Continent: |
Europe | Latitude: |
56.93 | deg. |
Country: |
Russia | Longitude: |
35.47 |
deg. |
River: |
Tvertca | Elevation: |
129.0 |
m |
Station: |
Mednoe | Area: |
5400.0 |
km2 |
| Mean for Observation Period: | 1938 | - | 1985 | Total months: | 564 |
| - | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| m3/c | 34.9 | 32.5 | 40.2 | 196. | 98.4 | 54.7 | 44.8 | 43.8 | 38.4 | 48.5 | 49.6 | 42.3 | 60.3 |
| mm | 17.3 | 14.7 | 19.9 | 94.0 | 48.8 | 26.3 | 22.2 | 21.7 | 18.4 | 24.0 | 23.8 | 21.0 | 353. |
| km3 | 0.094 | 0.079 | 0.11 | 0.51 | 0.26 | 0.14 | 0.12 | 0.12 | 0.099 | 0.13 | 0.13 | 0.11 | 1.90 |
| l/s/km2 | 6.47 | 6.02 | 7.45 | 36.3 | 18.2 | 10.1 | 8.30 | 8.12 | 7.10 | 8.98 | 9.18 | 7.83 | 11.2 |
| %% | 4.83 | 4.49 | 5.55 | 27.0 | 13.6 | 7.56 | 6.19 | 6.05 | 5.30 | 6.70 | 6.85 | 5.84 | 100. |
Tvertca at Mednoe
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| 1938 | 11.4 | 12.9 | 96.0 | 98.4 | 57.3 | 27.4 | 21.0 | 18.4 | 19.5 | 21.3 | 13.6 | 8.69 | 33.8 |
| 1939 | 7.08 | 9.78 | 12.2 | 131. | 38.8 | 31.6 | 21.4 | 14.6 | 15.0 | 20.0 | 23.7 | 13.5 | 28.2 |
| 1940 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1941 | 9.94 | 8.74 | 10.8 | 117. | 152. | 36.7 | 22.6 | 12.1 | 15.5 | 21.5 | 10.2 | 8.50 | 35.5 |
| 1942 | 10.5 | 11.5 | 22.8 | 190. | 51.5 | 79.0 | 55.6 | 71.2 | 38.2 | 41.7 | 28.1 | 17.9 | 51.5 |
| 1943 | 17.5 | 17.5 | 27.2 | 188. | 53.5 | 42.0 | 82.7 | 36.4 | 34.0 | 39.4 | 35.9 | 33.3 | 50.6 |
| 1944 | 23.8 | 22.5 | 22.3 | 136. | 68.2 | 30.6 | 27.9 | 28.2 | 21.8 | 19.1 | 26.0 | 18.4 | 37.1 |
| 1945 | 9.19 | 9.98 | 12.7 | 174. | 90.9 | 36.2 | 30.2 | 46.8 | 66.0 | 49.7 | 40.5 | 24.5 | 49.2 |
| 1946 | 28.3 | 25.2 | 25.2 | 239. | 98.7 | 29.7 | 26.1 | 27.8 | 40.0 | 42.1 | 39.9 | 28.2 | 54.2 |
| 1947 | 25.1 | 18.1 | 16.6 | 354. | 82.6 | 47.3 | 25.7 | 12.7 | 16.8 | 20.4 | 30.0 | 28.4 | 56.5 |
| 1948 | 29.0 | 27.4 | 22.7 | 203. | 32.3 | 22.9 | 15.6 | 23.6 | 26.6 | 19.8 | 30.9 | 41.7 | 41.3 |
| 1949 | 23.1 | 21.4 | 23.1 | 127. | 51.5 | 70.1 | 60.4 | 68.9 | 34.3 | 32.9 | 33.6 | 28.3 | 47.9 |
| 1950 | 23.4 | 24.0 | 29.7 | 287. | 63.1 | 70.9 | 64.8 | 54.4 | 44.6 | 55.7 | 70.4 | 58.7 | 70.6 |
| 1951 | 35.4 | 30.9 | 56.1 | 238. | 46.6 | 47.3 | 24.4 | 28.3 | 17.0 | 23.5 | 24.8 | 23.0 | 49.6 |
| 1952 | 22.5 | 23.4 | 26.8 | 157. | 52.6 | 36.5 | 48.8 | 35.6 | 44.0 | 170. | 164. | 51.2 | 69.4 |
| 1953 | 45.9 | 45.0 | 53.3 | 266. | 73.4 | 35.7 | 106. | 173. | 155. | 182. | 68.1 | 99.7 | 109. |
| 1954 | 47.0 | 44.1 | 60.5 | 113. | 95.8 | 40.9 | 31.4 | 34.8 | 36.6 | 85.6 | 56.8 | 47.9 | 57.9 |
| 1955 | 48.8 | 43.8 | 48.2 | 152. | 401. | 138. | 49.2 | 326. | 35.0 | 36.5 | 34.8 | 34.4 | 112. |
| 1956 | 32.0 | 29.7 | 21.1 | 179. | 183. | 41.6 | 42.5 | 42.3 | 42.4 | 59.5 | 40.8 | 57.6 | 64.3 |
| 1957 | 22.9 | 24.9 | 20.1 | 229. | 45.5 | 32.5 | 23.8 | 21.9 | 31.5 | 49.6 | 34.9 | 18.8 | 46.3 |
