Knee pain and popping is a common problem and can be caused by a number of factors. Another term commonly used for popping in the knee is Crepitus, which essentially means a noisy joint, whether it be popping, clicking, cracking or snapping.
The final type of erosion is attrition. Attrition is a way of eroding the riverâs load, not the bed and banks. Attrition is where pieces of rock in the riverâs load knock together, breaking chunks of rock off of one another and gradually rounding and shrinking the load.
Attrition is a gradual process of wearing down, weakening, or destroying something. When a company wants to reduce its payroll without firing anyone, it will sometimes do so through attrition; that is, by waiting for people to retire or quit without hiring anyone new to replace them. In a more general sense, the word means break down, wear out, or reduce in numbers.