## 3 Results and Discussion
Critical infrastructure in the area includes a local airport for passenger transportation, a river port for seasonal cargo and passenger operations, and a network of winter roads that ensure access during the colder months [53]. The parent materials of the settlement and its surroundings are sandy-textured alluvial sediments, and the vegetation type is northern taiga forests. Natural soils as well as soil of recreational zones are presented by weakly developed Podzols with a low thickness of E horizon--Entic Podzols, folic, and arenic (O-e-BF-C-\(\sim\)-). These soils demonstrate stratification inherited from alluvial parent materials. The topsoil in the residential area has been completely replaced by transported material of a sandy texture; the BF horizon of the original podzols is covered by this transported material (RAT-BF-C). The soils in the industrial area have been completely replaced and contain at least three different layers of technogenic sediment (TCH-C). It appears that these soils contain solid remnants of technogenic waste. Therefore, recreation does not have a significant impact on the soil, as there has not been any greening or park development. Instead, recreation is expressed through the degradation of the forest floor due to the pressure of vacationer foot traffic. The city of Muravlenko is located in the southern part of the Yamalo-Nenets Autonomous Okrug (YaNAO), within the northern taiga subzone, on alluvial-glacial sandy deposits. Originally founded in 1982 as a settlement for oil workers, it gained city status in 1990 due to the intensive development of the region's hydrocarbon resources. The population of Muravlenko is approximately 30,000, reflecting its role as a hub for oil extraction infrastructure [52]. The city's establishment was directly tied to the discovery of the Sutorminskoye (1967 y.) and Muravlenkovskoye (1983 y.) oil fields, which catalyzed the urbanization of this previously undeveloped territory. Initially, a temporary settlement existed on the site of modern Muravlenko, providing logistical support for geological exploration expeditions. A pivotal moment came in 1981 with the decision by the USSR Ministry of the Oil Industry to construct a permanent settlement for oil industry workers. By 1985, the first apartment buildings, a school, a hospital, and the Neftyanik cultural center had been commissioned, enabling workforce retention under extreme climatic conditions. The key city-forming enterprise in Muravlenko is RN-Purneffegaz LLC, a subsidiary of Rosneft, which is responsible for field operations. By the 2000s, Muravlenko had become the center of oil production in the Purovsky district, accounting for up to 12% of regional hydrocarbon extraction. Examples of the soils found in Muravlenko can be seen in Figure 6.  
Mature soils include podzols, entic soils, cryotubated soils (O-Etur-BFtur-C), and folic arsenic soils (O-C). In this case, urban soil is presented by an example from a residential area. Technosol Arenic is the soil of the residential area (AY-RAT-C). This soil demonstrates tactile features and well-expressed stratification of the solum due to the limited transportation of sandy material. Tarko-Sale is the administrative center of Purovsky District in the Yamalo-Nenets Autonomous Okrug. It is located at the confluence of the Pyakupur and Aivasedapur Rivers, on the right bank of the latter. The city's history is inextricably linked with the development of oil and gas fields in Western Siberia. Founded in 1932 as a temporary settlement, Tako-Sale acquired city status in 2004, reflecting the typical Arctic urbanization pattern driven by industrial resource extraction. Geomorphologically, the area is characterised by flat terrain with extensive wetland complexes and a dense network of lakes and small rivers. Forest-tundra landscapes predominate, with narrow strips of coniferous forest forming alongside bodies of water. The city's core enterprise is the LLC RN-Purnetfegaz company. Tarko-Sale has a population of around 19,000 people.