水资源总量 一定区域内的水资源总量指当地降水形成的地表和地下产水量，即地表径流量与降水入渗补给量之和，不包括过境水量。

地表水资源量 指河流、湖泊、冰川等地表水体中由当地降水形成的、可以逐年更新的动态水量，即天然河川径流量。

地下水资源量 指当地降水和地表水对饱水岩土层的补给量。

地表水与地下水资源重复量 指地表水和地下水相互转化的部分，即在河川径流量中包括一部分地下水排泄量，地下水补给量中包括一部分来源于地表水的入渗量。

供水总量 指各种水源工程为用户提供的包括输水损失在内的毛供水量。

用水总量 指分配给用户的包括输水损失在内的毛用水量。按用户特性分为农业、工业、生活和生态用水四大类。

农业用水 包括农田灌溉和林牧渔业用水。林牧渔业用水指林果地灌溉、草地灌溉和鱼塘补水。

工业用水 按新水取用量计，不包括企业内部的重复利用水量。

生活用水 包括城镇生活用水和农村生活用水。城镇生活用水由居民用水和公共用水（含服务业、商饮业、货运邮电业及建筑业等用水）组成；农村生活用水除居民生活用水外，还包括畜用水在内。

城镇生活污水排放量 指城镇居民每年排放的生活污水。用人均系数法测算。测算公式为：

城镇生活污水排放量=城镇生活污水排放系数×市镇非农业人口×365

城镇生活污水中化学需氧量（COD）产生量 指城镇居民每年排放的生活污水中的COD的产生量。用人均系数法测算。测算公式为：

城镇生活污水中COD 产生量=城镇生活污水中COD 产生系数×市镇非农业人口×365

化学需氧量（COD） 测量有机和无机物质化学所消耗氧的质量浓度的水污染指数。

工业固体废物产生量 指报告期内企业在生产过程中产生的固体状、半固体状和高浓度液体状废弃物的总量，包括危险废物、冶炼废渣、粉煤灰、炉渣、煤矸石、尾矿、放射性废物和其他废物等；不包括矿山开采的剥离废石和掘进废石(煤矸石和呈酸性或碱性的废石除外)。酸性或碱性废石指采掘的废石其流经水、雨淋水的pH值小于4或pH值大于10.5者。

危险废物 指列入国家危险废物名录或根据国家规定的危险废物鉴别标准和鉴别方法认定的，具有爆炸性、易燃性、易氧化性、毒性、腐蚀性、易传染疾病等危险特性之一的废物。

工业固体废物综合利用量 指报告期内企业通过回收、加工、循环、交换等方式，从固体废物中提取或者使其转化为可以利用的资源、能源和其他原材料的固体废物量(包括当年利用往年的工业固体废物贮存量)，如用作农业肥料、生产建筑材料、筑路等。综合利用量由原产生固体废物的单位统计。

工业固体废物综合利用率 指工业固体废物综合利用量占工业固体废物产生量(包括综合利用往年贮存量)的百分率。计算公式为：

工业固体废物综合利用率=工业固体废物综合利用量/（工业固体废物产生量+综合利用往年贮存量）×100%

工业固体废物贮存量 指报告期内企业以综合利用或处置为目的，将固体废物暂时贮存或堆存在专设的贮存设施或专设的集中堆存场所内的数量。专设的固体废物贮存场所或贮存设施必须有防扩散、防流失、防渗漏、防止污染大气、水体的措施。

工业固体废物处置量 指报告期内企业将固体废物焚烧或者最终置于符合环境保护规定要求的场所，并不再回取的工业固体废物量(包括当年处置往年的工业固体废物贮存量)。处置方式有填埋(其中危险废物应安全填埋)、焚烧、专业贮存场(库)封场处理、深层灌注、回填矿井及海洋处置(经海洋管理部门同意投海处置)等。

工业固体废物排放量

指报告期内企业将所产生的固体废物排到固体废物污染防治设施、场所以外的数量，不包括矿山开采的剥离废石和掘进废石(煤矸石和呈酸性或碱性的废石除外)。

生活垃圾清运量 指报告期内收集和运送到垃圾处理厂(场)的生活垃圾数量。生活垃圾指城市日常生活或为城市日常生活提供服务的活动中产生的固体废物以及法律行政规定的视为城市生活垃圾的固体废物。包括：居民生活垃圾、商业垃圾、集市贸易市场垃圾、街道清扫垃圾、公共场所垃圾和机关、学校、厂矿等单位的生活垃圾。

生活垃圾无害化处理率 指报告期生活垃圾无害化处理量与生活垃圾产生量比率。在统计上，由于生活垃圾产生量不易取得，可用清运量代替。计算公式为：

生活垃圾无害化处理率=生活垃圾无害化处理量/生活垃圾产生量×100%

环境污染治理投资 指在工业污染源治理和城市环境基础设施建设的资金投入中，用于形成固定资产的资金。包括工业新老污染源治理工程投资、建设项目“三同时”环保投资，以及城市环境基础设施建设所投入的资金。

Explanatory Notes on Main Statistical Indicators

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 with groundwater while groundwater includes some replenishment with surface water.

Water Supply refers to gross water supply by supply systems from sources to consumers, including losses during distribution.

Water Use refers to gross water use distributed to users, including loss during transportation, broken down with use by agriculture, industry, living consumption and biological 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 fishing includes irrigation of forestry and orchards, irrigation of grassland and replenishment of fishing pools.

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, telecommunication and construction). Rural water use by living consumption includes both households and animals.

Urban Non-industrial Waste Water Discharge refers to annual discharge of non-industrial waste water by urban households. It is estimated by per capita coefficient using the formula:

Urban non-industrial waste water discharge = urban non-industrial waste water discharge coefficient urban non-agricultural population 365

Volume of Chemical Oxygen Demand (COD) Generated by Urban Non-industrial Waster Water refers to chemical oxygen demand generated through the annual discharge of non-industrial waste water by urban households. It is estimated as:

Volume of chemical oxygen demand (cod) generated by urban non-industrial waster water = Coefficient of COD generated through urban non-industrial waste water× urban non-agricultural population ×365

Chemical Oxygen Demand (COD) refers to index of water pollution measuring the mass concentration of oxygen consumed by the chemical breakdown of organic and inorganic matter.

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 depending on the pH value of the water below 4 or above 10.5 when the stone is in, or soaked by, the water.

Hazardous Wastes refers to those included in the national hazardous wastes catalogue or specified as any one of the following properties in the national hazardous wastes identification standards: explosive, ignitable, oxidizable, toxic, corrosive or liable to cause infectious diseases or lead to other dangers.

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.

Ratio of Industrial Solid Wastes Utilized 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 industrial solid wastes utilized = volume of industrial solid wastes utilized / (industrial solid wastes produced + stock of previous years) 100%

Stocks of Industrial Solid Wastes refers to 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 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 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 wastes treated = (consumption wastes treated / consumption wastes produced) ×100%

Investment in Environment Pollution Harnessing Projects refers to the proportion of investment in fixed assets in the total investment in harnessing industrial pollution and in the construction of urban environment infrastructure facilities. It includes investment in harnessing sources of industrial pollution, investment in environment protection facilities designed concurrently with construction projects, and investment in urban environment infrastructure facilities.