Lake catchment based studies of erosion and denudation in the merevale catchment, Warwickshire, U.K.
Lake catchment based studies of erosion and denudation in the merevale catchment, Warwickshire, U.K.
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基于英国沃里克郡梅雷瓦莱流域的湖泊流域侵蚀和剥蚀研究
DOI：
10.1002/esp.3290100108
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发表时间：
1985
影响因子：
3.3
通讯作者：
P. Appleby
中科院分区：
文献类型：
--
作者：
I. Foster;J. Dearing;A. Simpson;A. Carter;P. Appleby
将通过对北沃里克郡 Merevale 森林覆盖的流域的悬浮沉积物的当代河流监测估算出的沉积物产量与通过下游水库的湖泊沉积物分析获得的沉积物产量记录进行比较。自 1861 年以来的九个时期的总沉积物体积和质量是通过外推 54 个岩心的同步水平（通过磁化率和其他磁测量确定）并使用 210Pb 和 137Cs 分析来计算的，以提供绝对沉积物年代学。两种方法估算的沉积物产量显示，沉积物流失水平相当，但较低（50-200 kg ha−1 yr−1）。虽然表明湖泊沉积物可以成为延长当代监测期限的有效手段，但该研究强调需要详细的土地利用和气候历史记录，以便评估长期沉积物产量记录。
Sediment yields estimated from contemporary stream monitoring of suspended sediment in the Merevale forested catchment, North Warwickshire, were compared with the sediment yield record obtained from analysis of lake sediment in the downstream reservoir. Total sediment volume and mass for nine periods since 1861 were calculated by extrapolation of synchronous levels in 54 cores, identified from magnetic susceptibility and other magnetic measurements, and by using 210Pb and 137Cs analysis to provide an absolute sediment chronology. Sediment yield estimated from the two methods show comparable but low (50-200 kg ha−1 yr−1) levels of sediment loss. While suggesting that lake sediments can be a useful means for extending the period over which contemporary monitoring exists, the study stresses the need for detailed historical records of land use and climate against which long term sediment yield records can be evaluated.