Modeling soil accretion and carbon accumulation in deltaic rice fields

•Delta rice paddies are threatened by subsidence and rising sea levels.•Past sediment input into the Ebro Delta rice fields facilitated vertical accretion of the soil.•Soil accretion and SOC profile of paddy soils in the Ebro Delta have been modelled.•Sediment and crop residue input promotes vertical accretion and SOC accumulation.•Scenarios of sediment input to rice fields are simulated.