Remote Sensing and Hydrology 2000 (Proceedings of a symposium held at Santa Fe, New Mexico, USA, April 2000). IAHS Publ. no. 267, 2001, pp. 531535.

Hydrological processes on large flatlands: case study in the northwest region of Buenos Aires Province (Argentina)

EDUARDO KRUSE

Universidad Nacional de La Plata and CONICET, Facultad de Ciencias Astronómicas y Geofísicas, Paseo del Bosque, La Plata 1900, Argentina

e-mail: kruse@fcaglp.edu.ar

JUAN ALBERTO FORTE LAY

CONICET, Avenue Paseo Colón 751, Buenos Aires, Argentina

JOSE LUIS AIELLO

CONAE and Universidad Nacional de La Plata, Avenue Paseo Colón 751, Buenos Aires, Argentina

ADRIANA BASUALDO & GERMAN HEINZENKNECHT

FECEACOP, Avenue Corrientes 119, Buenos Aires, Argentina

Abstract. The main features of the northwest region of Buenos Aires Province (Argentina) are its small topographic slope, the lack of a drainage network and the presence of permeable sediments near the surface. As a consequence, there is no fluvial network and the lagoons or ponds located in the depressions are important. Landsat 5 TM images have shown good contrast between water and land areas. All available scenes between August 1998 and August 1999 were used in a multitemporal analysis. The areas of the lagoons, obtained by satellite images, in each period were compared with hydrological variables measured in situ. The results show a relationship between variations of the water balance (precipitation evapotranspiration) and fluctuations of the water table and lagoon areas.

Key words agricultural system; Buenos Aires Province (Argentina); flatlands;
hydrological processes; image classification; image geo-referencing;lagoon areas; Landsat; water table fluctuations

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