Relationships of flow velocities and effective/dispersed (<i>E/D</i>) particle size distribution.

Relationships of flow velocities and effective/dispersed (E/D) particle size distribution.</p

<i>a</i>, <i>b</i>, <i>c</i>, and <i>d</i> values for the OC uneven enrichment in different size class sediments prediction function.

a, b, c, and d values for the OC uneven enrichment in different size class sediments prediction function.</p

Relationships of shear stress, stream power and the contributions of unevenly enriched OC in sediments to the SOC enrichment ratios in sediments (<i>Ca</i>).

Relationships of shear stress, stream power and the contributions of unevenly enriched OC in sediments to the SOC enrichment ratios in sediments (Ca).</p

Measured and calculated <i>ERocs</i> under different rainfall intensities and slopes.

Measured and calculated ERocs under different rainfall intensities and slopes.</p

Effects of runoff depth–flow velocity interaction on the differences in the percentages of effective to dispersed (<i>Der</i>; %) fine sand (0.05–0.25 mm) or coarse sand (>0.25 mm).

Der (0.05–0.25 mm) is the difference in the percentages of effective to dispersed 0.05–0.25 mm sediment particles; Der (> 0.25 mm) is the difference in the percentages of effective to dispersed > 0.25 mm sediment particles.</p

Effects of runoff depth–flow velocity interaction on <i>ER</i>_<i>OC</i> (OC enrichment ratios) of silt with clay-sized particles (<i>ER</i>_<i>oc</i> (<0.05 mm)), coarse silt (<i>ER</i>_<i>oc</i> (0.25–0.05 mm)), fine sand (<i>ER</i>_<i>oc</i> (2–0.25 mm)), coarse sand (<i>ER</i>_<i>oc</i> (>2 mm)), and total <i>ERocs</i> in sediment particles.

Effects of runoff depth–flow velocity interaction on EROC (OC enrichment ratios) of silt with clay-sized particles (ERoc (ERoc (0.25–0.05 mm)), fine sand (ERoc (2–0.25 mm)), coarse sand (ERoc (>2 mm)), and total ERocs in sediment particles.</p

The sampling site ((a) and (b)) and experimental plot ((c); a, outlet for collecting runoff; b, sample bucket to collect samples and c, slope) and soil surface suffering rain-induced soil erosion (d).

The sampling site ((a) and (b)) and experimental plot ((c); a, outlet for collecting runoff; b, sample bucket to collect samples and c, slope) and soil surface suffering rain-induced soil erosion (d).</p

Changing trend of flow velocity, runoff depth, shear stress, and stream power during the erosion process.

Changing trend of flow velocity, runoff depth, shear stress, and stream power during the erosion process.</p

Pearson correlation analysis results of flow hydraulic characteristics, contribution of unevenly enriched orgainc carbon in sediments to <i>ERoc</i> (<i>Ca</i>) and <i>ERocs</i>.

Pearson correlation analysis results of flow hydraulic characteristics, contribution of unevenly enriched orgainc carbon in sediments to ERoc (Ca) and ERocs.</p

Effect of hydraulic characteristics (e.g., flow velocity, runoff depth, shear stress, and stream power) on OC distribution in sediments (<i>C</i>_<i>soc1</i>: The SOC concentration in < 0.05 mm sediment particles; <i>C</i>_<i>soc2</i>: The SOC concentration in 0.05–0.25 mm sediment particles; <i>C</i>_<i>soc3</i>: The SOC concentration in 0.25–2 mm sediment particles; <i>C</i>_<i>soc4</i>: The SOC concentration in > 2 mm sediment particles).

Effect of hydraulic characteristics (e.g., flow velocity, runoff depth, shear stress, and stream power) on OC distribution in sediments (Csoc1: The SOC concentration in Csoc2: The SOC concentration in 0.05–0.25 mm sediment particles; Csoc3: The SOC concentration in 0.25–2 mm sediment particles; Csoc4: The SOC concentration in > 2 mm sediment particles).</p