Continent: |
Europe | Latitude: |
55.48 | deg. |
Country: |
Russia | Longitude: |
28.77 |
deg. |
River: |
Zapadnaya Dvina | Elevation: |
106.2 |
m |
Station: |
Polotck | Area: |
41700.0 |
km2 |
| Mean for Observation Period: | 1936 | - | 1985 | Total months: | 551 |
| - | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| m3/c | 143. | 120. | 212. | 1173. | 557. | 189. | 148. | 130. | 143. | 192. | 214. | 187. | 284. |
| mm | 9.22 | 7.02 | 13.6 | 72.9 | 35.8 | 11.7 | 9.49 | 8.33 | 8.91 | 12.3 | 13.3 | 12.0 | 215. |
| km3 | 0.38 | 0.29 | 0.57 | 3.04 | 1.49 | 0.49 | 0.40 | 0.35 | 0.37 | 0.51 | 0.55 | 0.50 | 8.96 |
| l/s/km2 | 3.44 | 2.87 | 5.08 | 28.1 | 13.4 | 4.52 | 3.54 | 3.11 | 3.44 | 4.60 | 5.12 | 4.48 | 6.81 |
| %% | 4.21 | 3.52 | 6.21 | 34.4 | 16.4 | 5.54 | 4.34 | 3.81 | 4.21 | 5.63 | 6.27 | 5.49 | 100. |
Zapadnaya Dvina at Polotck
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| 1936 | - | - | - | - | - | - | - | - | - | 105. | 169. | 255. | - |
| 1937 | 170. | 94.3 | 468. | 828. | 310. | 107. | 75.0 | 139. | 77.5 | 70.1 | 104. | 143. | 215. |
| 1938 | 117. | 116. | 875. | 1010. | 391. | 107. | 83.3 | 56.5 | 51.0 | 57.0 | 70.3 | 47.9 | 249. |
| 1939 | 41.8 | 186. | 105. | 595. | 406. | 129. | 68.8 | 45.1 | 40.6 | 46.0 | 50.4 | 54.6 | 147. |
| 1940 | 35.6 | 31.5 | 40.3 | 929. | 381. | 105. | 59.9 | 69.2 | 91.7 | 242. | 318. | 217. | 210. |
| 1941 | - | - | 113. | 1490. | 1150. | - | - | - | - | - | - | - | - |
| 1942 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1943 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1944 | - | - | - | - | - | - | - | 86.1 | 66.8 | 69.5 | 89.7 | 80.7 | - |
| 1945 | 49.4 | 52.2 | 123. | 1060. | 503. | 142. | 115. | 408. | 336. | 475. | 375. | 135. | 314. |
| 1946 | 94.6 | 81.4 | 186. | 1350. | 615. | 130. | 93.0 | 75.8 | 125. | 317. | 142. | 65.1 | 273. |
| 1947 | 49.8 | 53.8 | 150. | 1900. | 639. | 249. | 99.6 | 88.9 | 111. | 106. | 118. | 313. | 323. |
| 1948 | 207. | 317. | 165. | 1400. | 259. | 104. | 139. | 78.3 | 88.2 | 135. | 254. | 196. | 279. |
| 1949 | 94.0 | 70.2 | 98.8 | 1240. | 477. | 134. | 204. | 182. | 161. | 106. | 112. | 191. | 256. |
| 1950 | 89.0 | 80.6 | 196. | 1140. | 390. | 190. | 353. | 311. | 231. | 233. | 398. | 372. | 332. |
| 1951 | 157. | 97.2 | 123. | 1810. | 403. | 205. | 87.6 | 62.0 | 57.9 | 57.1 | 53.6 | 70.3 | 265. |
| 1952 | 63.5 | 61.9 | 55.2 | 489. | 379. | 172. | 119. | 119. | 427. | 946. | 690. | 233. | 313. |
| 1953 | 212. | 132. | 158. | 2130. | 662. | 290. | 267. | 318. | 390. | 399. | 222. | 195. | 448. |
| 1954 | 110. | 77.3 | 84.2 | 770. | 450. | 122. | 91.7 | 114. | 155. | 333. | 340. | 197. | 237. |
| 1955 | 173. | 206. | 148. | 1160. | 1450. | 349. | 130. | 86.5 | 77.9 | 94.5 | 121. | 103. | 342. |
| 1956 | 86.5 | 75.5 | 69.9 | 1560. | 1650. | 229. | 113. | 116. | 188. | 220. | 145. | 190. | 387. |
