Randomized Controlled Studies: This is a study in which 1) There are two groups, one treatment group and one control group. The treatment group receives the treatment under investigation, and the control group receives either no treatment (placebo) or standard treatment. 2) Patients are randomly assigned to all groups.
winds that blow in a steady direction can move a dune. such wind will consistently pick up sand from one side and deposit it to a other side. this causes the entire dune to s â¦ lowly move in the direction if the wind.
One of the most noticeable effects is seen in sand dunes. The sand will move wherever the wind takes it--burying oases and ancient cities along the way. Factors of Erosion by Wind: Aridity of Climate: The less rainfall, the more opportunity for erosion caused by wind. Wind Speed: Erosion increases with strong winds or gusts