| 释义 |
▪ I. overfit, a. Physical Geogr.|ˈəʊvəfɪt|
[f. over- 28, after misfit.]
Pertaining to or designating a stream which, if its average flow in the past was at present-day levels, would be expected to have eroded a larger valley than it has done.
1913Ann. Assoc. Amer. Geogr. III. 18 Conversely, the capturing branch, AB, and its river, BD, below the entrance of the capturing branch, being increased in volume, should exhibit for a time an overfit relation to their valley curves, in the sense of actively enlarging them. 1954W. D. Thornbury Princ. Geomorphol. vi. 156 It is difficult to cite examples of overfit rivers, or streams with floodplains too small for the size of the stream. Hence there may well be a question whether overfit streams exist. The reason..may be that a stream cannot long remain overfit, for an increase in volume will be accompanied by increased erosive power and rapid adjustment of valley size. 1968R. W. Fairbridge Encycl. Geomorphol. 706/2 Davis..also recognizes overfit streams.
▪ II. overfit to overflag:
see over-. |