Describe coastal effects of removing sediments from a stream, as is done during mining
What will be an ideal response?
ANSWER: Removal of sediments from a stream often has consequences far from the site of removal, where a river deposits its sediment at the coast. Normally, much of the sediment deposited in the river delta is carried up or down the coast by longshore drift. When the sediment supply is reduced because of gravel mining or an upstream dam, the longshore movement of sediment along the coast continues but is not replenished. Beaches erode and may even disappear. Waves that normally break against the beach then break against the beach-face dunes or sea cliffs, causing severe erosion.?
You might also like to view...
A hospital, the Lake Wales Medical Center, is shown south (SSE) of Lake Wales. Determine the elevation of the hospital as well as the elevation of the lake surface of Lake Wales.
Hospital: ______________ Lake Wales: ______________
What is declination?
A) the angle of decrease of the axis of rotation in relation to latitude B) the horizontal angle between the magnetic and geographic north poles C) the vertical angle between the field-force line and Earth's surface D) the angle of increase of the axis of magnetism in relation to latitude
Perhaps the most difficult oceanic habitat is/are ____.?
A) ?the abyssal zone B) ?intertidal coarse sand and cobble beaches C) ?intertidal rocky shores D) ?the epipelagic zone
Which of the following is true about tests we can perform on a mineral?
A. many common minerals react (effervesce) with dilute hydrochloric acid B. a streak plate is used to determine how hard a mineral is C. many minerals are strongly magnetic D. a softer mineral will scratch a harder mineral E. None of these choices are correct.