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Over annual to centennial timescales

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Over annual to centennial timescales, anthropogenic activities, such as deforestation and pollution, can create signals that become stored in sedimentary sinks (e.g., Paull et al., 2002 and Cundy et al., 2003). Many natural and human factors (e.g., land use, dams) have significant influence on NBD-556 yields and loads (Meade et al., 1990, Syvitski et al., 2005 and Milliman and Farnsworth, 2011). As a consequence of the potential influence of human activities, Syvitski and Milliman (2007) included an anthropogenic factor in their BQART model that predicts global sediment delivery to the oceans. Although intra-system storage might buffer some signals (i.e., low sediment delivery ratios; Phillips, 1991 and Walling and Collins, 2008), catchment changes can notably increase Qs. Damming and leveeing can significantly diminish sediment supply into sink areas (Syvitski et al., 2005 and Milliman and Farnsworth, 2011; and references therein), not only precluding new strata development but also yielding land loss in some areas (e.g., Smith and Abdel-Kader, 1988 and Day et al., 2007).

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