stage of riverstagnation presurestalactitestalagmitestandard atmospherestandard creststandard deviationstandard errorstandard fall velocitystandard isobaric surfacestandard panstandardized precipitation indexstanding cloudstanding wavestannerstarting conditionsstartup periodstatement orientedstatic headstatic pressurestatic stabilitystatical dynamical modelstaticsstation pressurestation rating curvestationarystationary frontstationary statestationary wavestatistical forecaststatistical modelsteady flowsteady statesteamsteam flushingsteam fogsteeningsteep slopesteepest descentstefan boltzmann constantsteiningstemstem bankstem flowstepstep response functionstepped fall spillwaysteps in conservation planningstevenson screenstill water