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Scientific Investigations Report 2007–5205

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5205

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Table 3. Calibration statistics for PRMS watershed models of gaged watersheds of the Carson Range and Pine Nut Mountains, Carson Valley, Nevada and California.

[Bias = ∑(simulated–measured)/∑(measured)*100. Relative error = ∑((simulated–measured)/measured)*100/number of measurements. RMSE is root mean square error–SQRT(∑(simulated–measured)2/number of measurements. –, not calculated because of zero flow for many days]

Season Bias
(percent)		 Relative error
(percent)		 RMSE
(inches)		   Season Bias
(percent)		 Relative error
(percent)		 RMSE
(inches)
Daggett Creek
(water years 1990–2002)		   Fredericksburg Canyon
(water years 1990–2001)
October–December -5.4 -8.7 0.1 October–December 6.7 4.8 0.2
January–March 7.6 2.9 0.2 January–March 2.4 7.8 0.3
April–June -14.0 -7.8 0.2 April–June 18.6 27.0 0.4
July–September -1.5 1.4 0.1 July–September -2.3 13.1 0.3
Period of record mean monthly -3.7 -2.7 0.2 Period of record mean monthly 3.7 14.6 0.4
Period of record mean annual -3.7 5.6 1.1 Period of record mean annual 3.7 12.0 6.0
Pine Nut Creek
(water years 1981–97)1		   Buckeye Creek
(water years 1981–97)
October–December -72.0 -70.0 0.1 February–April -12.3 5.0 0.1
January–March 16.9 3.8 0.2 – – – –
April–June 6.0 21.8 0.1 – – – –
July–September 40.0 8.5 0.0 – – – –
Period of record mean monthly -5.4 -9.7 0.2 – – – –
Period of record mean annual -15.0 -11.0 1.0 Period of record mean annual2 7.7 -5.4 0.0

1 Calculated for months with non-zero simulation results.

2 Calculated with water year 1994 removed.

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