China’s water resources total quantity is 2.8 trillion cubic meters. The 2.7 surface water groundwater trillion cubic meters, 0.83 trillion cubic meters, water resources gross resides the world the sixth, per capita consumption of 2240 cubic meters, statistics from the world bank for the 153 countries ranked eighty-eighth. China’s present situation of water resources shortage in total, per capita is low, area distributings not all, water and soil resources do not match, water pollution, water shortage city highlights the problems. The quickening of urbanization and regional economic development, increased the local water resources load, also aggravate city groundwater pollution, a lot of city groundwater appeared eutrophication, iron and manganese and other problems. The problem of water pollution has become China’s economic and social development of the most important restrict one of elements, has caused the country and local government attaches great importance to. " Eleven five" period, our country determines the unit GDP energy consumption decrease every year 4%, year 5 reduction target of 20%; emissions of major pollutants, including sulfur dioxide, chemical oxygen demand total 5 years to reduce the 10% emission reduction target. In water pollution control work, water quality monitoring is pollution early warning, persistent pollutants monitoring and management effectiveness assessment of important means, has received the attention of concerned branch. As the continuous monitoring of tool for water quality on-line monitoring instrument providing the accurate monitoring data and monitoring report responsibility, in environmental monitoring work plays a more and more important role.

One, general situation of development of industry

The traditional environmental water quality monitoring work in artificial field sampling, laboratory instruments analysis. Although in the laboratory analysis means complete, but laboratory monitoring monitoring for the presence of low frequency, sampling error, monitoring data dispersion, cannot reflect the pollution situation and other defects, to meet the government and enterprises to carry out effective management on water environment of demand. From the foreign environmental monitoring and the development trend of the international advanced experience, on-line water quality automatic monitoring has become a relevant departments timely access to continuous monitoring data effectively. After only a few minutes of data acquisition, the water quality of the water source information can be sent to the server in environmental analysis center. Once observed that some pollutants concentration changing, environmental regulators can take corresponding measures, sampling analysis. Visible, water quality on-line analysis system will be the biggest advantage lies in can quickly and accurately obtain water quality monitoring data. Automatic water quality monitoring system, is helpful to the environmental protection departments to establish a wide range of monitoring network to collect monitoring data, to determine the target area pollution status and development trend of. With the monitoring technology and instrument of industrial development, environmental water quality monitoring work began to automation, intelligent and network monitoring direction.

Two, development planning and industry regulatory system

1, Planning requirements

" The people’s Republic of China National Economic and social development Eleventh Five Year Plan" requirement" eleven five" period the main pollutant COD and sulfur dioxide emissions reduced by 10%, and clearly defined the major pollutants emission reduction target in economic and social development as the tie sex index. For the realization of " eleven five" program compendium of pollutants emission reduction targets, the state environmental protection administration put forward to accelerate pollutants emission reduction, monitoring and assessment system construction, the key state-monitored pollution source automatic monitoring, supervisory monitoring of pollution sources, environmental law enforcement, environmental statistics so as to improve the ability, and the Ministry of Finance and development change appoint support energetically. The key state-monitored pollution source monitoring refers to: the total major pollutants emission load of more than 65% industrial enterprises as well as the city sewage treatment plant to realize online automatic monitoring and real-time data upload. Belongs to the range of a total of about 7000 enterprises, plans to be completed by the end of 2008.

In 2011 the new enactment of the" people’s Republic of China National Economic and social development Twelfth Five Year Plan" proposed " to increase environmental protection strength. In order to solve the drinking water safety and air, soil pollution and damage the health of the masses of the outstanding environmental problems as the focus, strengthen the comprehensive management, improve environmental quality. Implementation of emission reduction target responsibility system, strengthen pollution reduction and management, increase the total amount of major pollutants emission control type, speed up urban sewage, waste disposal facilities construction, increase the focus on water pollution prevention and control efforts, effectively control the city air, noise pollution, enhanced heavy metal, hazardous waste, soil pollution control, strengthen nuclear and radiation monitoring ability. Strict emission standards and environmental impact assessment, aggrandizement executes the law supervise, perfect major environmental events and pollution accident accountability system. Improvement of environmental protection science and technology and economic policy, establish and perfect the polluter pay system, build multivariate investment and financing mechanism, vigorously develop the environmental protection industry." Is expected in the 12th Five-Year Plan period, environmental water quality online monitoring system construction will accelerate further, total amount con