runoff

noun 0.819

surface water

noun 0.735

streamwater

noun 0.663

running water

noun 0.633

stormflow

noun 0.626

surface discharge

noun 0.618

rainwater

noun 0.606

storm sewer

noun 0.593

floodwater

noun 0.574

waterflow

noun 0.571

runout

noun 0.570

runnel

noun 0.565

throughflow

noun 0.563

drainage

noun 0.562

overrun

noun 0.560

flash flooding

noun 0.560

mudflow

noun 0.559

drainage basin

noun 0.556

wastewater

noun 0.552

downspout

noun 0.550

outwash

noun 0.546

sheet erosion

noun 0.545

sullage

noun 0.544

outflow

noun 0.544

rainfall

noun 0.541

run-on

noun 0.541

runway

noun 0.541

outrush

noun 0.541

overspill

noun 0.535

flooding

noun 0.534

the runs

noun 0.533

watercourse

noun 0.531

snowmelt

noun 0.531

flash flood

noun 0.530

runaway

noun 0.529

seepage

noun 0.529

water pollution

noun 0.526

overdrainage

noun 0.525

runny nose

noun 0.525

outfall

noun 0.521

rill erosion

noun 0.521

outrun

noun 0.520

overflowing

noun 0.519

free water

noun 0.518

rivulet

noun 0.516

flood

noun 0.515

rainout

noun 0.515

water cycle

noun 0.514

downpour

noun 0.513

catchment basin

noun 0.511

underrun

noun 0.510

rain

noun 0.509

erosion

noun 0.509

throughfall

noun 0.509

drain field

noun 0.507

drain

noun 0.506

effluent

noun 0.506

first rain

noun 0.504

meltwater

noun 0.504

spillway

noun 0.504

deluge

noun 0.504

streambed

noun 0.503

overflow

noun 0.502

inundation

noun 0.501

bank run

noun 0.501

run

noun 0.501