Bank development

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The increasing differentiation of the bank over longer periods of time is called the bank development of a lake . A strong bank development is rated as an ecological quality feature.

As an attempt to quantify the ratio of the length of the bank to the circumference of a circle , the area of ​​which is identical to that of the lake, was proposed. The ratio should be an indication of the abundance of bays in a lake and indicate the importance of the shore zone . Ratios between 3 and 6 were given for dams , and between 1.6 and 3 for natural lakes, which suggests a stronger bank development in dams.

Against the background of the fractal character of a bank length , a simple length measurement is impossible, which is why the quantification of the bank development with the help of the described ratio is problematic: for one and the same lake, the ratio can be increased as desired by increasing the scale. This means that the ecological significance of this quantity is no longer valid.

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