Geology, geography and global energy

Scientific and Technical Journal

2017. 3, pp. 205-216

Valov Mikhail V. - post-graduate student, Astrakhan State University, 1 Shaumyan sq., Astrakhan, 414000, Russian Federation, m.v.valov@mail.ru

Barmin Aleksandr N. - D.Sc. in Geography, Professor, Astrakhan State University, 1 Shaumyan sq., Astrakhan, 414000, Russian Federation, abarmin60@mail.ru

Barmina Yekaterina A. - post-graduate student, Astrakhan State University, 1 Shaumyan sq., Astrakhan, 414000, Russian Federation, m.v.valov@mail.ru

Grachev Denis S. - student, Astrakhan State University, 1 Shaumyan sq., Astrakhan, 414000, Russian Federation, m.v.valov@mail.ru

Large areas of the Caspean sea lowgroundare covered with meadow alkaline soils, which spread in the form of separate contours in the complex with other soils. Meadow alkaline soils are actively involved in agriculture resulting from high population density in deltoid territories, that's why the main factor is organization and soil-plant monitoring conduction on these territories, the importance of which is defined by agricultural, conservational and ecological tasks solution. Especially active development of meadow alkaline soils on the Caspean sea lowground territory occurs in estuarine rivers natural systems, the largest of which is the river Volga. Construction and putting into operation cascade hydroelectric power station on the river Volga led to the hydrological regime change, in conjuction with meteorological condition changes, it has an impact on visual environment soil-plant component of deltoid region. Monitoring investigations results of hydromorphic alkaline soil landscape and the river Volga delta plant stand in the period of 1982 till 2016 are presented in this work. Ecosystem impact analysis of hydrological (annual average volume of aqueous run-off and volume run- off for the second quarter), some meteorological ( annual average air temperature, air temperature and falling precipitation quantity for foliated season) factors on chemical constitution dynamics and total content in water-soluble salt soils, soil solution toxic level, on productivity, species composition and meadow alkaline soil phytocenosis structure in the middle part of the river Volga delta was carried out.

Key words: , . , , , - , the Caspean sea lowground, the river Volga delta, hydromorphic alkaline soil, hydrometeorological conditions, soil-plant stan

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