If a 20 mph wind steadily blows from the northwest over Lake of the Woods (Minne
ID: 106183 • Letter: I
Question
If a 20 mph wind steadily blows from the northwest over Lake of the Woods (Minnesota/Ontario) and over Lake Bemidji (Minnesota), which lake will produce the largest waves and why (use the proper term). At what water depth will a wave with a length of 13 feet first disturb bottom sediment? Explain. Why do waves become crowded together as they approach a shore? Notice in figure 20.10 that waves begin to bend offshore in front of, and prior to reaching, the headland. What's making the waves do that? This involves deduction and consideration backward in time. That is. I suggest you rewind this coastal view to visualize a time when waves would not have been refracted, and then move forward from there. In other words, yes, there is a shallowing, but what caused it? Longshore drift refers to the movement of sediment parallel to the shoreline, within tin? surf zone. What specifically is beach drift? Explain it, using a diagram and in words. Why are sea cliffs common along the west coast of North America but uncommon along the east coast? Explain your answer. Show that you can teach someone about (1) groins, (2) offshore breakwaters, and (3) how they disrupt the dynamic equilibrium of shorelines. In other words, explain their consequences. Include simple sketches that reveal the coastline processes that must be considered. I've provided an animated GIF about groins in the lesson notes, but you must nuke your own sketch for offshore breakwaters. What well-known Texas city is built on a barrier island? Name 3 barrier islands Name 3 barrier islands along the Texas coast. Which is the longest, and how long is it? How does the watering of lawns by people living atop sea cliffs along coast affect the stability of those cliffs? How do dams on rivers affect coastlines?Explanation / Answer
3. Why do waves become crowded together as they approach a shore?