SELF-ORGANIZATION OF STRUCTURE OF WATER EXCHANGE AS A SYSTEM-FORMING PROPERTY OF KARST

• Дата: 2011
• Автор: KLIMCHOUK, A. B.
• Формат: Стаття
• Мова: rus
• Опубліковано: Institute of Geological Sciences, NAS of Ukraine 2011
• Теми: Water exchange; karst; self-organization; karst geosystems; Водообмен; карст; самоорганизация; карстовая геосистема; Водообмін; самоорганізація; карстова геосистема; 551.44
• Онлайн доступ: http://geojournal.igs-nas.org.ua/article/view/139206
• Назва журналу: Geological journal

The paper demonstrates that the presence of soluble rocks in the rock environment causes a phenomena of self-organization of the flow structure, which brings the water-rock system into a new capacity-state, namely - karstic. The property of self-organization of this geosystem realizes via specific (speleogenetic) mechtanism of permeability development, which action radically changes (organizes in a special manner) the structure and functioning of the flow system.The mechanism of self-organization of flow and of the formation of the karst geosystem (speleogene-sis) includes a positive feedback between flow and the rate of enlargement of initial flow paths during stages of early speleogenesis and conduit iniciation, a cascade breakthroughs of proto-conduits to conditions of rapid growth (destabilization of the system, hydrodynamic competition of conduits, reorganizattion of the flow pattern and change in boundary conditions, further growth of conduits in conditions of stabilization of the system at dynamic equilibrium at the expense of increased energy exchange with the environment. As a result of this specific evolution the geosystem acquires a new, "karstic", capacity and more complex organtization, with the establishment of one more level of permeability, the most contrast one.The notion of karst is derived from the essence of progressive evolution of the geosystem containing permeable soluble rocks, driven by water exchange and speleogenetic mechanism of self-organization of the permeability structure. Regressive evolution of the karst geosystem includes processes of gravitational destruction and various accumulations, which lead to fragmentation and demolition of relict structures of karst permeability. Based on this new approach to definition of the notion of karst, criteria of distinction between proper karst and similar but not identical phenomena (merokarst, pseudokarst) are discussed.