The paper discusses the basic principles of using geoinformation technologies to study relief-forming processes and the ecological state of aquatic ecosystems. The object of the study is the territory of the city of Sevastopol within the valleys of the Chernaya, Kacha and Belbek rivers. To conduct environmental monitoring, it is proposed to use field and chemical-analytical methods. According to the data obtained, information and analytical maps with a geodatabase are produced. Creation of an information and analytical map with a database using GIS toolkit makes it possible to identify factors influencing the deformation of the river bed and changes in the ecological state of aquatic ecosystems. The proposed technology for monitoring the study area allows saving data, using them in projects, and supplementing these data as new information becomes available.

The paper considers the ecological and taxonomic structure of the winter algocoenosis of the Chernaya, Kacha, and Belbek rivers within the territory of the city of Sevastopol. The results of studies were obtained on 30 chemical and physical parameters of surface water samples during the period of algological sampling. The collection of field material (phytoplankton, algae in fouling, on various substrates immersed in water) and its processing was carried out according to the methods generally accepted in algological practice. The diagnostic features, as well as the similarities and differences in the species diversity of algae, have been determined. The studies carried out show that the studied algocoenosis are characterized in winter period by a rich species composition, with a significant predominance of diatoms. The algae found in the studied rivers are indicators of water purity, and their occurrence activity and abundance can indicate that the content of organic matter in the waters of the Belbek and Kacha rivers is lower than in the Chernaya river. This is confirmed by the presence of algae xenosaprobionts in the waters of the Belbek and Kacha rivers, which are indicators of clean, not polluted, with organic substances water.

Landscape monitoring is organized to monitor the state of natural complexes and their transformation. Monitoring of landscapes should ensure the identification of anthropogenic load, the dynamics of areas of anthropogenic impact, the degree of degradation of natural complexes. The Timan-Pechora oil and gas province is located on the territory of the Republic of Komi, the Nenets Autonomous Okrug and the adjacent water area of the Pechora Sea. The area of the province is 600 thousand km2. Currently, the development and extraction of mineral resources, mainly oil and gas, is actively underway in the territory under consideration. This is a complex process that requires the collaboration of many specialists, including ecologists. In the Bol'shezemel'skaya Tundra, the dominant part of tundra landscapes are extremely sensitive to anthropogenic influence and the unorganized use of the available space will soon lead to the complete loss of their own functions, and their restoration will take a huge amount of time. In this paper, a basic field study method was chosen as the main method to study the landscape. Thanks to route observations, a complex landscape characteristic of the territory was compiled.