If the width of a stream channel is 100 feet, and its depth 50ft. how fast water
ID: 288500 • Letter: I
Question
If the width of a stream channel is 100 feet, and its depth 50ft. how fast water be moving to achieve a discharge of 47.000 ft3/sec? A. 47 ft/sec B. 10.6 ft/sec C. 9.4 ft/sec D. 100 ft/sec 2/26/2018 must the 19. Emergent Coastlines often have features such as: A. Marine terraces B. Drowned river valleys C. Narrow beaches D. streams 20. Refer to fig. 5 The slope angle of C lies in the range A. 20-3o degrees B. 45-60 degrees C. 90 degrees and above D. 2-10 degrees 21. What is not a feature on a submergent coastline? A. Saltmarshes B. No answer choices are correct C. Wave-cut clif D. Estuary 22. If the picture (fig. 8) represents groins on a beach, what direction is the longshore current flowing? A. S to N B. N to S C. E to w D. W to E 23. A branch or tree like drainage pattern is known as: A. Dendritic B. Prismatic C. Radial D. RectangularExplanation / Answer
18) Area of cross section of the channel = Width * Depth
= 100 ft * 50 ft = 5,000 ft^2
Discharge = 47,000 ft^3/sec
Speed = Discharge/Area of cross section of the channel
= (47,000 ft^3/sec)/ (5000 ft^2)
= 9.4 ft/sec