Gorky Reservoir survey, 2016

A three-day June 2016 LIF lidar survey of the lake part of the Gorky Reservoir above the Gorodets dam, reading chlorophyll-a, CDOM, and suspended matter along the track

Gorky ReservoirVolga Basin

● Gorky Reservoir 2016, 2016-06-21 – 2016-06-2370,565 measurements IDW interpolation, 600 samples

Chl-a1.309.09µg/L

CDOM9.3414.1a.u.

TSM0.905.33mg/L

Fig. 1 Campaign measurement record. 70,565 lidar returns are plotted along the vessel track for Chl-a, CDOM, TSM. The field view applies inverse-distance weighting to the same observations; the shoreline is from OpenStreetMap.

From 21 to 23 June 2016, a LIF lidar surveyed the lake part of the Gorky Reservoir on the Volga, the 100 km reach above the Gorodets dam, recording chlorophyll-a, CDOM, and total suspended matter along the track.

Chlorophyll-a had a median of 3.3 µg/L and exceeded 7.6 µg/L in the highest 5% of readings, with CDOM near 11.8 a.u. and suspended matter near 1.7 mg/L. The reservoir develops blue-green algal blooms from June through October. The same reservoir was measured again from a motorboat on 21 and 22 September 2018, the campaign behind the regional Sentinel-2 retrieval models published in Remote Sensing in 2019.