Identification of the deposited layers in landslides reservoir and investigation of the sediment yields during the later sixteenth century on the Hill Loess Plateau, China
Identification of the deposited layers in landslides reservoir and investigation of the sediment yields during the later sixteenth century on the Hill Loess Plateau, China
复制标题
黄土丘陵高原滑坡水库沉积层识别及16世纪后期产沙量调查
DOI：
10.1007/s11434-008-0466-3
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发表时间：
2008-11
影响因子：
--
通讯作者：
中科院分区：
文献类型：
--
作者：
黄土高原丘陵地区存在大量的集沙水库。选取黄土洼小流域作为研究区域，在垂直长度为12.73 m的沉积物剖面中采集样品。通过细粒含量和花粉浓度的变化，鉴定出54对洪水对。以冻融扰动结构作为最近一次洪水对的标志，确定了这54次洪水发生在31年内。采用金字塔体积计算公式，洪水产沙量在716 ~ 30376 t·km−2之间。平均产沙量为7106 t·km−2。年产沙量在968 ~ 55579 t·（km2·a）−1之间变化，平均值为12629 t·（km2·a）−1。与现代淮宁河年输沙量相比，450年前黄土瓦地区的侵蚀速率与现代侵蚀速率相似。第27 ~ 31年，年平均产沙量急剧增加，达到31309 t·（km2·a）−1。这表明，滑坡灾害后对流域内植被已经恢复的废弃地进行复垦，造成了流域内非常严重的水土流失。
There are many sediment trapping reservoirs in the Hill Loess Plateau. The Huangtuwa small catchment is selected as a research field where samples were collected in a sediment deposit profile with a vertical length of 12.73 m. By the variation of fine particle content and pollen concentration, 54 flood couples were identified. Taking the freeze-thawing disturbed texture as the sign of the latest flood couple in a year, it is ascertained that those 54 floods should happen in 31 years. Using pyramid volume calculation formula, the sediment yields of flood ranged between 716–30376 t · km−2. The average sediment yield was 7106 t · km−2. The annual sediment yields varied between 968–55579 t·(km2· a)−1, and the average value is 12629 t · (km2· a)−1. Compared with the modern annual sediment discharge of the Huaining River, the erosion rate in the Huangtuwa region 450 years ago was similar to the modern erosion rate. In the period from the 27th year to the 31st year, the average annual sediment yield increased sharply to 31309 t · (km2· a)−1. It implied that re-reclamation of the abandoned land in the catchment since the landslide disaster, where vegetation had rehabilitated already, caused very severe soil erosion in the catchment.
影响因子：
5.7
作者：
Z. Xinbao;Weng ZhongMing;Feng Ming-yi;Y. Qinke;Zhang Jinjun
通讯作者：
Z. Xinbao;Weng ZhongMing;Feng Ming-yi;Y. Qinke;Zhang Jinjun