Explanatory Notes on Main Statistical Indicators
Developed
Area
refer to the land in administrative areas having been developed concentratedly with municipal public facilities. For core
city, developed areas include concentrated areas and decentralized areas having
basic perfect municipal public facilities; for the city with several towns,
developed areas are composed of several concentrated areas with municipal
public facilities. Therefore, the scope of developed areas refers to actual
construction land of a city.
Water
Resources
refers to the gross volume of surface and underground water formed by
precipitation in the evaluated region, which equals to the sum of surface
runoff and the infiltration supplement of underground water from precipitation,
excluding crossing water.
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 Residue 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 depending on the pH value of
the water below 4 or above 10.5 when the stone is in, or soaked by, the water.
Comprehensive
Utilization of Industrial Waste Residue
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.
Ratio
of Comprehensive Utilization of Industrial Waste Residue
refers to the percentage of industrial solid wastes utilized over
industrial solid wastes produced (including stocks of the previous years). It
is calculated as:
Ratio of Comprehensive Utilization of
Industrial Waste Residue =
Volume
of Industrial Solid Wastes Utilized ��
100%
Industrial
Solid Wastes Produced + Stock of Previous Years
Level
of Equivalent Noise (LEQ)
refer to the A sound pressure of a
continuous steady state sound, in the specified time interval with the same
mean square A sound pressure as the time variant noise. This sound level of a
continuous steady state sound is the equivalent sound level of the time variant
noise. The smaller of the value of noise equivalent sound level (dB), the
better.
Natural
Reserves
refer to certain areas of land, waters or sea that are representative in
natural ecological systems, or are natural habitats for rare or endangered wild
animals or plants, or water conservation zones, or the location of important
natural or historic relics, which are marked by law and put under special
protection and management. Natural reserves are designated by the formal
approval of governments at and above county level (including those approved by
relevant departments or ��revolutionary committees�� before 1980). Scenic spots
and cultural preservation zones are not included.