Express-Diagnostics of the Recharge Sources of a Small Arctic River by the Results of Short-Time Hydrological Survey, Chaunskaya Lowland, ChukotkaстатьяПеревод
Статья опубликована в журнале из списка Web of Science и/или Scopus
Аннотация:The article gives the results of generalization of a short-time expedition hydrological–hydrochemical survey in an arctic river basin in the northeastern part of Chaunskaya Lowland in the northern Chukotka, carried out in July 2020. At a scale of a small Yanranaivaam River basin, the structure of water masses was analyzed, and the drainage basins of tributaries with intense development of cryogenic processes were identified; these processes have an effect on water chemistry, in particular, in a higher concentration of hydrocarbonate ions, dissolved iron, and dissolved organic carbon. Two-tracer mixing model was used to determine and evaluate the contributions of recharge sources and their spatial relationships at the moment of survey. The main recharge sources are atmospheric waters (mostly snowmelt water), slope soil water of the seasonally thawed layer (STL), and melt water of bald-mountain ice. The dominating water source in the catchments of the middle and upper parts of the basin is atmospheric water (67–78%), and that in the catchments of the lower part of the basin is STL soil water (59–64%). River recharge by meltwater of bald-mountain ice is typical of the entire basin, and at the moment of survey it accounted for 10–14% of the total.
