Offshore eutrophication evaluation system

Abstract

The invention discloses an offshore eutrophication evaluation system, and the system comprises a collection module which is used for collecting offshore water body data, and transmitting the offshore water body data to a preprocessing module and a storage module; a storage module used for storing the offshore water body data acquired by the acquisition module; a preprocessing module used for preprocessing the offshore water body data; a processing module used for processing the preprocessed offshore water body data to obtain a threshold value; and an early warning module used for giving an alarm when the detection value exceeds the threshold value. The concentration of chlorophyll a is measured and subjected to multi-parameter evaluation by adopting a fluorescence method, the accuracy of evaluating whether the water body is in an eutrophication state is improved, the processing module can calculate a threshold value of whether any near-seawater water body is in the eutrophication state or not through training of the support vector machine model on the processing module, and the accuracy of evaluating whether the water body is in the eutrophication state is improved. And the influence of the diversity of the variables in the water body on the evaluation accuracy is reduced.

Description

technical field [0001] The invention relates to the field of water body eutrophication, in particular to an evaluation system for offshore eutrophication. Background technique [0002] Eutrophication is the enrichment of water bodies due to the increase of nutrients, which cause the rapid growth of algae and other advanced plants, and affect the ecological balance of water areas. Nutrients include nitrogen, phosphorus and other nutrients. With the increase of human activities and the acceleration of industrialization, a large amount of domestic sewage and industrial wastewater are directly or indirectly discharged into the ocean, making the problem of eutrophication in the coastal waters more and more serious, and it has become an ecological problem that is generally concerned by coastal cities around the world. Not only affects the ecological environment, but also affects people's production and life, so offshore eutrophication has become one of the important factors that s...

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Problems solved by technology

Among them, the E value method is an empirical method. The advantage is that the method is relatively simple, but this method cannot fully reflect the status of coastal eutrophication, and its evaluation results are relatively one-sided, and the accuracy needs to be considered; For detection, the real-time detection value is compared with the threshold value. The threshold value is determined according to the water quality of seawater; the TRIX index method sets the upper and lower limits of the evaluation parameters, and uses nitrogen, phosphorus, dissolved oxygen saturation, and chlorophyll concentration as evaluation parameters. Advantages In order to make the evaluation results more comprehensive and accurate, the evaluation parameter thresholds in different sea areas are generally different, so it cannot be applied to the comparison of eutrophication levels in different water bodies

In summary, compared with the single-factor evaluation method, the comprehensive index evaluation method takes into account the comprehensive influence of multiple factors such as biology, chemistry, and physics. However, due to the complexity of the marine ecosystem and the interaction of multiple factors in the ecological environment, The characteristics of offshore eutrophication should also be considered, and more accurate methods should be adopted, and there are few studies on the method for automatic monitoring of whether the water body is eutrophic. evaluation system

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