## 5 Discussion
### Difference Analysis of Grain Size Probability Curves of Different Microfacies
& (1) Subaqueous & (1) non-segments & 76 & - & 22 & 58 & - & 24 & 1.4–1.8 \(\upmu\) \\  & & distributancy & (2) one booncing & \multirow{3}{*}{51–57} & \multirow{3}{*}{34–40} & \multirow{3}{*}{6–12} & \multirow{3}{*}{58–63} & \multirow{3}{*}{-} & \multirow{3}{*}{14–19} & \multirow{3}{*}{0.8–14} \(\upmu\) \\  & channel & characteristics & segment-one complex & & & & & & \\  & & transitional zone & & & & & & & \\  & & transitional zone & & & & & & & \\  & & & (1) Subaqueous & (1) b-segments & \multirow{3}{*}{72–79} & \multirow{3}{*}{17–20} & \multirow{3}{*}{4–11} & \multirow{3}{*}{58–64} & \multirow{3}{*}{30–35} & \multirow{3}{*}{10–14} & \multirow{3}{*}{1.6–24} \(\upmu\) \\  & & distributancy & (2) one booncing & \multirow{3}{*}{76–12} & \multirow{3}{*}{19} & \multirow{3}{*}{9} & \multirow{3}{*}{6–90} & \multirow{3}{*}{37} & \multirow{3}{*}{13} & \multirow{3}{*}{13} \\  & channel & characteristics & segment-one suspension & & & & & & \\  & & & segment-one suspension & & & & & & \\  & & & segment-one suspension & & & & & & \\  & & & segment-one transitional & & & & & & \\  & & & (2) one booncing & \multirow{3}{*}{72–74} & \multirow{3}{*}{18–19} & \multirow{3}{*}{6–8} & \multirow{3}{*}{6–67} & \multirow{3}{*}{35–37} & \multirow{3}{*}{12–13} & \multirow{3}{*}{0.8–14} \(\upmu\) \\  & & segment-one suspension & & & & & & & \\  & & segment-one transitional & & & & & & \\  & & & (1) one booncing & \multirow{3}{*}{56–64} & \multirow{3}{*}{16–22} & \multirow{3}{*}{16–22} & \multirow{3}{*}{55–60} & \multirow{3}{*}{-} & \multirow{3}{*}{15–18} & \multirow{3}{*}{1.4–28} \(\upmu\) \\  & & segment-one suspension & & & & & & & \\  & & segment-one transitional & & & & & & \\  & & & & & & & & & \\ \hline \multirow{6}{*}{**Sandy debris**} & \multirow{3}{*}{3.} & (1) Lower & \multirow{3}{*}{3.} & (1) Lower & \multirow{3}{*}{56–64} & \multirow{3}{*}{16–22} & \multirow{3}{*}{16–22} & \multirow{3}{*}{55–60} & \multirow{3}{*}{-} & \multirow{3}{*}{15–18} & \multirow{3}{*}{1.4–28} \(\upmu\) \\  & & microclides & & & & & & &  
The shallow-water delta deposits are generally characterized by traction current, but there are some differences between inner front subfacies and outer front subfacies. The subaqueous distributary channel microfacies are dominant in the inner front subfacies of the shallow-water delta, and the sediment of this microfacies shows the characteristics of frequent river diversion and erosion damage to the early river channel under the background of the lake level changes during flood and dry seasons. The grain size probability curves of the inner front subfacies show a tri-segments pattern and \"one bouncing segment-one suspension segment-one complex transitional zone\" pattern with higher content of transitional components (34-40%) (Figure 8b). The shallow-water delta outer front subfacies mainly include subaqueous distributary channel microfacies and estuarine bar microfacies, which show the characteristics of a delta dominated by fluvial sedimentation with weak lake hydrodynamic action. The grain size probability curves of the subaqueous distributary channel microfacies in the outer front show \"one bouncing segment-one suspension segment-one transitional zone pattern\" and bi-segments pattern, which is characterized by higher bouncing component content (51-96%) and bouncing segment gradients (58-64\({}^{\circ}\)) (Table 1, Figure 8a,d). The grain size probability curves of the estuarine bar microfacies in the outer front area are shown as \"bi-bouncing segment-one suspension segment-one transitional zone\" pattern and \"one bouncing segment-one suspension segment-one transitional zone\" pattern with higher gradients of transitional segment (Table 1, Figure 8e). In shallow-water deltas, transitional components are generally developed, which also indicates that the shallow-water deltas are characterized by fast river velocity and rapid deposition of sediments under the action of the lake hydrodynamics. Figure 8: Comparison diagram of grain size content and slope in different sedimentary microfacies.