叶城波龙7.20泥石流应急调查及灾害链实时观察
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摘要
针对叶城柯克亚乡波龙7.20突发泥石流灾害,现场开展了应急科学调查。对沟下游泥石流堆积区进行量测,对上游突发小型滑坡-堰塞湖-泄流全过程开展实时观察。结果发现:泥石流固体物质主要是晚更新世风积土滑坡和中元古变质岩及碳酸盐岩崩塌,水体来源主要是强降雨导致的上游洪水及堰塞湖溃决;沟谷上游以稀性泥石流为主,下游加入了崩塌块体及河道砂砾石,粘度有所增大;堆积区呈块石散落和淤积状态。据现场多个老堰塞坝推测,波龙沟泥石流发生周期约15～20年。现有停车场位于沟口堆积区,需加大极端洪水及泥石流排泄空间,拓宽排导沟槽净空。
In response to the sudden debris flow disaster on July 20 th in the Polong Valley of Yecheng County, an emergency scientific investigation was carried out on this site. The debris flow accumulation area downstream of the ditch was measured, and the whole process of the small landslide, blocked lake and discharge flow in the upstream were observed in real time. It is found that the solid materials of the debris flow are mainly the Late Pleistocene Aeolian landslide and the Mesoproterozoic metamorphic rocks and carbonate rock collapse. The water resource is mainly from the upstream flood and the outburst of the dammed lake caused by the heavy rainfall. The upper part of the valley is dominated by dilute debris flow, while the viscosity of the downstream debris flow is increased due to the addition of the collapsed rocks and the stream bed gravels. In the accumulation area, the block stones are scattered and deposited. According to several old landslide dams in the valley, the occurrence cycle of the debris flow in the Polong Valley is estimated to be15～20 ys. The parking site is located in the accumulation area, so it is necessary to increase the discharge space and widen the drainage culvert.
In response to the sudden debris flow disaster on July 20 th in the Polong Valley of Yecheng County, an emergency scientific investigation was carried out on this site. The debris flow accumulation area downstream of the ditch was measured, and the whole process of the small landslide, blocked lake and discharge flow in the upstream were observed in real time. It is found that the solid materials of the debris flow are mainly the Late Pleistocene Aeolian landslide and the Mesoproterozoic metamorphic rocks and carbonate rock collapse. The water resource is mainly from the upstream flood and the outburst of the dammed lake caused by the heavy rainfall. The upper part of the valley is dominated by dilute debris flow, while the viscosity of the downstream debris flow is increased due to the addition of the collapsed rocks and the stream bed gravels. In the accumulation area, the block stones are scattered and deposited. According to several old landslide dams in the valley, the occurrence cycle of the debris flow in the Polong Valley is estimated to be15～20 ys. The parking site is located in the accumulation area, so it is necessary to increase the discharge space and widen the drainage culvert.
引文
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[10]尚彦军,杨志法,袁广祥,等.雅鲁藏布江大拐弯北部川藏公路地质灾害发育与分布研究[M].北京:中国铁道出版社,2010,18-19.
[11]侯新强.改建铁路南疆线吐鲁番至库尔勒段二线工程地质灾害浅析[J].西部探矿工程, 2010,(12):4-6.
(1)新疆农业大学硕士论文.新疆泥石流危害性研究及其危险度评价,2005
(2)新疆大学硕士生论文.新疆叶城县泥石流灾害易发性评价,2018
(1)新疆大学硕士生论文.新疆叶城县泥石流灾害易发性评价,2018
[2]曾庆利,尚彦军,胡桂胜,等.新疆叶城“7.6”滑坡泥石流灾害调查与形成机理研究[J].工程地质学报,2016, 24(6):1145-1156.
[3]胡桂胜,尚彦军,曾庆利,等.新疆叶城“7.6”特大灾害性泥石流应急科学调查[J].山地学报,2017, 35(1):112-116.
[4]河南省地质调查院.叶城县地质图(1:25万)[N].2005.
[5]肖安成.塔里木盆地西南坳陷柯克亚构造的形成与油气聚集规律[C].油气成藏机理及油气资源评价国际研讨会,北京,1996,116-120,325.
[6]潘家伟,李海兵, Jerome Van Der Woerd,等.西昆仑山前冲断带晚新生代构造地貌特征[J].地质通报,2007, 26(10):1368-1379.
[7]周必凡,李德基,罗德富,等.泥石流防治指南[M].北京:科学出版社,1991,125-129.
[8]陈光曦,王继康,王林海.泥石流防治[M].北京:中国铁道出版社,1983,151-162.
[9]陈宁生,杨成林,周伟,等.泥石流勘查技术[M].北京:科学出版社,2011,55-60.
[10]尚彦军,杨志法,袁广祥,等.雅鲁藏布江大拐弯北部川藏公路地质灾害发育与分布研究[M].北京:中国铁道出版社,2010,18-19.
[11]侯新强.改建铁路南疆线吐鲁番至库尔勒段二线工程地质灾害浅析[J].西部探矿工程, 2010,(12):4-6.
(1)新疆农业大学硕士论文.新疆泥石流危害性研究及其危险度评价,2005
(2)新疆大学硕士生论文.新疆叶城县泥石流灾害易发性评价,2018
(1)新疆大学硕士生论文.新疆叶城县泥石流灾害易发性评价,2018
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