The importance of the soil degradation in the Mediterranean area, more particularly in Algeria, has revealed the need for a diagnosis of the erosion processes’ dynamism. In this context, the present work discusses the results obtained by different approaches (conventional methods, Revised Universal Soil Loss Equation (RUSLE), and fallout radionuclides (use of FRNs)). The use of nuclear techniques (FRNs) such as Cesium-137, Lead-210, and Beryllium-7 as tracers can provide an invaluable amount of information on rates of soil loss that is associated with sheet and rill erosion as well as on the redistribution and transfer of that sediment within the landscape. This work mainly presents the results obtained by the application of nuclear isotopes. In the Fergoug watershed study, the use of conventional and nuclear methods has led to converging results. The latter can be summarized as follows: sheet erosion from 1.5 to 10 t·ha⁻¹·year⁻¹ for bare soil and 0.1 to 4 t·ha⁻¹·year⁻¹ for cultivated soil. The use of the RUSLE method has shown that erosion is medium to very high (1 to 33 t·ha⁻¹·year⁻¹). Estimates of erosion by Cesium-137 (¹³⁷Cs) provided a good understanding of the distribution of the isotope at the slope level and therefore of erosion. The erosion rate is from 26 to 42 t·ha^-1·year^-1, depending on the models used. On the other hand, sedimentation reached 35 and 55 t·ha^-1·year^-1 downstream of the slopes. The variation of ¹³⁷Cs between transects and along the same transect is linked to erosion. The ¹³⁷Cs method has provided a great deal of information and thus constitutes, by its accuracy and speed, an effective and valuable tool for assessing erosion for medium term (50 years) and monitoring the impacts of land use. It can enable one to overcome the various constraints and limits encountered in the various conventional approaches. It thus appears to be an essential alternative or an effective tool to supplement the conventional methods.

在地中海地区，尤其是在阿尔及利亚，土壤退化的重要性表明，需要诊断侵蚀过程的动力。在这种情况下，本工作讨论了通过不同方法（常规方法，修订的通用土壤流失方程（RUSLE）和放射性核素（使用FRN））获得的结果。使用诸如铯137，铅210和铍7之类的核技术（FRN）作为示踪剂，可以提供有关土壤流失速率的宝贵信息，这些损失与表土和小溪侵蚀以及重新分配有关和沉积物在景观中的转移。这项工作主要介绍了通过应用核同位素获得的结果。在Fergoug分水岭的研究中，常规方法和核方法的使用产生了收敛的结果。^-1 ·年^-1为裸露的土壤和0.1〜4 T·公顷^-1 ·年^-1为耕地土壤。RUSLE方法的使用表明侵蚀程度中等至很高（1至33 t·ha ^-1 ·year ^-1）。对铯137（¹³⁷ Cs）腐蚀的估计提供了对斜坡水平同位素分布以及腐蚀的良好理解。侵蚀速率从26到42 t·ha ^-1 ·year ^-1，具体取决于所使用的模型。另一方面，沉积物在斜坡下游达到了35和55 t·ha ^-1 ·year ^-1。¹³⁷的变化横断面之间和沿同一横断面的Cs与侵蚀有关。在¹³⁷铯方法已经提供了大量信息，从而构成，其精度和速度，以评估对侵蚀中期（50岁）和监测土地使用的影响的有效和有价值的工具。它可以使人们克服各种常规方法中遇到的各种限制和限制。因此，它似乎是补充传统方法的必要替代方法或有效工具。