Discharge Characteristics and Changes over the Ob River Watershed in Siberia
Discharge Characteristics and Changes over the Ob River Watershed in Siberia
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DOI：
10.1175/1525-7541(2004)005
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发表时间：
2004-08
影响因子：
3.8
通讯作者：
Daqing Yang;B. Ye;A. Shiklomanov
中科院分区：
文献类型：
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作者：
Daqing Yang;B. Ye;A. Shiklomanov
摘要本研究分析了鄂毕河流域内主要子流域的长期（1936-90）月径流记录，以研究人类活动（特别是水库和农业活动）和自然变化引起的流量变化。径流格局的变化被认为是不同的上，下部分的Ob流域。在上鄂毕盆地，流量减少，在夏季和冬季增加。夏季的减少主要是由于沿着河谷的农业和工业用水以及水库调节以减少夏季高峰洪水。冬季径流量的增加是由于水库在冬季释放水用于发电。然而，在下Ob地区，流量增加，在仲夏和冬季的几个月，并在秋季弱下降。这些夏季流量的增加与夏季降水和冬季积雪的增加有关。
Abstract This study analyzes long-term (1936–90) monthly streamflow records for the major subbasins within the Ob River watershed in order to examine discharge changes induced by human activities (particularly reservoirs and agricultural activities) and natural variations. Changes in streamflow pattern were found to be different between the upper and lower parts of the Ob watershed. Over the upper Ob basin, streamflow decreases in summer months and increases in the winter season. The decreases in summer are mainly due to water uses along the river valley for agricultural and industrial purposes and to reservoir regulation to reduce the summer peak floods. The increases in winter streamflow are caused by reservoir impacts to release water for power generation over winter months. In the lower Ob regions, however, streamflow increased during midsummer and winter months and weakly decreased in autumn. These increases in summer flow are associated with increases in summer precipitation and winter snow cover ov...