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在多年水文数据的基础上,分析了塔里木河中游1957~2002年间径流年际变化及1992~2002年径流月际变化的特点、趋势及其原因和影响。得出1957~2002年间塔里木河中游径流不稳定、不平衡,并且径流呈逐渐减小的趋势,其主要原因是源流区和上游区大量引水所致;塔里木河径流月际变化呈明显的西北型河流的特点,在7~9月为洪水期,水量可占全年水量的79.31%,4~6月份由于农业用水,导致径流量下降。塔里木河径流的这些特点给水资源管理加大了难度。
Based on the multi-year hydrological data, the characteristics of inter-annual runoff variation in the middle reaches of the Tarim River from 1957 to 2002 and the monthly variation of runoff from 1992 to 2002 were analyzed. The causes and effects were also analyzed. The results show that the runoff in the middle reaches of the Tarim River was unstable and unbalanced from 1957 to 2002, and the runoff tended to decrease gradually. The main reason was the large amount of water diversion from the source and upstream areas. The monthly variation of the Tarim River runoff was obviously northwest The characteristics of the river are flood periods from July to September, with the amount of water accounting for 79.31% of the annual total amount of water. As a result of agricultural water use in April-June, the runoff is declining. These characteristics of Tarim River runoff have made it more difficult for water resources management.