Main channel is flowing water has average change occurs. Delta/Mouth is the wetlands that form that deposit its water and sediments into larger bodies of water like the ocean. 10) Please explain how sediment grain size changes from the headwaters to the mouth of a river system. Make sure to include how water velocity is involved with this. (4 pts) It goes from boulders, pebbles and gravel to sand, then silt clay. The central section of the stream will have sediments which include clay, gravel. 11) Pause the video at the Hjulstrom Diagram presented at 3:54 and predict what will happen (at a flow velocity of 1 cm/second) for clay, silt, sand, and gravel (i.e., whether each of these will be transported, eroded, or deposited, or a combination). (4 pts) clay and silt would be the only ones moving towards the middle of the stream. gravel and sand requires higher speed in order to transfer. So gravel and sand wouldn’t move but clay and silt would. List the reasons given in the video for why stream velocity generally increases with distance downstream (4 pts) Roughness of channel and the increased channel size 12) First, give the definition of a hydrograph. (Note that while this video shows a period of months on the x-axis, hydrographs can be generated for any time period.) The graph below shows a hydrograph for a single storm event at Snapfinger Creek near Decatur, Georgia. The x-axis represents minutes since the start of the storm event. The y-axis represents discharge in units of cubic feet per second (although not metric, this is a unit for streamflow commonly used by the US Geological Survey). Using the diagram, locate peak discharge on this