西藏易贡巨型滑坡水文抢险监测

西藏易贡巨型滑坡堵塞易负藏布江形成天然湖泊，对下游人民生命财产构成严重威胁。长江委水文科技抢险队奔赴灾区，利用声学多普勒流速剖面仪（ＡＤＣＰ）对迅速上涨的入湖流量、湖泊面积、容积进行了有效的监测，得到了精确的数据。采用ＡＤＣＰ法实测易贡湖入湖流量为５１８ｍ＾３／ｓ，并应用水量平均法对实测流量进行合理性分析，认炒ＡＤＣＰ法施测流量基本合理可靠。计算得到相应于坝前水位５４ｍ的湖泊面积为４４．４ｋｍ＾２

ADCP monitoring in emergency treatment of Yigong massive landslide in Tibet

The massive landslide occurring in Yigong, Tibet blocked up the Yigong Zangbu river and turned its upper reach area nearby into a natural lake, which posed a severe threat to lives and properties of the people in the lower reach area. The hydrological science and technology emergency team of the Changjiang Water Resources Commission rushed to the landslide disaster area and effectively monitored the inflow discharge, water surface area, the lake storage volume by means of Acoustic Doppler current profile meters (ADCP),etc., and obtained accurate data. The inflow discharge measured by ADCP method was 518 m\ 3/s. The water balance method was used to analyze the rationality of measured discharges and discharges measured by ADCP method were considered basically reasonable and reliable. The computed lake surface area corresponding to the lake water level of 54 m at the weir dam was 44.4 km\ 2, with its lake storage of 1.065 billion m\ 3, average lake width of 2 065 m, average water depth of 24.0 m. These data provided the headquarters of emergency treatment and disaster relief with reliable bases for decision making.