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Table 6

Changes in mean annual suspended sediment discharge to river deltas. DOI: https://doi.org/10.1525/elementa.269.t6

RiverMean Qs
(Mt y–1)
NRLP Mean Qs
(Mt y–1)
Change in Mean QsDelta area
(km2)
Aggradation rate by suspended load
(mm y–1)

HistoricalaCurrentNRLP

 
Ganga and Brahmaputra 420 1000 160 830 –39% to –75% –9% to –25% 88100 5.4 3.6 2.5 
Mahanadi 9.5 3.0 –40% to –85% 5000 1.6 0.2 0.1 
Godavari 38 4.9 –71% to –99% 5200 7.3 1.6 0.2 
Krishna 0.35 0.06 –60% to –97% 4800 3.0 0.0 0.0 
Kaveri 0.18 0.23 +7% to +43% 8000 0.9 0.0 0.0 
RiverMean Qs
(Mt y–1)
NRLP Mean Qs
(Mt y–1)
Change in Mean QsDelta area
(km2)
Aggradation rate by suspended load
(mm y–1)

HistoricalaCurrentNRLP

 
Ganga and Brahmaputra 420 1000 160 830 –39% to –75% –9% to –25% 88100 5.4 3.6 2.5 
Mahanadi 9.5 3.0 –40% to –85% 5000 1.6 0.2 0.1 
Godavari 38 4.9 –71% to –99% 5200 7.3 1.6 0.2 
Krishna 0.35 0.06 –60% to –97% 4800 3.0 0.0 0.0 
Kaveri 0.18 0.23 +7% to +43% 8000 0.9 0.0 0.0 

a Historical data sources are Sarker (2004) for the Ganga, and Gupta et al. (2012) for the Mahanadi, Kaveri, Godavari and Krishna. The Brahmaputra is a relatively unregulated basin and was assumed to have a historical sediment load comparable to modern values.

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