主要统计指标解释

供水综合生产能力 指按供水设施取水、净化、送水、出厂输水干管等环节设计能力计算的综合生产能力。包括在原设计能力的基础上，经挖、革、改增加的生产能力。计算时，以四个环节中最薄弱的环节为主确定能力。

城市供水总量 指报告期供水企业(单位)供出的全部水量。包括有效供水量和漏损水量。

用水普及率 指报告期末城区用水人口数与城市人口总数的比率。计算公式：

排水管道长度 指所有排水总管、干管、支管、检查井及连接井进出口等长度之和。

城市绿地面积 指报告期末用作园林和绿化的各种绿地面积。包括公园绿地、生产绿地、防护绿地、附属绿地和其他绿地的面积。

公园绿地 城市中向公众开放的、以游憩为主要功能，有一定的游憩设施和服务设施，同时兼有健全生态、美化景观、防灾减灾等综合作用的绿化用地。包括综合公园、社区公园、专类公园、带状公园和街旁绿地。其中综合公园、专类公园和带状公园面积之和为公园面积。

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.

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.

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:

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

Area of Urban Green Land  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, theme park, linear park and roadside green space. Total areas of comprehensive park, topic park and belt-shaped is the area of park.