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### 17 Cards in this Set

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 regime =timing of that water yield over many years, a single year, or for events of shorter durations water quality =chemical or biological attributes of water in relation to a particular use or a regulatory standard diagram of water balance equation water yield =the total quantity of water produced over a given period (annual). The total runoff or streamflow from a watershed how do you manage yield in forests? -balance harvest against recovery of old disturbances hydrolic cycle -precipitation to evaporation -98% evaps from ocean -in a forest, no surface runoff, all goes into soil water balance equation (arithmetic expression of the hydrolic cycle) P= S + (T + I + E) + Q P= precipitation (input) S= change in storage Q= runoff or streamflow (loss) E= evaporation (loss) T= transpiration (loss) I= interception (loss) how to manage H2O a. water yield b. water regime c. water quality forest and water -water is the basis for life, has no substitutes, and is finite but recyclable transpiration =water lost through leaf stomata during photosynthesis what does transpiration depend on? -how much leaf area in forest -what tree species are present b/c some use more H2O what does interception of precipitation depend on -how much leaf area in forest -what tree species present -type and amount of precipitation interception of precipitation =capture of precipitation on foliage and subsequent re-evaporation back to the atmosphere how does one store water use of dams water regime =the distribution of yield over time. The pattern of annual flow or flow resulting from an individual stormq where does water flow 88% north 12% east how long do increases in yield last? -a function of how fast vegetation grows back. recovery is fast/slow when tree growth is fast/slow