IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT : Dependence of Sediment Delivery Ratio on Scale and Its Fractal Characteristics
Dependence of Sediment Delivery Ratio on Scale and Its Fractal Characteristics
Author : Xiaoming Zhang, Sihong Wu and Wenhong Cao
Sediment delivery ratio (SDR) is an indicator to demonstrate the capacity of erosion and sediment delivery of a certain basin. Based on systematic review on SDR studies at home and abroad during the last 50 years, this paper analyzed and discussed whether SDR has dependence characteristics on scale or not and its fractal characteristics. It was concluded that (1) the definition of SDR formula has embedded in the characteristic of scale; (2) SDR in different watersheds at home and abroad showed correlations with certain temporal and spatial scales, which means SDR depends on its scale; (3) SDR could be quantitatively expressed and be scaling using fractal dimension under a certain temporal and 2 spatial scale. The authors were firstly found that values of SDR and fractal dimension (D) at 1 km typical ' watershed unit were approximately equal to the coefficients namely S and D in the corresponding DR '- D scaling model ( S = S F ).This paper also pointed out that the study and calculation of SDR cannot be DR DR correct without considering its scale dependence. It is a valid and useful approach to construct SDR scaling models by using fractal dimension, which could be an interesting research topic regarding on SDR scaling in the future.
File Size : 306,224 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Article : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT
Date Published : 18/07/2016
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