The description and analysis of rainfall trends is necessary for effective planning, management, and exploitation of water resources. This study investigates the possible trend of precipitation of 28 stations in a semi-arid Mediterranean environment (Northern Algeria) for the period from 1959 to 2019 (60 years), using a recently proposed innovative partial trend methodology. The main advantage of this new method is that it provides qualitative interpretations of trends in the high, medium, and low precipitation ranges in terms of the structure of the time series’ internal trend. An accurate database has been established thanks to the homogeneity of the data quality leading to rather satisfactory results with a precision of the spatial and temporal tendencies, thus establishing maps of regional trends: “high precipitation,” “average precipitation,” and “low precipitation” for the whole study area.

为了有效地规划，管理和开发水资源，必须对降雨趋势进行描述和分析。这项研究使用最近提出的创新性局部趋势方法，研究了1959年至2019年（60年）期间在半干旱地中海环境（阿尔及利亚北部）中28个台站的可能降水趋势。这种新方法的主要优点是，它可以根据时间序列内部趋势的结构对高，中和低降水范围内的趋势进行定性解释。由于数据质量的同质性，建立了一个准确的数据库，从而获得了令人满意的结果，并具有精确的时空趋势，从而建立了区域趋势图：“高降水量”，“平均降水量，