In this excerpt I see examples of fragments, wet/dry, and exile. “The river’s tent is broken” suggests the presence of fragments, though I’m not familiar with Eliot’s reference here and what the “river’s tent” is meant to be. The “empty bottles, sandwich papers, silk handkerchiefs, cardboard boxes, cigarette ends” are all things that are left over from something else; they are the results of bottles containing drinks, sandwiches, cigarettes, packages, etc. and they are all now fragments of a whole thing. I think these things can also fit into the motif of wet/dry, because they are dry objects which are not meant to be submerged in water. Though the lines state that the river does not bear these things, the very concept of trash within the water fits wet/dry. “Wet bank” vs “brown land” also illustrates wet vs dry. The lack of trash in the water also suggests the concept of exile. No one is around to litter, the “nymphs are departed,” and their friends are also gone without leaving any clues as to where they went. I believe the significance of these motifs in this section are that they mean to show how barren the land and river now are. There is no sign of life: no nymphs, no trash, only fragments and dichotomies.