| 1958 | 42.3 | 48.1 | 69.0 | 305. | 215. | 58.2 | 37.3 | 35.6 | 39.2 | 77.8 | 74.5 | 59.9 | 88.5 |
| 1959 | 55.0 | 57.8 | 68.9 | 344. | 89.0 | 54.1 | 34.2 | 38.5 | 19.4 | 32.7 | 31.1 | 20.1 | 70.4 |
| 1960 | 20.2 | 19.4 | 25.0 | 178. | 79.5 | 49.2 | 19.9 | 23.4 | 51.2 | 39.1 | 43.8 | 108. | 54.7 |
| 1961 | 65.6 | 55.4 | 99.8 | 181. | 132. | 48.9 | 35.1 | 35.4 | 36.1 | 33.4 | 34.6 | 35.2 | 66.0 |
| 1962 | 39.4 | 43.2 | 37.7 | 248. | 119. | 73.3 | 152. | 77.4 | 75.8 | 71.9 | 68.8 | 53.7 | 88.3 |
| 1963 | 46.0 | 43.5 | 32.6 | 143. | 55.9 | 43.5 | 33.4 | 29.8 | 28.4 | 19.5 | 18.4 | 17.0 | 42.6 |
| 1964 | 19.2 | 18.0 | 15.7 | 104. | 94.3 | 27.8 | 23.4 | 10.6 | 23.6 | 11.2 | 15.8 | 20.8 | 32.0 |
| 1965 | 25.7 | 28.1 | 27.5 | 127. | 100. | 74.5 | 39.9 | 68.8 | 25.7 | 24.5 | 27.5 | 37.0 | 50.5 |
| 1966 | 42.6 | 32.1 | 45.7 | 446. | 117. | 65.4 | 21.6 | 22.5 | 46.7 | 26.7 | 28.0 | 28.7 | 76.9 |
| 1967 | 46.8 | 50.2 | 48.2 | 275. | 111. | 64.7 | 50.8 | 44.4 | 55.4 | 89.5 | 75.5 | 38.3 | 79.2 |
| 1968 | 31.9 | 32.5 | 60.2 | 227. | 103. | 37.2 | 33.8 | 27.4 | 26.4 | 20.1 | 28.7 | 27.2 | 54.6 |
| 1969 | 25.2 | 26.0 | 24.5 | 84.7 | 38.0 | 85.1 | 22.6 | 20.5 | 23.2 | 35.8 | 82.9 | 77.1 | 45.5 |
| 1970 | 47.7 | 34.3 | 36.9 | 289. | 80.3 | 39.5 | 17.2 | 15.6 | 23.2 | 33.7 | 38.9 | 36.2 | 57.7 |
| 1971 | 28.7 | 29.3 | 32.2 | 119. | 55.1 | 16.2 | 31.0 | 26.5 | 27.4 | 57.4 | 48.7 | 41.2 | 42.7 |
| 1972 | 45.1 | 34.7 | 36.2 | 124. | 40.7 | 30.5 | 23.0 | 11.5 | 14.2 | 28.5 | 23.7 | 43.1 | 37.9 |
| 1973 | 23.6 | 26.0 | 35.6 | 146. | 74.3 | 44.6 | 19.2 | 16.4 | 25.9 | 32.5 | 36.3 | 33.9 | 42.9 |
| 1974 | 28.2 | 30.7 | 37.2 | 122. | 116. | 49.1 | 87.7 | 30.8 | 23.6 | 30.9 | 39.8 | 45.2 | 53.4 |
| 1975 | 61.0 | 53.0 | 87.7 | 189. | 48.4 | 28.6 | 24.8 | 16.2 | 22.2 | 29.3 | 27.7 | 25.5 | 51.1 |
| 1976 | 28.2 | 23.4 | 16.1 | 153. | 125. | 157. | 67.3 | 62.4 | 36.2 | 33.3 | 38.1 | 49.5 | 65.8 |
| 1977 | 40.5 | 36.0 | 44.5 | 307. | 107. | 100. | 62.6 | 90.8 | 40.6 | 45.8 | 89.7 | 61.2 | 85.5 |
| 1978 | 54.9 | 37.7 | 60.2 | 207. | 175. | 54.7 | 33.7 | 30.5 | 32.7 | 66.0 | 98.5 | 70.4 | 76.8 |
| 1979 | 45.3 | 44.7 | 41.5 | 220. | 162. | 38.1 | 34.2 | 39.6 | 29.3 | 34.6 | 49.4 | 47.5 | 65.5 |
| 1980 | 30.6 | 37.0 | 29.4 | 94.2 | 83.9 | 42.4 | 94.3 | 11.9 | 107. | 67.5 | 79.7 | 60.8 | 61.6 |
| 1981 | 56.1 | 55.6 | 68.1 | 200. | 129. | 40.9 | 41.6 | 23.5 | 57.6 | 138. | 134. | 72.2 | 84.7 |
| 1982 | 59.1 | 49.7 | 42.6 | 206. | 109. | 54.6 | 33.5 | 28.8 | 36.1 | 37.7 | 43.4 | 69.9 | 64.2 |
| 1983 | 65.5 | 50.5 | 84.0 | 182. | 64.9 | 43.5 | 83.5 | 42.5 | 35.2 | 26.7 | 42.1 | 59.2 | 65.0 |
| 1984 | 61.6 | 48.3 | 43.8 | 172. | 116. | 119. | 55.1 | 39.2 | 57.6 | 88.0 | 80.8 | 53.0 | 77.9 |
| 1985 | 33.1 | 31.6 | 31.7 | 229. | 147. | 134. | 113. | 62.2 | 49.3 | 56.4 | 122. | 53.7 | 88.6 |