The researches combining a social, economic and ecological content, find out a generality of appendix area and global purpose. This purpose image is hidden behind the term "sustainable development". These restrictions are presented as the multiplicative index of the development. This index is reflecting an information balance of a territory.The level of the Caspian Sea, the largest inland sea in the world, has fluctuated capriciously in history, with amplitudes up to 3 m in the last century, to 25m in the last millennium, and to over 150m since the Last Glacial. The results suggest that the last major highstands occurred around 2600 BP and in the Little Ice Age and coincide with global cooling events associated with minima in solar activity. This suggests that millennial precipitation changes in the Volga River drainage basin are also forced by solar activity.Исследования, включающие в себя социальное, экономическое и экологическое содержание, выявляют общность сопутствующих областей и глобальной цели. Эта цель скрыта за поняти-ем "устойчивое развитие". Эти ограничения представлены как мультипликативный индекс развития. Этот индекс отражает информационный баланс определенной территории. Уровень Каспийского моря, наибольшего внутреннего моря в мире, сильно колебался в течение своей истории, с амплитудами до 3 м в прошлом столетии, до 25 м в последнем тысячелетии, и до более150 м начиная с Последнего Ледникового периода. Результаты показывают, что послед-ние главные наслоения произошли приблизительно в 2600 г. до н.э. и в Малом Ледниковом периоде и совпадает с глобальным охлаждением, связанным с минимумами в солнечной ак-тивности. Это позволяет предположить, что тысячелетние изменения осадков в волжском речном бассейне также вызваны солнечной активностью.Ключевые слова: солнечная активность, наслоения, Малый Ледниковый период, Каспийское море
The palaeo-Volga River valley existed within the present-day Lower Volga region during the last 600-700 ka. Its lower parts periodically transformed into a long and deep ingressional estuary with the apex location controlled by the amplitude of the Caspian Sea level rise. Between the Early Khvalinian highstand of +50 m and the Early Holocene Mangyshlak lowstand at -100 m, the apex of the Volga Delta has wandered 700 km alongstream. The estuarinemarine and alluvial environments in the ingressional estuary in the area between the present-day cities of Volgograd and Astrakhan, were changing throughout the entire Late Pleistocene and Holocene. The associated succession reflects a complex history of the Caspian Sea level oscillations. Only over the last 16 ka, there have been six marine (estuarine) phases within the Volga-Akhtuba valley correspondent to the Late Khvalinian and Novocaspian transgressions. The transgressions alternated with regressive phases associated with the dominance of alluvial environments in the Lower Volga valley. There are pronounced traces of three transgressive-regressive phase alternations of the Late Khvalinian and Novocaspian ages in the modern Volga-Akhtuba floodplain topography, that correlate with four generations of ancient floodplain and delta surfaces distinguished in this study. Surfaces of different age generations differ in absolute and relative heights, morphological types of floodplain topography, and present-day vegetation.
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