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In law, a situation in which the amount of land on a property increases or decreases due to a sudden (not a gradual) action of water. For example, a flood changing the course of a river may result in avulsion. Depending on the laws of the jurisdiction in which it occurs, an avulsion may or may not change property lines or even government borders.


A sudden and perceptible loss or addition to property as a result of the action of water either taking soil from one property and leaving it on another,or by virtue of a river or other running water changing the course of its bed.The rule is that boundary lines described with reference to the midpoint of the stream will remain at the midpoint of the old stream, and not the midpoint of the new stream. This is because of the sudden nature of the change, so that people may reasonably notice and mark the location of the old stream bed as a matter of reference.

References in periodicals archive ?
Ligamentous avulsion of the ulnar collateral ligament of the thumb of a child.
A remarkable number of injuries were subsequently discovered on MRI following radiographic observation of an avulsion fracture of the proximal fibula.
Current advice on the management for avulsion and root fractures in the permanent dentition are shown in Tables 1 and 2.
A positive association between the age and the presence of alveolar fracture, avulsion, facial fracture and site of trauma was observed.
Minimally displaced avulsions are treated conservatively with rest, ice, and immobilization with bed rest and a hinged knee brace.
Humeral avulsion of glenohumeral ligaments as a cause of anterior shoulder instability.
Avulsion fracture of the coracoid associated with acromioclavicular dislocation.
Patients are usually tender along the proximal medial border of the thigh, and a defect may be palpable in the rare cases of a tendon avulsion.
As the river channel aggrades and channel gradients become increasingly steep, avulsions (natural break-outs) occur, or, in some instances, human breaches of dikes and lev4es (Cen 1957; Hsu 1980: 103; Xu, Fuling 1989; Wang, Yulei 2008).
CPSC staff estimates from its 2007 and 2008 study of emergency department treated injuries related to table saws, that consumers suffered, on average, about 11 fractures, 11 amputations, and 8 avulsions every day from contact with the saw blade.
Braving large aftershocks amid the devastation and with extremely limited medical supplies and conditions as austere as any battlefront medical unit, he immersed himself in treating and caring for over 300 critically wounded patients with injuries ranging from compound fractures to crushed limbs, traumatic amputations and avulsions, and paralyzing spinal injuries.