The relationship between sediment delivery ratio and stream order: a Romanian case study.

I. Ichim, D. E. Wallings, A. Yair, S. Berkowicz

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

1 Scopus citations

Abstract

An investigation of sediment delivery ratios in three regions of Romania (Moldavian Tableland, Subcarpathians and Flysch Mountains) showed a inverse relationship between sediment delivery ratio and drainage basin order (Strahler's system). However, these relationships varied in their precise form. There were two main controlling factors, namely, rock erodibility and runoff regime. When the rocks are easily eroded and the small head-water catchments evidence runoff of torrential character, the sediment delivery ratio decreases markedly with an increase in river network order. This is the case in the Moldavian Tableland, where the foot hills are a zone of active colluviation. When the rocks are easily eroded, but the runoff is greater, high sediment delivery ratios exist. This is the case in the Subcarpathians. When the rocks are resistant to erosion and the runoff is also high, the relationship between sediment delivery ratio and drainage basin order exhibits a more moderate slope, as shown by the Flysch Mountains. (A)

Original languageEnglish
Title of host publicationUnknown Host Publication Title
PublisherWallingford, U.K., International Association of
ISBN (Print)094757137X, 9780947571375
StatePublished - 1990

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