Tolva At Istok

Tolva At Istok
North European Russia

Point ID: 9031

Code: 71239

Latitude: 67.50°	Distance to Outlet: 2.80
Longitude: 31.50°	Yearly Min: 1934
X EASE-Grid: 1298875.00	Yearly Max: 1985
Y EASE-Grid: -2119488.00	Number of Years: 30
Drainage Area: 3080.00 km²	Percentage of Coverage: 58%
Drainage Area Effective: 3080.00 km²	Percentage of Coverage by Month: 54%
Source: SHI	Notes:
Gauge Altitude: 134.79

Field Definitions

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Site Descriptor Information	Site Time Series Data
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Statistics

Time Series

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Units:

m³/s

Summary Statistics

Statistic	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Mean	22.19	19.00	17.50	16.54	57.98	89.13	52.43	41.45	39.06	41.07	34.12	26.97	38.33
Standard Deviation	4.65	4.16	2.74	2.78	25.34	25.23	16.14	14.20	9.01	10.43	7.35	4.17	5.94
Min	12.90	12.00	12.40	11.00	24.90	37.80	27.00	22.80	21.10	22.90	22.10	19.90	24.42
Max	31.80	29.50	24.70	23.70	101.00	141.00	108.00	75.80	60.30	60.90	55.90	35.90	49.82
Coefficient of Variation	0.21	0.22	0.16	0.17	0.44	0.28	0.31	0.34	0.23	0.25	0.21	0.15	0.15

Time Series Data

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
1934	12.90	12.00	14.00	11.00	92.80	62.40	39.90	27.20	40.20	40.40	31.90	22.30	33.92
1935	17.70	17.60	17.20	16.20	28.10	111.00	58.70	38.10	28.80	34.60	39.60	30.10	36.48
1936	20.20	18.40	15.30	16.20	70.00	46.40	46.20	43.90	38.30	28.90	33.00	22.50	33.27
1937	18.80	16.50	15.80	16.40	43.40	37.80	27.00	22.80	21.10	27.10	25.70	20.60	24.42
1938	17.50	16.90	15.00	14.60	39.40	95.20	60.70	37.10	35.90	35.10	31.40	28.40	35.60
1939	21.70	20.40	17.40	15.70	25.40	105.00				25.10	23.60	22.30
1940	17.20	15.20	14.00	12.70	66.00	50.30	36.00
1963								43.00	49.90	54.50
1964					75.10	98.00	42.70	30.70	45.10	47.40	34.70	28.10
1965	26.20	23.20	18.70	17.40	54.00	90.90	69.80	70.10	60.30	45.60	46.20	33.40	46.32
1966	25.90	16.60	17.10	18.20	80.90	83.70	67.90	50.40	46.00	49.40	45.50	35.90	44.79
1967	29.50	25.70	22.60	23.70	74.20	113.00	47.70	39.40	38.20	35.90	55.90	29.20	44.58
1968	31.80	29.50	20.80	21.00	24.90	112.00	48.30	33.50	34.80	39.90	32.10	28.50	38.09
1969	22.20	15.60	17.50	14.90	26.80	134.00	59.30	35.90	36.80	47.20	37.20	26.50	39.49
1970	22.10	17.90	19.40	16.20	48.40	81.80	45.60	33.10	42.80	51.40	28.30	29.90	36.41
1971	21.40	18.20	18.20	17.80	26.60	81.60	39.40	38.90	37.80	40.40	34.10	24.00	33.20
1972	20.00	13.00	13.40	14.40	28.00	98.50	46.00	34.80	36.90	48.80	36.40	28.40	34.88
1973	26.80	23.90	19.30	18.90	67.40	120.00	46.90	25.20	23.40	24.90	22.41	19.90	36.58
1974	17.80	20.20	17.50	14.20	32.10	93.70	68.90	75.80	57.00	60.90	34.50	32.60	43.77
1975	29.60	22.90	24.70	20.10	100.00	84.00	50.00	35.00	35.60	60.10	36.90	27.60	43.88
1976	25.40	24.40	20.10	18.60	72.90	67.00	36.80	28.40	25.50	22.90	22.10	20.60	32.06
1977	16.90	15.20	14.40	12.70	79.50	77.60	57.90	53.10	36.10	29.10	34.60	29.80	38.08
1978	23.80	19.80	17.40	16.50	36.10	75.50	43.40	41.90	38.90	41.20	38.80	26.30	34.97
1979	21.60	16.80	19.90	15.50	68.00	87.30	48.90	39.60	43.30	43.60	33.10	28.30	38.83
1980	21.60	16.70	18.00	18.00	43.40	93.70	38.60	30.90	32.60	36.50	31.00	25.10	33.84
1981	21.60	18.80	16.80	16.40	61.80	141.00	108.00	61.80	45.70	46.80	28.90	30.20	49.82
1982	27.30	21.90	17.80	17.40	84.10	119.00	70.10	47.70	49.40	38.90	34.90	25.30	46.15
1983	21.60	19.10	17.50	18.60	101.00	95.90	52.60	46.20	41.60	54.60	37.80	31.10	44.80
1984	26.90	23.10	17.90	18.00	99.10	52.80	71.90	72.00	40.70	33.30	26.90	20.90	41.96
1985	15.30	12.60	12.40	11.80	32.10	75.80	38.80	24.00	31.00	46.60	38.00	27.40	30.48

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