Mathematical Problems in Engineering / 2020 / Article / Tab 5

Research Article

Study on the Evaluation Method of Subgrade Slope Green Protection Effect in Dry-Hot Valley of Sichuan-Tibet Railway

Table 5

Index data.


Volumetric weight of soil (g·cm−3)
Total soil porosity (%)57.459.861.358.256.762.5
Organic matter content (g·kg−1)18.217.617.319.418.517.9
Duration of soil PWP (month)443346
Soil infiltration rate (mm·h−1)27.326.529.731.228.432.2
Total N (g·kg−1)1.491.
Available P (P2Q5) (g·kg−1)0.0130.0140.0160.0180.0190.013
Available K (K2O) (g·kg−1)0.090.0950.0930.0880.110.07
Ability of soil to preserve moisture and fertilityStrongStrongMediumStrongMediumStrong
Soil expansion and contractionWeakWeakWeakMediumWeakWeak
Coverage of vegetation (%)91.388.489.787.988.290.8
Vegetation survival rate (%)81.789.284.591.579.686.1
Incidence of pests and diseases in vegetation (%)34.541.740.935.340.137.5
Vegetation species richness index0.971.030.950.991.060.92
Rationality of vegetation spatial collocationReasonableReasonableReasonableReasonableReasonableReasonable
Ability of vegetation to resist drought and heatVery strongStrongStrongStrongStrongStrong
Vegetation tolerance to barrennessStrongStrongVery strongStrongStrongStrong
Slope resistance to leaching erosionStrongStrongStrongStrongVery strongStrong
Antiscouring abilityStrongStrongMediumStrongMediumStrong
Ability of slope to protect against wind and sandStrongMediumStrongStrongStrongStrong
Slope resistance to natural disastersMediumStrongStrongMediumStrongStrong
Ability of slope to prevent water and soil lossStrongVery strongStrongStrongStrongMedium

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