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核素示踪技术研究作为一种新的土壤侵蚀研究方法,在土壤侵蚀的沉积、侵蚀、运移研究上得到很好的应用。采用放射性核素作为土壤示踪剂,可以很好的进行流域尺度的范围研究,且可靠性比较高,省时省力。本文选择江淮分水岭具有代表性的明光市鲁山乡鸡心岗水库两侧山坡上20世纪60年代以来基本未受人类活动干扰的、覆盖有灌丛植被的坡地(坡度16°)为研究剖面,取土样进行137Cs分析,测算出当地土壤侵蚀模数为4521.5t/(km·2a),与遥感法和公式法算出的结果基本一致。
As a new method of soil erosion research, the study of radionuclide tracer technology is well applied in the research of sedimentation, erosion and migration of soil erosion. The use of radionuclides as soil tracers can be a good study of the scale of the basin, and the reliability is relatively high, saving time and effort. In this paper, the hillsides on both sides of Jixingang Reservoir in Lushan Township, Mingguang City, which is representative of the Jianghuai watershed, are slopes (16 ° slope) which are not disturbed by human activities and have been covered by shrub vegetation since the 1960s. Soil samples were analyzed by 137Cs, and the local soil erosion modulus was calculated to be 4521.5t / (km · 2a), which was basically consistent with the results obtained by remote sensing and formula method.