Causes and controlling pattern of sand hazards at the Danghe Reservoir of Dunhuang in Northwest China
Causes and controlling pattern of sand hazards at the Danghe Reservoir of Dunhuang in Northwest China
复制标题
西北敦煌党河水库沙害成因及治理模式
DOI：
10.1007/s11629-016-4067-3
复制
发表时间：
2016-10
影响因子：
2.5
通讯作者：
Yingjun Pang
中科院分区：
文献类型：
--
作者：
Shengbo Xie;Jianjun Qu;Yingjun Pang
敦煌党河水库风沙危害严重，致灾机制尚不明确，治沙效果不佳。采用粒度分析、风况及输沙现场观测分析、流沙势计算等方法，对库区沙质来源、风沙动力环境、库区治理措施等进行了研究。据此，查明砂质物质主要来自库区北侧的鸣沙山。此外，0.50-0.25毫米和0.25-0.10毫米范围内的砂粒占主导地位。盛行移沙风为N向，占全年的15.38%，与沙源方向一致，加剧了库区风沙灾害的严重性。年沙DP为1386.59 VU，年RDP为567.31 VU，年RDP/DP为0.41，年RDD为183.15°。在大风季节（主要是夏季），沙料被风从北向南吹动，然后被党河阻挡。沙料则以近似东西向的趋势移动到河道中并产生泥沙，从而造成灾害。提出党河水库防沙格局以外缘拦沙、内缘固沙为主。防风固沙控制沙质物质流入河道，对于减缓党河水库的淤积、延长使用寿命具有重要作用。
Sand hazards are serious at the Danghe Reservoir of Dunhuang, and efforts to control sand are ineffective because disaster-causing mechanisms are currently unclear. The source of sandy materials, dynamic environment of blown sand, and controlling measures of the reservoir area are investigated using different methods, such as granularity analyses, wind regime and sand transport field observation and analyses, sand drift potential calculation. Accordingly, the sandy materials are found to derive chiefly from the Mingsha Mountain on the north side of the reservoir area. In addition, sand grain in the range of 0.50-0.25 mm and 0.25-0.10 mm are dominant. The prevailing sand-moving wind originates from the N direction, accounting for 15.38% of the yearly total, which coincides in the same direction with sand source, thereby increasing the severity of sand hazards in the reservoir area. The yearly sand DP is 1386.59 VU, the yearly RDP is 567.31 VU, the yearly RDP/DP is 0.41, and the yearly RDD is 183.15°. In the windy season (mainly in summer), sand materials are blown by wind from north to south, and then blocked by the Danghe River. The sand materials then move with an approximate east-west trend into the river channel and produce sediment, thereby causing a disaster. We propose that the sand-controlling pattern of the Danghe Reservoir is dominated by sand blocking in the outer fringe and sand fixing in the inner fringe. Applying windbreak and sand fixation to control sandy material movement into the river channel plays an important role in retarding sedimentation and extending the useful life of the Danghe Reservoir.
登录
查看更多内容
影响因子：
3.9
作者：
K. I. Pearce;I. Walker
通讯作者：
K. I. Pearce;I. Walker
影响因子：
6.2
作者：
W. Ta;X. Jia;Haibing Wang
通讯作者：
W. Ta;X. Jia;Haibing Wang
影响因子：
3.9
作者：
Hongya Wang;Lin-hai Xu;X. Sun;Minghui Lu;Xiaoya Du;Yuying Huo;I. Snowball
通讯作者：
Hongya Wang;Lin-hai Xu;X. Sun;Minghui Lu;Xiaoya Du;Yuying Huo;I. Snowball
影响因子：
3
作者：
Heqiang Du;X. Xue;Tao Wang
通讯作者：
Heqiang Du;X. Xue;Tao Wang
DOI：
10.1504/ijhst.2014.067733
发表时间：
2014
影响因子：
1.8
作者：
M. Valipour;S. Eslamian
通讯作者：
M. Valipour;S. Eslamian