Se analizan las modificaciones en las posibilidades de recarga del acuífero costero en el Partido de La Costa (Buenos Aires, Argentina) según las cambios en el uso del suelo entre 1973 y 2010. Se realizó un análisis multitemporal sobre imágenes satelitales Landsat diferenciando cuatro clases de uso del suelo. Se estimaron los balances hídricos y en función de los valores de infiltración y se evaluó la recarga para cada situación. Se reconoce un incremento importante de las áreas urbanizadas en casi cuatro décadas. En 1973 es difícil distinguir estructuras arquitectónicas mientras que en 2010 claramente se reconoce el desarrollo de ejidos urbanos asociados a la fijación de los médanos. Este desarrollo está acompañado por un importante crecimiento poblacional y aumento en la demanda de agua. El incremento de las superficies impermeables ha modificado las condiciones de la recarga y el volumen de las reservas de agua dulce disponibles.
The modifications in the capabilities of the coastal aquifer recharge were analyzed for the Partido de La Costa (Buenos Aires, Argentina) according to the land-use change occurred over the last four decades. A multitemporal analysis of Landsat images (1973-2010) allowed recognizing four land-use classes. Their comparison pointed out an important development of urbanized areas at the expense of natural field dunes. In 1973 only few scattered architectonic structures were present while in 2010 an important development of urban areas associated with dunes fixation is noticed. The hydrologic budgets were calculated and, according to the values of infiltration, the recharge was evaluated for each situation. An important growth of population associated to the urban development has increased the water needs and consequently the groundwater demand. The expansion of impermeable areas has modified recharge conditions and the volume of available freshwater.
Análisis temporal de las modificaciones en los médanos del Partido de la Costa y su relación con los recursos hídricos
Braga F;Tosi L
2013
Abstract
The modifications in the capabilities of the coastal aquifer recharge were analyzed for the Partido de La Costa (Buenos Aires, Argentina) according to the land-use change occurred over the last four decades. A multitemporal analysis of Landsat images (1973-2010) allowed recognizing four land-use classes. Their comparison pointed out an important development of urbanized areas at the expense of natural field dunes. In 1973 only few scattered architectonic structures were present while in 2010 an important development of urban areas associated with dunes fixation is noticed. The hydrologic budgets were calculated and, according to the values of infiltration, the recharge was evaluated for each situation. An important growth of population associated to the urban development has increased the water needs and consequently the groundwater demand. The expansion of impermeable areas has modified recharge conditions and the volume of available freshwater.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.