Continent: |
Asia | Latitude: |
54.58 | deg. |
Country: |
Russia | Longitude: |
100.62 |
deg. |
River: |
Iya | Elevation: |
448.9 |
m |
Station: |
Tulun | Area: |
14500.0 |
km2 |
| Mean for Observation Period: | 1936 | - | 1988 | Total months: | 627 |
| - | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| m3/c | 20.9 | 15.2 | 13.5 | 61.4 | 237. | 365. | 369. | 350. | 244. | 124. | 42.4 | 31.0 | 156. |
| mm | 3.87 | 2.56 | 2.50 | 11.0 | 43.8 | 65.2 | 68.1 | 64.7 | 43.6 | 22.9 | 7.58 | 5.74 | 340. |
| km3 | 0.056 | 0.037 | 0.036 | 0.16 | 0.64 | 0.95 | 0.99 | 0.94 | 0.63 | 0.33 | 0.11 | 0.083 | 4.93 |
| l/s/km2 | 1.44 | 1.05 | 0.93 | 4.24 | 16.4 | 25.1 | 25.4 | 24.1 | 16.8 | 8.56 | 2.92 | 2.14 | 10.8 |
| %% | 1.12 | 0.81 | 0.72 | 3.28 | 12.7 | 19.5 | 19.7 | 18.7 | 13.0 | 6.63 | 2.26 | 1.66 | 100. |
Iya at Tulun
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| 1936 | - | - | - | 19.6 | 249. | 320. | 633. | 423. | 272. | 155. | - | - | - |
| 1937 | - | - | 17.6 | 45.7 | 332. | 280. | 615. | 355. | 304. | 156. | - | - | - |
| 1938 | 18.7 | 14.6 | 13.6 | 136. | 267. | 340. | 277. | 376. | 305. | 143. | 58.3 | 35.2 | 165. |
| 1939 | 21.5 | 17.3 | 16.3 | 115. | 174. | 501. | 511. | 374. | 136. | 73.8 | 33.7 | 25.0 | 167. |
| 1940 | 19.3 | 15.4 | 13.7 | 84.8 | 207. | 694. | 299. | 316. | 230. | 97.1 | 27.2 | 18.3 | 168. |
| 1941 | 15.0 | 16.7 | 15.3 | 37.9 | 368. | 389. | 426. | 488. | 242. | 98.5 | 30.8 | 17.9 | 179. |
| 1942 | 18.1 | 18.9 | 13.7 | 52.7 | 136. | 373. | 285. | 169. | 133. | 74.2 | 30.5 | 19.7 | 110. |
| 1943 | 11.6 | 10.1 | 12.6 | 87.4 | 113. | 210. | 165. | 172. | 203. | 105. | 22.6 | 12.3 | 93.7 |
| 1944 | 9.50 | 8.10 | 7.10 | 87.9 | 220. | 480. | 454. | 378. | 618. | 194. | 38.6 | 22.6 | 210. |
| 1945 | 20.6 | 16.5 | 12.0 | 144. | 205. | 250. | 280. | 256. | 187. | 127. | 43.8 | 19.6 | 130. |
| 1946 | 15.5 | 14.6 | 14.5 | 58.2 | 160. | 409. | 481. | 338. | 404. | 190. | 45.9 | 26.8 | 180. |
| 1947 | 19.0 | 14.4 | 13.1 | 155. | 195. | 305. | 363. | 533. | 405. | 174. | 47.0 | 35.0 | 188. |
| 1948 | 28.1 | 16.4 | 18.0 | 123. | 184. | 360. | 291. | 347. | 182. | 115. | 41.5 | 32.1 | 145. |
| 1949 | 19.7 | 14.4 | 15.0 | 61.6 | 179. | 282. | 417. | 386. | 312. | 109. | 45.2 | 33.5 | 156. |
| 1950 | 16.7 | 14.8 | 13.0 | 34.3 | 252. | 406. | 241. | 400. | 276. | 156. | 47.1 | 34.9 | 158. |
| 1951 | 23.4 | 15.1 | 12.8 | 33.7 | 349. | 217. | 243. | 207. | 184. | 84.6 | 32.8 | 25.9 | 119. |
| 1952 | 21.6 | 16.4 | 12.1 | 25.5 | 257. | 666. | 687. | 523. | 314. | 164. | 46.8 | 34.2 | 231. |
| 1953 | 28.2 | 21.0 | 18.3 | 102. | 207. | 263. | 509. | 357. | 157. | 97.2 | 30.9 | 30.3 | 152. |
| 1954 | 22.6 | 16.4 | 14.2 | 22.5 | 171. | 345. | 434. | 312. | 195. | 124. | 46.6 | 28.6 | 144. |
| 1955 | 11.6 | 10.4 | 11.3 | 52.7 | 320. | 533. | 473. | 293. | 212. | 116. | 44.5 | 32.8 | 176. |
| 1956 | 21.8 | 16.6 | 13.7 | 45.4 | 268. | 271. | 234. | 284. | 276. | 101. | 46.1 | 38.2 | 135. |
| 1957 | 19.5 | 13.2 | 10.8 | 33.0 | 194. | 376. | 157. | 230. | 242. | 124. | 42.7 | 29.3 | 123. |
