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Annual Ave Flow, MGDBasin Yield Example:Index Gage Annual Streamflow(1960 to 2004)Example Annual Flow for Index Gage and 100 SqMi Area300Average Annual FlowAnd Median= 136 MGD1965 = 2 pct = 43 MGD1966 = 5 pct= 52 MGD1985 = 7 pct = 59 MGD1980 = 10 pct = 89 MGD250200150100Annual Flow , cfsm25th pctl10th pctlMedian25 th pct = 106 MGD500196019631966196919721975197819811984198719901993199619992002YearHydrologicFoundation(2 pct and 10 pct precip years correlate with2 pct and 10 pct streamflow years!)FOR DISCUSSION PURPOSES ONLY - NOT TO BE CITED10
Flow, cfsm1/1/19653/1/19655/1/19657/1/19659/1/196511/1/19651/1/19663/1/19665/1/19667/1/19669/1/196611/1/1966Flow, cfsm1/1/19803/1/19805/1/19807/1/19809/1/198011/1/19801/1/19813/1/19815/1/19817/1/19819/1/198111/1/1981Index Gage Daily 1960’s and 1980’s Flows(There was still a seasonal range and storms!)E Meadow River Haverhill Flow 1965 to 196610.001.000.101960’s Minimum Flow= 0.05 cfsm0.01DateE Meadow River Haverhill Flow 1980 to 198110.001980’s Minimum Flow= 0.10 cfsm1.000.100.01HydrologicFoundationFOR DISCUSSION PURPOSES ONLY - NOT TO BE CITEDDate11
Page 4: MA Water Resource Realities1. In a
Page 12 and 13: A Conceptual Safe Yield Approachwit
Page 14 and 15: Annual Ave Flow, MGDOne Example of
Page 16 and 17: Authorized Withdrawals by Basin(cfs
Page 18 and 19: Evaluate Biological Alteration• R
Page 20 and 21: Consider Stream Classification• W
Page 22 and 23: Protection• Identify Protection P
Page 24 and 25: Incorporate Streamflow Criteria int
Page 26: Determine Safe YieldMethodologyQUES

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