Terms of Hydrology (A)

abiotic ablation abrasion abrupt wave absolute humidity absorption band absorption loss abstraction accelerated flow acceptance capacity Accretion accumulation accumulative precipitation gauge; cumulative precipitation gage (A) accuracy acid rain acidity of water acidizing active basin area active sensing system actual density of soil actual evaporation actual evapotranspiration adhesive water admissible concentration limit advection Aeration aerobic condition afflux aggradation aggressive water air humidity air moisture air-line correction alarm level Albedo Algal bloom alkaline water alkalinity of water alluvial alluvial channel alluvial fan alluvial plain alluvium altitude anaerobic condition analogue model; analog model (A) anchor ice anemometer angularity correction annual exceedence series Annual flood annual maximum series annual minimum series annual runoff annual series annual storage anoxic antecedent precipitation index antecedent soil moisture antidunes applied hydrology approach channel aquiclude Aquifer aquifer test aquifuge aquitard area of influence area-elevation curve areal precipitation areal reduction factor (of rainfall) arheic arid zone aridity arid-zone hydrology arithmetic mean armouring; armoring (A) artesian aquifer artesian basin artesian head artesian spring artesian well artificial precipitation artificial recharge aspect attached groundwater aufeis auger sampler autocorrelation autocorrelation coefficient automatic station autoregressive process autoregressive series available head available soil moisture available storage capacity avalanche average average velocity average year avulsion axisymmetric flow