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首页> 外文会议>Symposium on sediment dynamics for a changing future >Historic sediment yields in a small ungauged catchment controlled by a warping dam, using sediment deposition information and ~(137)Cs dating
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Historic sediment yields in a small ungauged catchment controlled by a warping dam, using sediment deposition information and ~(137)Cs dating

机译：历史沉积物在翘曲坝控制的小型未凝固集水区中，使用沉积物沉积信息和〜（137）CS约会

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摘要

In the hilly and gully region of the Loess Plateau, China, warping (check) dams are one of the most important engineering measures for controlling soil and water loss, and reducing downstream sediment yields. Based on detailed field observations, the sediment profile upstream of the third warping dam, located in a small ungauged watershed (Guandigou) of the Wangmaogou catchment, was divided into 31 sedimentary layers, and the sediment thickness and ~(137)Cs activity of each layer were measured. Peaks in ~(137)Cs activity in the sediment layers were equated to 1963 (peak in fallout) and 1986 (Chernobyl incident). These dated layers, in combination with historical information on erosive rainstorm events, were used to date the timing of sediment deposition for each layer. Based on the information on sediment thickness for the 31 layers, and field measurements of the surface area of each layer, the specific sediment yields from 1959 to 1987 were estimated. The results indicated that the approach, I.e. the combination of ~(137)Cs dating and the sediment record deposited upstream of a warping dam, could be used to study soil erosion and deposition in small ungauged watersheds in the Loess Plateau region of China.
机译：在黄土高原的丘陵和沟壑区，中国，翘曲（检查）水坝是控制土壤和水分损失最重要的工程措施之一，降低下游沉积物产量。基于详细的现场观察，位于王茂沟集水区的小型未凝固水坝（冠古）的第三张翘曲水坝上游的沉积物型材被分成31种沉积层，沉积物厚度和〜（137）Cs活性测量层。沉积物层中〜（137）Cs活性的峰值等于1963（辐射峰）和1986（切尔诺贝利事件）。这些日期的层与关于腐蚀暴雨事件的历史信息相结合，迄今为止对每层的沉积物沉积的时序日期。基于有关31层沉积物厚度的信息，以及每层表面积的场测量，估计了1959年至1987年的特定沉积物产量。结果表明该方法，即〜（137）Cs约会和沉积物沉积在翘曲大坝上游的沉积物，可用于研究中国黄土高原地区小未凝固流域的土壤侵蚀和沉积。

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