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	19.29	15.05	15.22	13.92	50.41	75.01	45.59	36.04	32.87	35.71	28.72	23.45	392.79
Standard Deviation	4.04	3.30	2.38	2.34	22.03	21.23	14.03	12.35	7.59	9.07	6.19	3.62	60.85
Min	11.22	9.51	10.78	9.26	21.65	31.81	23.48	19.82	17.76	19.91	18.60	17.30	250.19
Max	27.65	23.37	21.48	19.95	87.82	118.66	93.90	65.91	50.75	52.95	47.04	31.21	510.46
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	11.22	9.51	12.17	9.26	80.69	52.51	34.69	23.65	33.83	35.13	26.85	19.39	347.54
1935	15.39	13.94	14.96	13.63	24.43	93.41	51.04	33.13	24.24	30.08	33.33	26.17	373.75
1936	17.56	14.58	13.30	13.63	60.86	39.05	40.17	38.17	32.23	25.13	27.77	19.56	340.96
1937	16.35	13.07	13.74	13.80	37.73	31.81	23.48	19.82	17.76	23.56	21.63	17.91	250.19
1938	15.22	13.39	13.04	12.29	34.26	80.12	52.78	32.26	30.21	30.52	26.43	24.69	364.78
1939	18.87	16.16	15.13	13.21	22.09	88.36				21.82	19.86	19.39
1940	14.96	12.04	12.17	10.69	57.39	42.33	31.30
1963								37.39	41.99	47.39
1964					65.30	82.47	37.13	26.69	37.95	41.21	29.20	24.43
1965	22.78	18.38	16.26	14.64	46.95	76.50	60.69	60.95	50.75	39.65	38.88	29.04	474.60
1966	22.52	13.15	14.87	15.32	70.34	70.44	59.04	43.82	38.71	42.95	38.29	31.21	458.97
1967	25.65	20.36	19.65	19.95	64.52	95.10	41.47	34.26	32.15	31.21	47.04	25.39	456.83
1968	27.65	23.37	18.09	17.67	21.65	94.25	42.00	29.13	29.29	34.69	27.01	24.78	390.32
1969	19.30	12.36	15.22	12.54	23.30	112.77	51.56	31.21	30.97	41.04	31.31	23.04	404.66
1970	19.22	14.18	16.87	13.63	42.08	68.84	39.65	28.78	36.02	44.69	23.82	26.00	373.07
1971	18.61	14.42	15.82	14.98	23.13	68.67	34.26	33.82	31.81	35.13	28.70	20.87	340.19
1972	17.39	10.30	11.65	12.12	24.34	82.89	40.00	30.26	31.05	42.43	30.63	24.69	357.44
1973	23.30	18.93	16.78	15.90	58.60	100.99	40.78	21.91	19.69	21.65	18.86	17.30	374.87
1974	15.48	16.00	15.22	11.95	27.91	78.85	59.91	65.91	47.97	52.95	29.03	28.34	448.47
1975	25.74	18.14	21.48	16.91	86.95	70.69	43.47	30.43	29.96	52.26	31.05	24.00	449.58
1976	22.09	19.33	17.48	15.65	63.38	56.38	32.00	24.69	21.46	19.91	18.60	17.91	328.49
1977	14.69	12.04	12.52	10.69	69.12	65.31	50.34	46.17	30.38	25.30	29.12	25.91	390.14
1978	20.69	15.69	15.13	13.89	31.39	63.54	37.73	36.43	32.74	35.82	32.65	22.87	358.30
1979	18.78	13.31	17.30	13.04	59.12	73.47	42.52	34.43	36.44	37.91	27.86	24.61	397.83
1980	18.78	13.23	15.65	15.15	37.73	78.85	33.56	26.87	27.43	31.74	26.09	21.82	346.77
1981	18.78	14.89	14.61	13.80	53.73	118.66	93.90	53.73	38.46	40.69	24.32	26.26	510.46
1982	23.74	17.35	15.48	14.64	73.12	100.14	60.95	41.47	41.57	33.82	29.37	22.00	472.89
1983	18.78	15.13	15.22	15.65	87.82	80.70	45.73	40.17	35.01	47.47	31.81	27.04	459.06
1984	23.39	18.30	15.56	15.15	86.17	44.43	62.52	62.60	34.25	28.95	22.64	18.17	429.94
1985	13.30	9.98	10.78	9.93	27.91	63.79	33.74	20.87	26.09	40.52	31.98	23.82	312.36

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