| 1958 | 25.2 | 17.4 | 11.5 | 64.8 | 210. | 348. | 217. | 324. | 166. | 95.5 | 26.4 | 18.9 | 127. |
| 1959 | 19.8 | 15.9 | 14.9 | 48.3 | 212. | 549. | 285. | 319. | 205. | 109. | 39.5 | 32.4 | 154. |
| 1960 | 23.7 | 18.9 | 16.3 | 67.1 | 146. | 340. | 286. | 516. | 353. | 151. | 57.5 | 40.0 | 168. |
| 1961 | 23.7 | 16.8 | 15.0 | 90.0 | 180. | 310. | 492. | 442. | 248. | 134. | 34.9 | 29.4 | 168. |
| 1962 | 20.3 | 10.9 | 7.70 | 66.6 | 234. | 366. | 614. | 235. | 152. | 120. | 31.0 | 29.8 | 157. |
| 1963 | 26.1 | 19.5 | 18.2 | 27.7 | 208. | 423. | 547. | 305. | 212. | 94.0 | 29.4 | 38.1 | 162. |
| 1964 | 30.6 | 12.3 | 9.10 | 30.0 | 287. | 218. | 298. | 253. | 206. | 92.1 | 29.8 | 25.1 | 124. |
| 1965 | 21.1 | 14.4 | 10.8 | 12.1 | 389. | 256. | 291. | 290. | 270. | 145. | 41.7 | 35.3 | 148. |
| 1966 | 20.6 | 12.6 | 12.3 | 16.9 | 326. | 413. | 424. | 582. | 210. | 126. | 40.1 | 27.8 | 184. |
| 1967 | 14.7 | 12.7 | 11.0 | 80.0 | 248. | 336. | 297. | 548. | 238. | 118. | 29.3 | 24.3 | 163. |
| 1968 | 17.6 | 10.4 | 14.4 | 67.3 | 201. | 257. | 195. | 266. | 234. | 134. | 29.4 | 22.3 | 121. |
| 1969 | 15.9 | 11.5 | 9.90 | 65.0 | 280. | 295. | 222. | 232. | 208. | 122. | 46.1 | 40.6 | 129. |
| 1970 | 19.9 | 20.0 | 16.4 | 71.1 | 316. | 400. | 355. | 252. | 228. | 171. | 56.1 | 40.0 | 162. |
| 1971 | 19.9 | 13.5 | 8.70 | 55.5 | 146. | 193. | 231. | 356. | 208. | 111. | 47.8 | 28.9 | 118. |
| 1972 | 20.0 | 12.2 | 8.10 | 56.4 | 157. | 399. | 444. | 295. | 245. | 110. | 52.0 | 47.6 | 154. |
| 1973 | 29.7 | 18.9 | 18.4 | 109. | 294. | 619. | 454. | 294. | 165. | 79.2 | 42.1 | 33.1 | 180. |
| 1974 | 17.7 | 6.20 | 5.00 | 53.6 | 231. | 298. | 230. | 190. | 182. | 122. | 37.0 | 24.2 | 116. |
| 1975 | 19.3 | 15.4 | 13.0 | 54.2 | 277. | 318. | 259. | 359. | 320. | 134. | 42.4 | 29.8 | 153. |
| 1976 | 21.4 | 17.2 | 19.8 | 32.3 | 196. | 351. | 371. | 341. | 156. | 76.5 | 32.2 | 27.0 | 137. |
| 1977 | 14.6 | 10.2 | 7.90 | 48.5 | 223. | 506. | 393. | 282. | 156. | 90.3 | 51.8 | 36.3 | 152. |
| 1978 | 23.3 | 17.2 | 17.5 | 66.1 | 223. | 469. | 368. | 364. | 206. | 85.0 | 44.4 | 28.4 | 159. |
| 1979 | 17.0 | 13.4 | 14.3 | 34.2 | 330. | 278. | 179. | 221. | 249. | 138. | 45.9 | 42.4 | 130. |
| 1980 | 27.7 | 17.8 | 16.8 | 49.3 | 305. | 453. | 248. | 757. | 183. | 102. | 33.4 | 29.0 | 185. |
| 1981 | 18.3 | 19.1 | 19.0 | 96.8 | 188. | 275. | 217. | 532. | 219. | 116. | 56.0 | 40.6 | 150. |
| 1982 | 18.7 | 12.7 | 9.60 | 69.9 | 362. | 364. | 320. | 173. | 169. | 105. | 41.4 | 39.8 | 140. |
| 1983 | 26.4 | 17.0 | 13.1 | 16.3 | 156. | 321. | 279. | 251. | 271. | 136. | 52.7 | 35.2 | 131. |
| 1984 | 32.5 | 20.1 | 14.2 | 27.4 | 248. | 257. | 731. | 383. | 162. | 98.2 | 43.7 | 24.4 | 170. |
| 1985 | 17.8 | 16.7 | 14.4 | 50.8 | 197. | 386. | 422. | 380. | 385. | 157. | 57.8 | 39.6 | 177. |
| 1986 | 28.3 | 15.9 | 13.0 | 31.4 | 359. | 382. | 476. | 437. | 386. | 192. | 64.9 | 42.0 | 202. |
| 1987 | 24.4 | 19.2 | 19.9 | 50.2 | 254. | 364. | 438. | 555. | 327. | 226. | 58.3 | 40.2 | 198. |
| 1988 | 29.5 | 18.4 | 14.4 | 89.6 | 189. | 312. | 493. | 302. | 220. | 114. | 65.1 | 38.8 | 157. |