Method for determining river state and self-purification ability by combination of respiratory map and spectrum

Abstract

The invention discloses a method for determining a river state and self-purification ability by combination of a respiratory map and a spectrum. The method comprises: taking a suspension in a representative section of a river, carrying out respiratory map analysis, determining an oxygen consumption rate OUR value, determining three-dimensional fluorescence spectrums and ultraviolet absorbancy degrees of dissolved organic matters in all representative sections, dividing the three-dimensional fluorescence spectrums into five regions according to peak positions, selecting peaks T and absorbance UV254 for characterizing proteoids, drawing a dot map, and dividing the dot map plane into six regions corresponding to different river states. The method analyzes and determines the state and the self-purification ability of the river according to the combination of the spectrum and respiratory map. The method builds a river state comprehensive evaluation method and provides the theoretical basisand technical support for river ecological management.

Description

technical field [0001] The invention belongs to the field of self-purification of rivers, and relates to a method for determining river state and self-purification ability by measuring river spectrum and breath spectrum, and combining breath spectrum and spectrum. Background technique [0002] Self-purification of a river is a complex process involving physical, chemical and biological processes, and it is a phenomenon of restoring its clean state within a certain distance. The purification process includes various mechanisms such as dilution, precipitation, re-aeration, adsorption, absorption, and chemical and biological reactions, which can be evaluated by mathematical models. Streeter and Phelps proposed a precursor to the modern water quality model and applied it to a study on the Ohio River to improve the efficiency of pollution control actions. The equation was derived by later researchers and developed many computer applications. Numerical models used in , which are ...

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Problems solved by technology

[0003] The DO concentration in the Streeter-Phelps BOD-DO system model is the main indicator to measure the health of the river, and it responds to the biochemical oxygen demand (BOD) load, which is why the oxygen demand is traditionally used to evaluate the pollution degree and The reason for the degree of self-cleaning is simple to measure, but the complex mechanisms involved must be studied through mathematical models

However, the acquisition of experimental data and the calculation process of the DO-BOD model are complicated, and require a lot of time and energy for professionals. Therefore, it is urgent to explore a simple and effective evaluation method for river self-purification capacity.

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