The invention relates to a biological
water quality monitoring system by fish behaviors and a monitoring method thereof. The
monitoring system provided by the invention comprises a
data acquisition device, a
data analysis device and a transparent water tank, and is characterized in that the water tank is successively divided into a pipelining buffer area, a fish
shoal observation area and a
filtration adjusting area by netted fish baffle plates; the sidewall of the pipelining buffer area is provided with a water inlet
pipe; the outer portion of the fish
shoal observation area is equipped witha
light source; the sidewall of the
filtration adjusting area is provided with a water outlet
pipe; the
filtration adjusting area is provided with a
circulating pump; and the sidewall near the bottomof the water tank is equipped with a draining valve. The monitoring method provided by the invention comprises the following steps of: shooting the behaviors of the tested fish
shoal by the use of a camera to obtain an
image sequence, sending into a computer for real time
image processing and
data analysis, comparing obtained average
moving speed, dispersion and the like and a preset threshold value, and determining whether the
water quality is polluted or not. According to the invention, parametric records of fish behaviors in hydrostatic, pipelining and water-exchanging tests can be simultaneously realized, and the behaviors of individual and colonial
organism can be simultaneously measured.