Related by context. Frequent words. (Click for all words.) 59 ponded 58 spalling 57 erosional 56 impermeable surfaces 56 embayment 55 subglacial 55 gulleys 55 frost heave 55 streambanks 54 thaw cycles 54 sulfide minerals 53 bioswale 53 ponding 53 basalt rock 53 groundwater depletion 53 seepage 53 freeze thaw cycles 53 sediment 53 hydrologic cycle 53 bridge abutments 53 drainage basins 53 ferric chloride 52 porous limestone 52 laminae 52 sedimentation 52 permeable paving 52 recontamination 52 landfill leachate 52 undersurface 52 dentine 52 drainage 52 hydrothermal activity 52 salt crystals 52 leachate collection 51 calcium oxide 51 oxidise 51 metastable 51 subgrade 51 clarifiers 51 silts 51 salinization 51 oxidization 51 roadbeds 51 andesitic 51 frost heaves 51 manganese oxide 51 erosive 51 atheroma 51 parapet walls 51 Seepage 51 clathrates 51 corrosives 51 porous pavement 51 hydrothermal fluids 51 phosphorus runoff 51 stormwater discharge 51 microstructural 51 Blowing dust 50 porous asphalt 50 Sedimentation 50 evaporation ponds 50 revetments 50 collisional 50 iron oxides 50 lateritic 50 recharge groundwater 50 ice damming 50 streambeds 50 hydrophobicity 50 pier pilings 50 temperature gradients 50 wastewater effluent 50 drainage culverts 50 temperature gradient 50 riparian buffer 50 sedimentary layers 50 drainfield 50 groundwater aquifers 50 Soil erosion 50 stormwater ponds 50 downpipes 50 cementation 50 encrustation 50 leaching 50 erosion 49 Calcium carbonate 49 shallow aquifer 49 marine sediments 49 nonstructural 49 discolouration 49 bioswales 49 riparian vegetation 49 retention basins 49 Sediments 49 drains 49 waterflow 49 permeable pavers 49 Rumble strips 49 Melting snow 49 flocculation 49 coarse sand