Advantages: The author of graduating work demonstrated a deep knowledge and understanding of a wide range of issues related to the estimation of the dynamics of glacier volume. Author covers physical basis of the processes occurring in the glaciers, technical aspects of how to organize and conduct unmanned aerial photography surveying, photogrammetric processing of measurement results, and finally, GIS analysis of the data. Work is written in good style, that leaves no doubt that author fully understands every step and nature of every problem.  Disadvantages: Some errors in text stylistics.  Conclusion: Volgusheva Natalya has the knowledge and skills that allowed her to execute graduation work on a very high level. The work covers a wide range of different tasks, and they are all adequately described and solved. The author participated in expeditionary works, processed the results of field measurements, and finally formulated the method of conducting unmanned aerial photography survey of valley glaciers in mountainous conditions in order to calculate the volume of a flock of snow and ice during the ablation period. The reviewer regrets that the available number of gradations to assess the quality of works of students is limited to five. Choosing from the available set of marks, the reviewer, of course, chooses "Excellent".  Reviewer: PhD, senior researcher of Scientific Foundation “Nansen International Environmental and Remote Sensing Centre” Elena V. Shalina