Terms of Hydrology (S)

safe yield Salinity salt content salt water saltation salt-water intrusion salt-water wedge sampling distribution sandbox model sanding-up saprobic saturated zone saturation vapour pressure; saturation vapor pressure (A) scanner scanning line scour S-curve sea-water intrusion secondary data processing secondary hydrometric station sediment sediment concentration sediment discharge sediment grading sediment sampler sediment yield Sedimentation sedimentation diameter sediment-carrying capacity sedimentology Seepage seepage face seepage spring seepage velocity seiche semi-arid zone semi-pervious boundary sensitivity serial correlation serial correlation coefficient settling settling velocity sewage shale ice sharp-crested weir sheet erosion sheet flow shifting bed shifting control shoal shore ice shore-line short-term hydrological forecast shower shuga sidelooking airborne radar (SLAR) significance sill Silt silt content silting-up Simulation sink sink hole siphon skewness Skimming sleet slope (of water surface) slope-area method Sludge slush slush ice snow snow board snow course snow cover snow coverage snow density snow depth snow ice snow melt snow pack snow patch snow pillow snow stake snow survey snow tube snowdrift snowfall snowflakes snow-gauge; snow gage (A) snow-line snow-melt flood snow-pack yield sodium absorption ratio (SAR) soft water soil drainage soil moisture soil moisture content soil moisture deficit soil moisture equivalent soil moisture probe soil moisture profile soil moisture retention soil moisture tension soil salinization soil water solitary wave solubility sounding (hydrometry) sounding pole sounding weight source specific absorption specific capacity specific discharge (from a basin) specific discharge (of groundwater) specific drawdown specific energy specific groundwater runoff specific humidity specific retention specific storage specific yield spectral band spill spillway spillway capacity spillway design flood splash spreading spring spring tapping spring tide sprinkling spur spurious error squall squall line stable (unstable) reach stable channel staff gauge; staff gage (A) stage stage-discharge relation stagnant water standard deviation standard error standard error of estimate (s.e.e.) standard project flood standardized variate standing water level standing wave stationary orbit stationary process station-year method steady water level stem flow step-drawdown test stilling well stochastic hydrology stochastic process storage storage coefficient storage curve storage equation storage ratio storage reservoir storm storm duration storm surge storm transposition Stratification stream stream centre line