Influence of the Natural Landscape Conditions of Northern Yakutia on Flood Formation on the Alazeya River

Abstract

The article assesses natural landscape conditions for forming floods on the Alazeya river and their influence on the hydrological regime. Evaluation of the moistening mode showed that an increase in the water volume is caused by an increasing amount of precipitation. The factor determining variability of the annual river flow is precipitation in the warm period of the previous year. The degree of susceptibility of the river landscapes to various changes was assessed. Permafrost, climatic and biological indicators (ice content of surface sediments, temperature of frozen rocks, biological productivity, conditions of heat supply and moisture) were taken into account. It was determined that tundra and northern taiga lake-thermocarstic landscapes are susceptible to anthropogenic effects.

Hydroelectric resources of minor rivers in areas of compact settlement inhabited by low-numbered peoples of the north

“…Maximum flow modules on rivers with catchment areas of 1000 km 2 or more can reach 300 l/sec. [5]. The observed maxima are 30-50 times higher than the average annual runoff.…”

“…The maximum rise in water level reaches in the first half of June. Its duration is 30-40 days [5]. Maximum flow modules on rivers with catchment areas of 1000 km 2 or more can reach 300 l/sec.…”

“…The volume of high water does not exceed 10-15 mm there, and the annual flow -40-50 mm. The maximum flooding modules of summer floods on rivers with catchment areas of 500-600 km 2 are 100 l/sec [5].…”

“…Conclusions: 1. The cutoff one of the numerous bends in the lower reaches of the Ilin-Billekh will create a difference in the height of water levels [5].…”

“…2. On the Ilin-Billekh, even with low water content, the power of microelectric power plants can be 30-40 kW [5].…”