A study of seasonal trends in precipitation patterns during a period of forty years for sustainable agricultural water management in Buenos Aires Province, Argentina

Abstract

An analysis of semestral precipitation for the sixteen drainage areas of Buenos Airesprovince (Argentina) was performed. Precipitation daily data, for the period 1971-2010, were provided by the National Meteorological Service and the NationalAgronomic Technology. The test Mann-Kendall was applied and an Excel template(Makesens) was used for detecting and estimate trends. There were found significantstatistical results for cold semester in some sectors: Northwestern area of the SaladoRiver basin, Central area of the Salado River basin, Salado River mouth, Southernarea of the Salado River basin and northern area of Vallimanca River basin, Southernarea of the Salado and Vallimanca Rivers basins and Arrecifes River basin, WesternChannels area at south of the Salado River basin, Region without surface drainageand Lagoon area at the Southwest, Small rivers and streams with Atlantic drainageand Basins and Streams of South (to west) for different periods and mostlydecreasing. The sectors Southern area of the Salado and Vallimanca Rivers basinsand Lagoon area at the Southwest were the only two with significant statistical resultsfor the warm semester.