Detecting Offsets in Annual Precipitations Time Series Case: East of Algeria

Observations exploited in Meteorology and climatology as precipitations are affected by heterogeneities that are due to the change of equipment (GNSS antenna, rain gauge), treatment methodology, failure related to satellites, climatic natural effect ... etc.The main objective of this study is to apply some statistical methods that make it possible to detect breaks within the series of observations (Pettitt and SNHT test (Standard Normal Homogeneity test) ...). and adjust the time series. The time series of precipitation collected through this study were processed by different statistical methods and the obtained results are satisfying in the context of correlation between different methods, nevertheless, it would be desirable to use other longer datasets with more robust methods