Quantifying provenance of reservoir sediment using multiple composite fingerprints in an arid region experiencing both wind and water erosion
Quantifying provenance of reservoir sediment using multiple composite fingerprints in an arid region experiencing both wind and water erosion
复制标题
在经历风蚀和水蚀的干旱地区使用多重复合指纹量化水库沉积物的来源
DOI：
10.1016/j.geomorph.2019.02.011
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发表时间：
2019-05
期刊：
影响因子：
--
通讯作者：
Zhishan An
中科院分区：
文献类型：
--
作者：
Baicheng Niu;Jianjun QU;Xunchang John Zhang;Benli Liu;Lihai Tan;Zhishan An
沉积物来源的定量信息有助于制定有效控制流域土壤侵蚀的有针对性的保护措施。在本研究中，测试了多重复合指纹方法，用于量化党河的沉积物来源，并为遭受风蚀和水蚀的干旱地区的流域提供有效的沉积物控制策略。地表样品取自沙丘、戈壁和上游山脉三个地貌源区；以及水库附近水道的沉积物样本。为了适应河流和风成过程产生的广泛的沉积物尺寸分布，对六个颗粒尺寸组中的每个组的每个来源的沉积物贡献进行了估计。结果表明，各水源对水库沉积物的贡献比例为：上游山地占56.73%，戈壁占26.36%，沙丘占16.91%，各规模组的相对贡献趋势相似。沉积物中0.063~0.1mm粒径组的沉积物占比最大，约占总量的37.09%，其中沙丘、戈壁和上游山地分别占4%、7.59%和25.50%。研究结果还表明，两种侵蚀过程都存在选择性侵蚀，尤其是风蚀过程，在选择性侵蚀严重的情况下应采用多重粒径跟踪，以提高估算的准确性。沙丘单位面积泥沙贡献率最大；因此，建议通过稳定沙丘来控制风沙入河，以减少水库淤积。
Quantitative information on sediment sources is useful for developing targeted protection measures that effectively control soil erosion in a watershed. In this study, a multiple composite fingerprints method was tested and used for quantifying the sediment provenance of the Danghe River, and for providing effective sediment control strategies for the watershed in an arid region experiencing both wind and water erosion. Surface samples were taken from three geomorphic source areas of dunes, gobi, and upstream mountains; and sediment samples from the watercourses near the reservoir. To accommodate the wide range of sediment size distributions resulting from the fluvial and aeolian processes, sediment contributions from each source were estimated for each of six particle size groups. The results showed that the proportional contributions from each source to the reservoir sediments were 56.73% from upstream mountains, 26.36% from gobi, and 16.91% from dunes, with the relative contributions in each size group following a similar trend. The largest fraction of the sediment was from the 0.063–0.1 mm particle size group, accounting for about 37.09% of the total, in which 4%, 7.59%, and 25.50% were from dunes, gobi, and upstream mountains. Our results also indicated that selective erosion existed in both erosion processes, especially in wind erosion process, and multiple particle size tracking should be used in the cases of severe selective erosion to improve the accuracy of estimation. Also, the sediment contribution rate per unit area was the largest from dunes; thus, controlling wind-blown sand to the river by stabilizing the dunes is recommended to reduce the reservoir siltation.
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DOI：
10.1016/j.scitotenv.2015.03.134
发表时间：
2015-09
期刊：
The Science of the total environment
影响因子：
--
作者：
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通讯作者：
P. Theuring;A. Collins;M. Rode
DOI：
--
发表时间：
2002-08
期刊：
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影响因子：
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影响因子：
2.5
作者：
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影响因子：
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作者：
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通讯作者：
H. Smith;W. Blake
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6.5
作者：
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Mingyi Yang;Jun Tian;Pu-ling Liu