accordant

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adjective

In keeping with one's needs or expectations: agreeable, compatible, conformable, congenial, congruous, consistent, consonant, correspondent, corresponding, harmonious. See agree/disagree.

Complying with. Thus, accordant drainage is drainage which has evolved in conformity with the underlying geological structure, so domes show a radial pattern, and trellised patterns develop on gently dipping scarp lands, for example. The law of accordant junctions (Playfair's law) states that tributaries join a stream or river at the same elevation as that of the larger watercourse; thus there is no sudden ‘drop’ in the level of the tributary. This means that tributaries are graded to the level of the junction. Accordant summits are hill or mountain tops of approximately the same elevation. The presence of accordant summits has been seen as confirmation of the theory of the cycle of erosion.