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2007年7—9月,在喜马拉雅山中东段蒙达扛日冰川进行了水文和物质平衡的同步观测.结果表明:观测期间,蒙达扛日冰川表现为物质负平衡,冰川消融集中在7月和8月中上旬.观测的70 d内,花杆区冰川物质平衡量为-435～-711 mm,日平均值为-6.2～-10.2 mm.d-1,冰川的总物质平衡量为-355 mm.蒙达扛日冰川径流波动总体受气温控制,在冰川末端及其下游所设立的两个水文断面流域径流深分别为617 mm和530 mm,流域径流模数分别为102 L.s-1.km-2和88 L.s-1.km-2.水量平衡分析表明,上、下游断面控制流域内由冰川消融所贡献的流域径流深度分别为501 mm和417mm,其中埋藏冰融水、释放的冰裂隙蓄水等水体所贡献的流域径流深度分别为173 mm和210 mm.
During July-September 2007, a synchronized observation of the hydrological and matter balance was carried out in Mengda, the eastern part of the Himalayas, and the results showed that during the observation period, Mengda carrying the Japanese glaciers showed a negative material balance and glacial melting concentrated in July And in the first half of August, the glaucoma balance of Fenghuazhan area was -435 ~ -711 mm and the daily average was -6.2 ~ -10.2 mm.d-1 in the 70 days. The total mass balance of glaciers was - 355 mm. The runoff fluctuations of Mondar carry-on glacier runoff are generally controlled by temperature. The runoff depths of the two hydrological sections at the end of the glacier and its downstream are 617 mm and 530 mm, respectively. The runoff modulus of the runoff is 102 Ls-1. km-2 and 88 Ls-1.km-2. The water balance analysis shows that the runoff depths of the watersheds contributed by glacier ablation are 501 mm and 417 mm, respectively, in the upstream and downstream section control watersheds, in which the buried ice melt water and the released ice The runoff depth contributed by waters such as fissures and reservoirs is 173 mm and 210 mm, respectively.