中文摘要：

碎片流动和山崩，广泛地沿着 Parlung Zangbo 发展并且经常发生，严重在 Bomi 从四川损坏高速公路到 Tiebt (G318 ) 县。灾难性的碎片在2007年9月4日 Tianmo 分水岭流动，2010年7月25日和2010年9月4日，堵住的 Parlung Zangbo 河和生产的建水坝的湖，其爆发流动由于在平台的脚上的强烈搜索在相反的河岸使 50 m 成为了高平台倒塌。作为结果，因为那 900 m 高速公路底是 destructed， 430 m 破产了，交通在 2010 被打断 16 天。这些碎片流动被冰川的融化开始它被连续更高的温度和下列集中的降雨导致，并且沿着隧道由冰碛膨胀了然后堵住了 Parlung Zangbo。在分水岭，密度，速度和碎片流动的山峰分泌物的插头是 2.06 t/m < 啜 class= “ a-plus-plus ” > 3 , 12.7 m/s 和 3334 m < 啜 class= “ a-plus-plus ” > 3 /s, 分别地。在进河的插头和免职体积的分泌物什么时候超过 2125 m <啜class=“ a-plus-plus ”> 3 /s 和 126 潩?景ㄠ?代???杩?潣牲汥瑡潩獮爠湡楧杮映潲???″潴???椠摮捩瑡?桴瑡???瑮牥浩挠畯摬挠灡畴敲琠敨愠湮慵?祣汣?敶祲眠汥??睯癥牥?湡愠敶慲敧爠潯?敭湡猭畱牡?牥潲?爨獭?漠??鰷????鈿???辮?鶝岑???额???鸿銾铌？

英文摘要：

Debris flows and landslides, extensively developing and frequently occurring along Parlung Zangbo, seriously damage the Highway from Sichuan to Tiebt（G318） at Bomi County. The disastrous debris flows of the Tianmo Watershed on Sept. 4, 2007, July 25, 2010 and Sept. 4, 2010, blocked Parlung Zangbo River and produced dammed lakes, whose outburst flow made 50 m high terrace collapse at the opposite bank due to intense scouring on the foot of the terrace. As a result, the traffic was interrupted for 16 days in 2010 because that 900 m highway base was destructed and 430 m ruined. These debris flows were initiated by the glacial melting which was induced by continuous higher temperature and the following intensive rainfall, and expanded by moraines along channels and then blocked Parlung Zangbo. At the outlet of watershed,the density, velocity and peak discharge of debris flow was 2.06 t/m3, 12.7 m/s and 3334 m3/s, respectively. When the discharge at the outlet and the deposition volume into river exceeds 2125 m3/s and 126×103 m3, respectively, debris flow will completely blocked Parlung Zangbo. Moreover,if the shear stress of river flow on the foot of terrace and the inclination angel of terrace overruns 0. 377 N/m2 and 26°, respectively, the unconsolidated terrace will be eroded by outburst flow and collapse. It was strongly recommended for mitigation that identify and evade disastrous debris flows, reduce the junction angel of channels between river and watershed, build protecting wall for highway base and keep appropriate distance between highway and the edge of unconsolidated terrace.