West University of Timișoara, Department of Geography, V. Pârvan, no. 4, Timișoara 300223, Timiș, Romania; National Museum of Banat, Department of Archeology, Martin Luther, no. 4, Timișoara 300054, Romania.
West University of Timișoara, Department of Geography, V. Pârvan, no. 4, Timișoara 300223, Timiș, Romania.
Sci Total Environ. 2017 Dec 1;599-600:1756-1767. doi: 10.1016/j.scitotenv.2017.05.131. Epub 2017 May 19.
The study of sediment production, transport, storage and discharge in alpine drainage basins is an essential prerequisite for a better understanding of the postglacial evolution of the alpine landscape. To get an overview on sediment production and alpine landscape evolution in Romania, the current study presents the first alpine sediment storage quantification in the Romanian Carpathians. Postglacial denudation was quantified within the small alpine catchment of the Doamnei Valley (3.62km), located in the central part of the Făgăraș Mountains. The quantification of sediment volumes was performed through a combined approach consisting of: (i) detailed geomorphological mapping of sediment storage landforms, by means of high accuracy field and remote mapping of sediment storage landforms, (ii) shallow geophysical investigations and (iii) geographic information systems modeling techniques. A total of 64 ground penetrating radar profiles were conducted through the valley for sediment thickness determination of individual landforms. Through parallel profiling, 5 electrical resistivity tomography profiles were also performed for the comparison of bedrock depths in order to determine the overall degree of accuracy of the geophysical investigations applied. In total, 79 sediment storage landforms were identified. Talus sheets were found to be the most dominant landforms within the investigated area, followed by talus cones, moraines and fluvio-torrential deposits. Sediment volume for the Doamnei Valley was calculated to be 7.08±1.42 10m, corresponding to a mean sediment thickness of 4.20m, with the hanging cirques and valleys subsystem storing 48.58% of the total sediment volume, despite covering just 22% of the investigated area. Sediment volume was used in the determination of mean annual denudation rates for the entire catchment (0.20mm/y±0.04mm/y) as well as for mean annual mass transfer (406.2±31.6t/km/y), based on a time span of 13ka.
高山流域泥沙产生、输移、存储和排放的研究是更好地了解高山景观后冰川演化的必要前提。为了全面了解罗马尼亚的泥沙产生和高山景观演化，本研究首次对罗马尼亚喀尔巴阡山脉的高山泥沙存储进行了量化。在多姆纳伊谷（Doamnei Valley）的小高山流域（3.62km）中量化了后冰川剥蚀作用，该流域位于法格拉什山脉（Făgăraș Mountains）的中心。通过综合方法（包括：i）详细的地貌形态测绘、对存储地貌形态的高精度野外和遥感测绘、ii）浅层地球物理调查以及 iii）地理信息系统建模技术）来进行泥沙体积的量化。通过山谷进行了总计 64 条地面穿透雷达剖面，以确定单个地貌的泥沙厚度。通过平行剖面，还进行了 5 条电阻率层析成像剖面，以比较基岩深度，从而确定所应用的地球物理调查的整体精度。总共识别出 79 个泥沙存储地貌。在研究区域内，最主要的地貌类型是崩塌堆积体，其次是崩塌锥、冰碛和河流-洪流沉积物。多姆纳伊山谷的泥沙体积计算为 7.08±1.42×10m，平均泥沙厚度为 4.20m，尽管仅占研究区域的 22%，但悬谷和山谷子系统存储了总泥沙体积的 48.58%。泥沙体积用于确定整个流域的平均年剥蚀率（0.20mm/y±0.04mm/y）以及平均年质量转移（406.2±31.6t/km/y），时间跨度为 13ka。
