情况监测试题(国外英文资料).docVIP

环境监测试题 1) the river often sets three kinds of sections, namely, control section, control section and reduction section. Cross section: before a river enters a city or an industrial zone; Control section: generally located in the downstream outlet of 500 ~ 1000 m (or directly, the larger tributaries upstream HuiGeKou and rendezvous with river after the location of the mix, the mouth of the river, lake, reservoir and river mouth, the international rivers in and out border border entry exit, etc.); Cut section: the end of a drainage area of 1500m from the city or industrial zone. (2) sample points: every vertical line, when the water depth is less than or equal to 5m, set a sample point at 0.3 ~ 0.5 m below the surface of the water. At the depth of 5-10 m, a sample point is set at the bottom of the surface of the water under 0.3 ~ 0.5 m and 0.5 m on the bottom of the river. When the water is 10 to 50 megabytes, set three sample points. It is 0.3 ~ 0.5 m below the surface of the water, and it is about 0.5 m above the bottom of the river. When the water depth exceeds 50 m, the sample points should be added as appropriate. What is the difference between COD and permanganate? COD is used to measure industrial waste water, with an oxidation rate of 90% The permanganate index is used to measure surface water, drinking water, living sewage and oxidation rate of 50% Environmental monitoring classification? According to the monitoring of medium classification 1 atmospheric pollution monitoring, water pollution, soil pollution and solid waste monitoring, biological pollution, ecology, physical pollution monitoring Monitoring surveillance, specific purpose monitoring, research monitoring and engineering monitoring are monitored Chromaticity: is measure of (say) the water color depth unit measurements said, can be divided into true color and table color color is the color, remove suspended solids in water after the water table color is not to remove suspended solids in water colo