In order to investigate the function of water conservation in lands of different using types in the dump reclamation area

using field double-ring infiltration method and indoor soil physical and chemical analysis

this paper systematically investigated soil infiltration characteristics and their influencing factors under different utilization types (arbor

shrub

farmland

and grassland) in the dump reclamation area. The results indicated that infiltration rates

stable infiltration rate

and cumulative infiltration under different utilization types in the dump reclamation area showed the following order of arbor > shrub > farmland > grassland; The goodness of fit of the infiltrating processes were different under different utilization types in the dump reclamation area

with the average value being 0.926

0.908

and 0.905 for the G-P model

the Kastiakov model

and the Horton model

respectively. The relative error of the G-P model was 79.2%-123.69%

it was closed to the actual process of soil infiltration in the reclaimed area

and could be used as the prediction model of soil infiltration process in the reclaimed area. The initial infiltration rate under different utilization types in the dump reclamation area had significantly positive correlations with non-capillary porosity

and stable infiltration rate

while cumulative infiltration had significantly positive correlations with non-capillary porosity

gravel content

root length density

and root surface area density. Principal component analysis showed that soil infiltration capacity followed the order of arbor > shrub > farmland > grassland. The initial infiltration rate

stable infiltration rate

14-min infiltration rate

and cumulative infiltration together accounted for 99.047% of the principal component variance

and described the soil infiltration capacity well.