13 List the reasons given in the video for why stream velocity generally increases withdistance downstream14 First, give the definition of a hydrograph. (Note that while this video shows a period ofmonths on the x-axis, hydrographs can be generated for any time period.) The graphbelow 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-axisrepresents discharge in units of cubic feet per second (although not metric, this is a unitfor streamflow commonly used by the US Geological Survey). Using the diagram, locatepeak discharge on this hydrograph and estimate the approximate magnitude (amount) ofthis discharge, as well as the approximate minute since the start of the storm event thatthis peak discharge occurred. (4 pts)USGS 02203950 (December 28, 2012)Discharge (CFS)2502001501005000 500 100015002000 2500 3000 3500 4000Time (minutes)4500

Answered: 13 List the reasons given in the video…

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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Question

13 List the reasons given in the video for why stream velocity generally increases with
distance downstream
14 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 hydrograph and estimate the approximate magnitude (amount) of
this discharge, as well as the approximate minute since the start of the storm event that
this peak discharge occurred. (4 pts)
USGS 02203950 (December 28, 2012)
Discharge (CFS)
250
200
150
100
50
0
0 500 1000
1500
2000 2500 3000 3500 4000
Time (minutes)
4500

Expert Solution

Step 1

According to the Bradshaw Model, the average speed or mean velocity of a river (measured in meter per second) will always increase with distance along its channel which is because a river tends to become deeper, wider and also have a higher discharge the further downstream it moves.