Acta Geodynamica et Geomaterialia

Title: COMPARISON OF SEASONAL HYDROLOGIC VARIATIONS IN THE LA PLATA BASIN FROM GRACE MONTHLY SOLUTIONS WITH IN SITU GAUGE WATER LEVEL DATA
Authors: Kiss Annamária and Foldváry Lóránt
DOI: 10.13168/AGG.2016.0035
Journal: Acta Geodynamica et Geomaterialia, Vol. 14, No. 2 (186), Prague 2017
Full Text: PDF file (1.4 MB)
Keywords: water storage variation, GRACE, tide gauge
Abstract: Seasonal hydrologic variations have been determined in the La Plata basin from GRACE monthly solutions for a time span of less than 6 years. The results have been compared to tide gauge water level data along several rivers of the La Plata basin. Annual and semi-annual curves have been fitted both to the GRACE water storage variation series and to the tide gauge water level series, correlations between the original series and the curves have been determined, relationship of the amplitudes and phases have been investigated. The aim of the comparison is to detect time delay between the seasonal cycle of precipitation (related to GRACE) and runoff (observed by tide gauges). The time delay may deliver information on water storage, such as groundwater aquifers, soil moisture or canopy interception. As for the results, by the comparison of the annual phases, 11-13 days of time delay between GRACE data and tide gauge data has been detected.