Impact of Floods on Sediment Trap Efficiency of a Small Shallow Reservoir—A Case Study

Silting is the main factor limiting ability to perform tasks that small reservoirs are intended for. Therefore, change in sediment trap efficiency was studied for a shallow reservoir, Krempna, which, due high silting intensity, desilted twice (2005, 2018). Siltation measurements were performed two periods (1987–2005, 2006–2018) after reservoir desludged. It found sediments composed of fine-fraction sediment; therefore, series suspended transport performed. These data allowed us calculate daily flowing into and out water-level measurements. Then, calculated. The aim this study was: (1) determine impact flood flows on (STE) (2) changes value different its operation, (3) demonstrate whether it possible initial STE values during operation using empirical formulas. Finally, flows, amount retained several times lower than freshets with much smaller flow. these reduce capacity reservoir. A correlation relationship developed 18 data—flood (Q) (STE).