The article examines the development of a synergistic paradigm in the Earth sciences, in particular in geotechnics and engineering hydrogeology. It was determined that in the second half of the 20th century, as a result of changes in scientific methodology, there was a need to rethink linear approaches to the study of natural systems. Synergetics, as a science of interaction and self-organization of complex systems, became the basis for new scientific directions, in particular in the field of geosystems and hydrogeotechnical systems research. The work emphasizes the importance of introducing synergistic principles into geological and hydrogeological research, particularly in the context of dynamic processes, such as filtration in hydrogeosystems. It is shown that these processes, in particular in the regimes of hydrodynamic, hydrochemical and hydrothermal changes, have a non-linear nature and can be described by appropriate mathematical models. The work also covers the issue of the influence of climatic and anthropogenic factors on the state of groundwater and soil, which is important for the design of buildings and infrastructure in various regions. The mechanisms that affect the stability of hydrogeosystems, as well as their possible critical states, which can lead to turbulence or irreversible changes in the structures of water-bearing rocks, are considered separately. An important aspect is the human impact on these systems, which can be both directed and accidental, which emphasizes the need to consider synergistic effects to improve natural resource management and minimize negative environmental impacts. The article is aimed at highlighting the potential of synergy in the study of hydrogeotechnical systems and the need for its application in engineering and environmental protection practices. This information will be useful for engineers, geologists, hydrogeologists and students of relevant specialties, as well as for those engaged in research in the field of geotechnics and hydrogeology.
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