STATISTICAL OBSERVATION OF SHIPS OF THE CASPIAN SEA BASIN AND THE VOLGA RIVER SYSTEM FOR EVALUATION OF THE ENGINE EXHAUST EMISSIONS
The statistical data on 245 ships of the Caspian Sea basin and the Volga river system and their power plants are collected. The engines, established on the ships of the Caspian Sea basin and the Volga river system were produced in 1952-2007; engines produced in 1980 are 28 %, in 1980-2000 - 67 %, in 2000 - 5 %. The ships are classified according to the characteristics of their power plants. The ships of pr. 1570, 1577 ("Nobel Brothers", "The Baron", "The Count", "NRW-39M", "Watan-1", etc.) are 16 %, pr. 630 (Kazan City", "Captain Permyakov" and others) - 8.6 %, pr. 621, 12911 ("Lena-neft-2070", "Anna", etc.) - 7.6 %, pr. 1575, 550 A-type "Volgoneft" - 7.3 %. To reduce the volume of tests in measuring ship emissions the selection was made; the minimum amount of this selection comprises 15 ships. The composition of the sample 5, 3, 2, 2, 1, 1, 1 corresponds to the main engines 6NVD48-2AU (485, 330), 6NVD48-2AU (515 300), 6 (8) NVDS48A2U (640 (852), 375), 8NVD48AU (736, 375), G70 (883, 375), 6NVD48-2AU (567, 330), 8NVD48-2U (647, 428). The probability 0.975 ensures 3 % error with a confidence interval 6.28-12.28 %. The investigations help to define the group of ships of the Caspian Sea basin and the Volga river system with the maximum toxic engine emission.