| 1957 | 140. | 238. | 230. | 1110. | 572. | 307. | 168. | 231. | 505. | 783. | 358. | 154. | 400. |
| 1958 | 187. | 192. | 287. | 1730. | 1330. | 243. | 145. | 151. | 122. | 249. | 390. | 315. | 445. |
| 1959 | 329. | 237. | 367. | 1520. | 405. | 127. | 90.7 | 60.9 | 60.5 | 69.2 | 73.9 | 52.6 | 283. |
| 1960 | 64.7 | 56.6 | 56.2 | 657. | 350. | 111. | 141. | 87.4 | 163. | 136. | 443. | 604. | 239. |
| 1961 | 357. | 196. | 734. | 836. | 367. | 129. | 79.7 | 167. | 248. | 142. | 128. | 186. | 297. |
| 1962 | 171. | 139. | 121. | 1790. | 697. | 315. | 900. | 445. | 324. | 299. | 447. | 369. | 501. |
| 1963 | 150. | 104. | 92.1 | 898. | 496. | 156. | 103. | 78.5 | 72.3 | 88.4 | 147. | 123. | 209. |
| 1964 | 85.6 | 71.1 | 69.3 | 970. | 420. | 131. | 53.9 | 53.1 | 56.6 | 65.0 | 87.9 | 181. | 187. |
| 1965 | 104. | 83.0 | 94.9 | 984. | 716. | 447. | 114. | 111. | 97.6 | 86.9 | 86.0 | 110. | 253. |
| 1966 | 108. | 80.8 | 464. | 1910. | 518. | 134. | 80.6 | 77.6 | 68.7 | 75.5 | 90.5 | 71.1 | 307. |
| 1967 | 64.3 | 63.7 | 263. | 1180. | 410. | 162. | 73.3 | 59.3 | 63.8 | 74.6 | 175. | 134. | 227. |
| 1968 | 96.4 | 73.8 | 237. | 1640. | 526. | 139. | 119. | 88.8 | 65.9 | 86.0 | 125. | 83.2 | 273. |
| 1969 | 70.8 | 62.4 | 59.6 | 685. | 381. | 204. | 94.1 | 63.3 | 59.3 | 73.5 | 216. | 388. | 196. |
| 1970 | 120. | 91.6 | 90.2 | 1740. | 881. | 167. | 86.4 | 76.5 | 68.8 | 81.9 | 218. | 159. | 315. |
| 1971 | 132. | 167. | 204. | 1140. | 348. | 175. | 114. | 74.8 | 86.2 | 174. | 270. | 202. | 257. |
| 1972 | 153. | 78.4 | 134. | 760. | 418. | 385. | 140. | 67.3 | 52.0 | 65.8 | 118. | 237. | 217. |
| 1973 | 96.1 | 71.4 | 167. | 976. | 478. | 220. | 88.5 | 76.5 | 63.7 | 80.8 | 11.2 | 84.9 | 201. |
| 1974 | 99.9 | 90.0 | 225. | 635. | 338. | 193. | 402. | 167. | 90.7 | 104. | 183. | 272. | 233. |
| 1975 | 406. | 217. | 645. | 1230. | 331. | 203. | 91.7 | 64.4 | 60.6 | 62.5 | 63.3 | 61.6 | 286. |
| 1976 | 67.9 | 64.7 | 7.51 | 826. | 596. | 267. | 172. | 84.2 | 75.1 | 64.9 | 104. | 150. | 207. |
| 1977 | 106. | 78.0 | 217. | 1240. | 340. | 147. | 137. | 266. | 159. | 173. | 307. | 173. | 279. |
| 1978 | 155. | 106. | 359. | 1360. | 977. | 251. | 130. | 94.0 | 131. | 408. | 436. | 237. | 387. |
| 1979 | 136. | 94.2 | 168. | 1260. | 627. | 124. | 101. | 137. | 104. | 104. | 95.5 | 149. | 258. |
| 1980 | 115. | 93.7 | 90.5 | 741. | 592. | 154. | 255. | 233. | 341. | 328. | 376. | 340. | 305. |
| 1981 | 392. | 232. | 467. | 1050. | 356. | 114. | 83.6 | 64.6 | 93.3 | 193. | 383. | 231. | 305. |
| 1982 | 243. | 163. | 258. | 1130. | 463. | 254. | 228. | 209. | 108. | 111. | 141. | 242. | 296. |
| 1983 | 346. | 301. | 303. | 1200. | 349. | 147. | 105. | 104. | 69.5 | 76.0 | 81.1 | 87.7 | 264. |
| 1984 | 136. | 124. | 85.8 | 740. | 238. | 132. | 136. | 88.6 | 132. | 312. | 198. | 113. | 203. |
| 1985 | 74.9 | 91.4 | 84.1 | 1140. | 602. | 189. | 116. | 131. | 380. | 442. | 520. | 221. | 333. |