Using GPR for assessing the volume of sediments from the largest natural dam lake of the Eastern Carpathians: Cuejdel Lake, Romania

摘要: Cuejdel Lake in the Eastern Carpathians (Romania) formed 1991 following damming of Cuejdiu brook from torrential rainfall causing a massive landslide natural deposits. In 2011, using Bathy-500DF Dual Frequency Hydrographic Echo Sounder, first detailed bathymetric model lacustrine cuvette was produced, more than 45,000 depth readings. This ever use Ground Penetrating Radar (GPR—a Mala Ramac X3M GPR with 100 MHz antenna) Romania for evaluating rate clogging dam lake. The thickness alluvial deposits and were determined on basis measurements taken wintertime, when ice cover 30–45 cm. data concerning correlated solid transport level catchment basin developed flysch area, sedimentation conditions lake (the analysis annual non-glacial varve, situ biodegradation). morphologic evolution cuvette, three DEMs, revealed significant quantitative dynamics (sediment accumulation 1–16 cm/year; volume sediments across levels 33.6–440.4 m3/an; total accumulated 22 years 103,988.87 m3, which represents 8.5 % initial (1,223,001.33 m3); average 4521.26 m3/year or 0.36 %/year). 2004, declared protected area; accordingly, no hydrotechnical works can be carried out order to stop erosion and, implicitly, clogging.