Quantifying the actual sediment load flux into Lake Baikal:A case study of the main tributary e The Selenga River(Russia)  

作　　者：Tatiana Potemkina Vladimir Potemkin 

机构地区：[1]Limnological Institute of the Siberian Branch of Russian Academy of Sciences,Irkutsk,664033,Russia

出　　处：《International Journal of Sediment Research》2022年第2期238-247,共10页国际泥沙研究（英文版）

基　　金：Ministry of Education and Science of Russia,State Project of Limnological Institute Siberian Branch of Russian Academy of Sciences(Grant No.0279-2021-0005).

摘　　要：The significant reduction of sediment load flux into Lake Baikal from its main tributary e the Selenga River began in the mid-1970s,and can be explained by climate change and socio-economic activities.Integrated analysis was done of changes in hydro-meteorological parameters(water discharge,sediment load,air temperature,and precipitation)and their tendencies over periods of 1946-1975(baseline)and 1976-2017(warming).Changes in natural processes and human activity were negligible during the baseline period.In the warming period,against the background of an increase in temperature,the water discharge had a slight decreasing trend(-13%)whereas the sediment load has significantly decreased(-53%)these are consist with the precipitation change(-9.4%).Analysis of hydro-climatic data using statistical methods showed that in the warming period the greatest reduction in river sediment runoff occurred in the interval 1996-2017.In this period the sediment load was 768×10^(3)t/yr,which is less than the average value during the warming period e 1048×10^(3)t/yr.Considering sedimentation in the Selenga River delta,the actual sediment load flux from the Selenga River into Lake Baikal amounted to 515×10^(3)t/yr,which is three times less than the average multiyear value 1535×10^(3)t/yr for observation period(1946e2017).

关 键 词：Sediment load Climate change Human activity Selenga River Lake Baikal 

分 类 号：TV142[水利工程—水力学及河流动力学]