The current study focuses on the issue of the decrease in sediment discharge to the Mediterranean Sea by the largest river in Algeria, the Wadi Cheliff (i.e. Cheliff River). This study clarifies the effect of climatic and anthropogenic factors on the changes in the sedimentary dynamics of the Cheliff River discharging to the sea. The data used (rainfall, water discharge, and sediment discharge) concern the Sidi Bel Attar gaging station on the Cheliff River, only 18 km from discharge to the Mediterranean Sea. A power-type statistical regression model was used to fill the 74.2% gap in Suspended Solids (SS) measurements in the establishment of a SS database for the period 1951–2012. The study results show that the transport of suspended sediment discharged to the sea is about 487 t/km²/yr. Statistical tests of breaks highlight that rainfall decreased by 26% and that water and sediment input to the sea declined from 74% to 63% for the period of 1981–2012. The correlation analysis shows a decrease in the contribution of rainfall on sediment and water input at the outlet equal to 77.9% and 77.8%, respectively, during the period of 1980–2012, compared to the period of 1968–1980. However, the double mass method reflects the contribution of factors other than rainfall to the decrease of sediment input to the sea. These other factors mainly include large dams, which intercepted about 71% of the total volume of sediment discharged to the sea during the period of 1968–2010. In addition the contribution of large dams to the reduction of sedimentary input to the sea is more important than that of the decrease in rainfall. The management of large dams also contributes to the increase in the sediment deficit to the sea through the prioritization of interception of sediment at the expense of releases, for socio-economic purposes, 68.4% of the Cheliff River discharge is diverted for human use. This has led to an increase in the mean water bed level at bankfull downstream, where the Cheliff River gave up 51% of its width to the floodplain between 1996 and 2009. In the light of the scarcity of sediment transport data in North Africa and in many other areas, the current study provides a reference framework for other studies: providing useful information for the study of the transfer of sediment from land to sea, and the links with the socio-economic needs.

目前的研究集中在阿尔及利亚最大的河流瓦迪切尔里夫河（即切尔里夫河）向地中海排放的沉积物减少的问题上。这项研究澄清了气候和人为因素对切尔夫河入海沉积动力学变化的影响。所使用的数据（降雨，排水和泥沙排放）与切尔夫河上的Sidi Bel Attar测量站有关，距离排放站到地中海仅18公里。在建立1951-2012年SS数据库的过程中，使用了幂类型统计回归模型来填补悬浮固体（SS）测量中74.2％的缺口。研究结果表明，排入海洋的悬浮泥沙的输送量约为487 t / km ^2。/年。断裂的统计测试结果表明，在1981年至2012年期间，降雨减少了26％，入海的水和沉积物从74％下降至63％。相关分析表明，与1968-1980年相比，1980-2012年期间降雨对出口沉积物和水输入的贡献分别减少了77.9％和77.8％。但是，双质量法反映了降雨以外的因素对减少输入海洋的沉积物的贡献。这些其他因素主要包括大型水坝，在1968年至2010年期间，该水坝拦截了排入海洋的沉积物总量的约71％。此外，大型水坝对减少海洋沉积物的贡献比减少降雨更重要。大型水坝的管理还通过优先考虑截留沉积物（以释放为代价），增加了海洋中的沉积物赤字，这是出于社会经济目的，切尔夫河河流量的68.4％被改作人类使用。这导致下游河岸的平均水床水位增加，在1996年至2009年之间，切尔夫河（Cheliff River）将其宽度的51％放弃了泛滥平原。在许多其他领域，本研究为其他研究提供了参考框架：为研究沉积物从陆地到海洋的转移以及与社会经济需求的联系提供了有用的信息。