Estimating vulnerability of water body using Sentinel-2 images and environmental modelling: the study case of Bracciano Lake (Italy)

Abstract

Due to the concomitance of several factors related to progressive climate changes and to increased water management for anthropogenic usage, drastic fall in level of Bracciano Lake, a volcanic lake, 30 km northwest of Rome, was reported. In November 2017 the water level decreased 1.98 m below the hydrometric zero. Vulnerability to eutrophication was investigated by determination of the lake water volume and the related phosphorus concentration. At this purpose, the bathymetry layer of the water body and the application of supervised classification of Sentinel-2 images allowed to quantify the water body and to define the coastline shape. Once calculated the hydrometric reduction in water body after the hydrometric crisis, occurred in 2017, Vollenweider model allowed to estimate nutrient concentration (around 100.93 µg/l) and the relative increase of the eutrophication status (+2.3% per liter). According to the lake water quality classification proposed by the OECD, we classified the lake as a very eutrophic lake with a hypertrophic level in the period of water crisis. The proposed methodology represents an efficient monitoring tool for assessing the vulnerability of water bodies influenced by eutrophication. ARTICLE HISTORY

Methodology for assessing the geoecological state of landscape-lake systems and their cartographic modelling (case study of Lake Bile, Rivne Nature Reserve, Ukraine)

“…Bathymetric surveying of lakes is one of the most time-consuming and mandatory components of landscape and limnological studies. This fact is also confirmed by other scientists' (Giuliani et al 2019;Paul et al 2019;Muhtadi et al 2020;Chormanski et al 2021;Simpson et al 2021;Hamilton et al 2022;Yang et al 2022) studies related to the bathymetric survey of different water bodies in terms of depth, area and natural-geographical location. In August 2020, high-precision echo sounding with the geodetic surveying of the water section was carried out on Lake Bile.…”

The management of transformed small river basins of Volyn Polissia – Buniv River case study

“…The assessment of the transformation level in the Buniv River basin makes it necessary to improve the monitoring system within the river basin, as the main tool for assessing and predicting changes in the aquatic ecosystem and managing the processes of its anthropogenic transformation. Water quality monitoring can be effectively supported through the use of satellite technology [12,13].…”

Cadastral and landscape modeling of lakes as a prerequisite for protected and recreational nature resource management

“…A model of geographic management of a nature reserve [8] was developed within the framework of the "Electronic Turkey" project. Some studies were devoted to the validation of remote sensing indices for water monitoring using Sentinel-2 [9,10], which can be applied to the cadastre development of lake systems of protected areas. Although successfully tested the methods of capturing littoral zones (up to 1.6 m under clear water conditions) using a UAV complex with a LIDAR scanner on board [11].…”