Method for evaluating apparent quality of landscape water body

Abstract

The invention discloses a method for evaluating the apparent quality of a landscape water body. The method comprises the following steps: according to the quantitative relationship between the reflective spectrum and the turbidity of the water body, as well as the correspondence of the chromatic value of the color of the water body to the color of the water body, obtaining a curve of relationship between the reflectivity and the wavelength of the water body, and the chromatic value of light reflected by the water body through a spectrum measuring device; calculating the area, under the wavelength between 450 nm and 750 nm, of the curve of relationship between the reflectivity and the wavelength of the water body, and the absolute value of the difference between the chromatic values of the water body and clear water; according to the area sum, quantitatively evaluating the grade of the apparent quality of the water body. According to the method, evaluation on the apparent quality of the landscape water body is quantified, secondary pollution of chemical reagents is avoided, and the chromatic value of the color of the water body can be obtained directly. When the apparent quality of the landscape water body is evaluated by the method, a relatively good evaluation result can be obtained and conformity to an on-site evaluation result is relatively good.

Description

Technical field [0001] The invention relates to a quality evaluation method for water bodies, in particular to an evaluation method suitable for the apparent quality of landscape water bodies. Background technique [0002] At present, the most important function of urban water bodies in my country is to serve as landscape water bodies, and good apparent properties are the most basic characteristics that urban water bodies should have. However, the water quality of the landscape water body is polluted due to various reasons, the water body's appearance deteriorates, the water body is turbid, the transparency is low, and it often presents various uncomfortable colors and is often accompanied by peculiar smells, and even black odor, water bloom and other phenomena. [0003] The evaluation of the apparent quality of the landscape water body is subjective and is affected by the reference, time, location and environment. Therefore, in order to objectively evaluate the apparent quality of...

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Problems solved by technology

[0004] Before the present invention is made, mainly contain following three kinds to landscape water body apparent quality evaluation method: 1, black and odor evaluation method, are generally divided into two big classes: critical index method and discriminant relationship formula method; However, most urban landscape water bodies are non-black and odorous water bodies, and this evaluation method does not provide an evaluation method for the apparent quality of non-black and odorous water bodies.

2. Using the absorption spectrum of water to study the evaluation method of its apparent quality, by studying the maximum absorbance of the curve, the average absorbance, the wavelength corresponding to the place where the maximum absorbance occurs, the horizontal distance between the starting point and the point where the curve tends to be gentle, and the gentleness of the curve Parameters such as the vertical distance relative to the coordinate axis, the qualitative relationship between the appearance of the water body and the spectral curve was obtained, but no quantitative relationship was studied

However, this method only obtains the quality factor for evaluating the apparent quality of the water body through 5 water body samples, which is not universal for a large number of landscape water body samples

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