137Cs应用于我国土壤侵蚀研究评述

^137Cs示踪法技术目前已被广泛应用于长期的土壤侵蚀估算中，但主要局限于水蚀研究领域，在风蚀方面进行的研究则较少。土壤风蚀是导致干旱半干旱地区土地退化和区域环境恶化的最重要原因之一。探讨、研究格进一步完善^137Cs技术在土壤侵蚀方面的研究，尤其是在我国西部风蚀地区土壤侵蚀中的应用，可以提供独立的土壤侵蚀和堆积的数据以及空间分布，对初步测算区域风蚀速率、风蚀时间序列和反映环境变化，为我国西部地区土地资源合理利用、环境整治以及生态建设提供定量的科学依据具有十分重要的意义。初步论述了^137Cs技术在我国土壤侵蚀研究中的进展，探讨了其在西部风蚀地区土壤风蚀研究现状、应用前景和需要注意的问题，并提出了一些建议。

A Review on the 137Cs Applications in the Soil Erosion Study in China

Wind erosion is one of the most important reasons for land degradation and regional environment deterioration in the arid and semiarid areas. The 137Cs tracer technique is being widely used in the estimation of soil erosion representing a long term, but mainly limited in the field of water-induced soil erosion study, and there has been very few research on soil wind erosion. China has wind eroded area of 1 300 thousands km2, accounting for 13.54% of her total area. Studying and perfecting the I37Cs tracing technique used in the research on soil erosion of the western wind eroded region can provide independent data of soil erosion and sedimentation and spatial distribution pattern. The technique is important to initially computing the average soil loss rates and the time series of regional wind erosion and then reflecting the environment changes. It has big significances in providing quantitative and scientific basis for land resource reasonable utilization, environment restoring, and eco-construction in the western part of China. The paper reviewed the progresses in application of Cs technique to estimating soil erosion, and the primary existing quantitative models, and their limitations were also revealed.The needs of some further improvements of existing models and some additional intensive works especially in the western arid and semiarid areas of China were also suggested.