Let $\mathcal H$ be a hereditary abelian category over field $k$ with finite-dimensional Hom and Ext spaces. It is proved that the bounded derived D^b(\mathcal H)$ has silting object iff tilting $\mathc

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-frac...

Blind, through, combined transverse dams are widely used as regulation structures to protect riverbanks and regulate river channels. Under the influence of these structures, a redistribution liquid solid runoff, including suspended sediments, occurs. This article aims develop method for forecasting mud silting vortex zone behind dam. The concept coefficients siltation in width, area, volume is ...