Water quality automatic online station high-frequency continuous observation data quality control method

Abstract

The invention discloses a water quality automatic online station high-frequency continuous observation data quality control method which comprises the following steps: acquiring first water quality observation sequence data through an acquisition module to obtain a time sequence data set; carrying out differential operation on the time sequence data set, and carrying out stability detection to obtain stable differential time sequence data; determining a statistical window value and a sliding step size value range for the data, and carrying out sliding detection according to the statistical window value and the sliding step size; carrying out abnormal value detection through a plurality of detection methods to obtain corresponding abnormal values, and combining the abnormal values to obtaina comprehensive abnormal value; reconstructing the abnormal value sequence points to obtain second water quality observation sequence data to realize quality control of the water quality observationdata; according to the method, abnormal value detection is carried out on the water quality, reconstruction is carried out, data difference processing, stability detection and statistical window and sliding detection are combined, quality control over automatic online station data of the water quality is achieved, and the method has industry popularization value and application prospects.

Description

technical field [0001] The invention relates to the research field of water environment information technology, in particular to a quality control method for high-frequency continuous observation data of an automatic online station for water quality. Background technique [0002] With the continuous deepening of the battle against pollution and the continuous development of monitoring technology, automatic monitoring has entered the field of water environment quality monitoring. It has the advantages of continuous monitoring in time and space and makes up for the shortcomings of manual monitoring. The automatic surface water quality monitoring system consists of an automatic surface water quality monitoring station (referred to as a water station) and an automatic water quality monitoring data platform (referred to as a data platform). At present, more than 2,000 national surface water quality automatic stations have been built in the country. The construction of large-scale...

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Problems solved by technology

At present, data quality control technologies at home and abroad are widely used in ocean observation data, and there are few studies on the quality control of surface water monitoring data.

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