CHANGES IN THE FLOW OF RIVERS OF THE CRIMEAN PENINSULA IN THE SECOND HALF OF THE XX – EARLY XXI CENTURIES

Authors

  • Victor A. Obyazov 1Scientific and Industrial Research Association Gidrotehproekt, Valday, Russia;2Water Problems Institute, Russian Academy of Sciences, Moscow, Russia; 3Russian State Hydrometeorological University, Saint-Petersburg, Russia
  • Alexey Yu. Vinogradov Scientific and Industrial Research Association Gidrotehproekt, Valday, Russia; Water Problems Institute, Russian Academy of Sciences, Moscow, Russia; Saint Petersburg State Forest Technical University, Saint-Petersburg, Russia

DOI:

https://doi.org/10.34753/HS.2022.4.1.38
+ Keywords

Crimea, river runoff, cyclicity, trends, water withdrawal, anthropogenic impact

+ Abstract

Crimea belongs to the regions with a significant shortage of water resources. Therefore, 23 reservoirs and about 2,000 irrigation ponds have been created in Crimea to provide water supply to settlements, industrial and agricultural enterprises. Under these conditions, an important issue is the rational use of river flow, including consideration of the regularities of its spatial and temporal distribution. Due to a rather contrasting division of the peninsula's territory into mountainous and plain parts, the spatial distribution of runoff is extremely uneven. The highest values of the average annual modulus of river runoff (more than 20 l/s·km2) are observed in mountain areas and the lowest ones (about 0.1 l/s·km2) – in steppe areas. There is a significant impact on the river flow of water withdrawal for various needs, which is comparable with the remaining water discharge after it, and in some cases even exceeds them. Multiyear changes in runoff occur in all rivers of the Crimea in a fairly consistent manner. The correlation coefficients between the series of average annual water discharge in all cases are statistically reliable. Cyclicity is revealed in the fluctuations of the annual runoff. Statistically reliable rhythms lasting 7–8 years are observed on many rivers with a long observation period. Divergent trends have been noted in the flow regime of the rivers of the Crimean Peninsula. The greatest increase in the average annual flow rates occurred in the plain part of the Salgir River basin. On most rivers of the western slope of the Crimean mountains, the average annual water discharge has decreased. Increased flow of the rivers of the Salgir basin is not confirmed by the regime of atmospheric precipitation, in which there is no positive trend and its increased values in the 1990s and early 2000s, which is clearly evident in the flow regime of these rivers. The identified trends of flow changes in many other rivers cannot be recognized as natural, because most of the rivers of the Crimean peninsula have a significant anthropogenic impact.

+ Author Biographies

+ References

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Published

2022-10-01

How to Cite

Victor A. Obyazov, & Alexey Yu. Vinogradov. (2022). CHANGES IN THE FLOW OF RIVERS OF THE CRIMEAN PENINSULA IN THE SECOND HALF OF THE XX – EARLY XXI CENTURIES. Hydrosphere. Hazard Processes and Phenomena, 4(1), 38–51. https://doi.org/10.34753/HS.2022.4.1.38

Issue

Vol. 4 No. 1: Hydrosphere. Hazard processes and phenomena

Section

The evolution of the hydrosphere

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