refer to vehicles and facilities dedicated for use in the operation,
management and monitoring of environmental hygiene work. They include vehicles
for road cleaning, washing, showering, ice removal, disposal of garbage and
human wastes, cleanliness monitoring and related activities.
Public
Transportation Vehicles per 10000 Population
refers to the number of public transportation vehicles, at the end of
the reference period, per 10000 population in the city district. The formula
for calculation is:
