oasisobjective forecastoblique dunesoblique expansion waveoblique jumpobsequentobservationobstructionocclusionoceanocean currentoceanic climateoceanographyochric epipedonocluded frontoff site damage costsoffestoffsetoffshero terraceofftakeogee spillwayogee weirogee weirsoktaold riverold valleyombrometeron site damage costsone point methodone tailed testooliteoozeopaqueopen channelopen channel flowopen channel routingopen drainopen rangeopen structureoperatoroptical air massoptimal orderoptimization analysisoptimomizationoptimumoptimum aerator efficiencyoptimum aerator heihgtoptimum maximum angleorderorganic
