The image is a picture, but the source is not listed -presumably it is the author of the piece. The composition places the storm water drain right at the centre, drawing attention to it. As a black hole in an otherwise familiar-looking landscape it evokes the uncertainties and threats of the toxic flows that may be seeping into the river at this site.
Unclear, although I assume it is created by the ethnographer. It’s centering of the drain, which lies under some kind of road or overpass, seems to underline the forgotten nature of the pathways of chemical toxicity. (Especially in relation to the first image, whose depiction of the former factory site also feels lonely and abandoned). The choice of season also enhances this aesthetic, depicting the landscape as barren in a particular way.