SUBLIMATION OF LOWER-ALTITUDE GLACIERS IN THE VILCABAMBA MOUNTAIN RANGE (CUSCO-PERU)
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Abstract
This research on the glacial retreat of the Oq'obamba and Moyoq snow-capped mountains (East side of the Vilcabamba mountain range) and its implications for the water availability of the Lechería and Colorado (Limatambo) river basins during the period from 2000 to 2015, has revealed that the glaciers of the aforementioned snow-capped mountains not only retreat, but also fragment, encapsulate, shrink, and sublimate; they no longer melt. Therefore, they visibly do not contribute any water flow to their receiving basins. The main objective of the research was to determine the relationship between glacial retreat and water availability in the direct receiving basins monitored at the Puente Kunyaq hydrometric station during the period 2000 to 2015. Both variables were subjected to correlation analysis, obtaining a Pearson correlation coefficient of rxy=0.467, deducing that there is no significant relationship between glacial retreat and water availability. The results of the research indicate that with a greater increase in ambient temperature, the Altitudinal Equilibrium Line (ELA) is rising to altitudes above 5030 meters above sea level, calculated for the year 2012, and with it the fragmentation, encapsulation, sublimation, and disappearance of glaciers in the Vilcabamba mountain range.
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