Minimization of External Influence Factors when Measuring the spectral Underwater illumination of Freshwater Reservoirs
УДК 535.3:551.46.07
Abstract
Spectral underwater illumination at different depths of several sections of Lake Teletskoye water area was studied during the complex expeditionary work in August 2024 using the measuring complex currently under development. When processing the measured data, it is discovered that external factors like cloudiness, atmospheric haze, and wind-induced surface waves impact the measurements. The influence of the first two factors can be minimized using two measuring boxes — near-surface and submersible — of the developing complex. The near-surface box registers changes in clouds and atmospheric haze and provides the corrections to calculations of the disturbance and measurements of illumination at depths. The impact of weak wind-induced water surface disturbance can be reduced by considering the optimal measurement duration and statistical approach to measured data processing proposed in the paper. The results of statistical processing of the measured values of spectral underwater illumination at wavelengths of 459nm, 616nm, and 655nm for different series of conducted experiments are presented. The approach to estimate the frequency of water surface disturbance based on the measured illumination values is also proposed.
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