Figure 1: Anthropogenic impacts, including altered land cover and hydromodification, drive physical,
hydrological, chemical, and biological riverine response at the basin scale; these changes trickle down
through the watershed scale, the stream scale and finally to reach-scale impacts on habitat and biota.
1 Hydromodification includes anything that modifies/disrupts the flow of water or aquatic animals
(i.e., dams, culverts, weirs, armored banks, levees, ditches).