论文部分内容阅读
如何定量评价流域不同景观位置的植被覆盖和土地利用对土壤侵蚀产沙的影响,是当代土壤侵蚀研究领域的热点问题之一,也是中国严重水土流失地区可持续性农业发展研究中迫切需要解决的技术难题。作为国际原子能机构资助的土壤侵蚀和产沙评价综合研究项目的一部分——泥沙评价研究,其主要科学目标是利用~(137)Cs和~(210)pb技术确定黄土高原坝库流域泥沙的主要来源和不同景观位置对流域产沙的贡献。该文概括介绍了研究地点的选择依据、采样路线和对黄土高原羊圈沟坝库流域~(137)Cs和~(210)Pb含量的空间分布、泥沙的可能来源及其对流域产沙的相对贡献研究的初步结果。
How to quantitatively assess the impact of vegetation cover and land use on soil erosion and sediment yield in different landscape locations in the basin is one of the hot issues in the field of contemporary soil erosion research and an urgent need to be solved in the research of sustainable agriculture in the serious soil erosion areas in China technical challenge. As a part of the IAEA-funded integrated assessment of soil erosion and sediment yield-sediment evaluation research, its main scientific goal is to determine the sediment of the dam banks of the Loess Plateau by using 137 Cs and 210 Pb technologies The main sources and the contribution of different landscape locations to sediment production in the basin. This paper gives an overview of the selection criteria, sampling routes and the spatial distribution of ~ (137) Cs and ~ (210) Pb contents in the Yancanggou Reservoir watershed on the Loess Plateau. The possible sources of sediment and its effects on sediment yield The preliminary results of the relative contribution of the study.