SciELO - Scientific Electronic Library Online

 
vol.20 número1Vulnerabilidad ambiental en cuencas hidrográficas serranas mediante SIGEl manejo indígena del agua en San Juan (Argentina): diseño y funcionamiento del sistema de canales de Zonda índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Articulo

Indicadores

  • No hay articulos citadosCitado por SciELO

Links relacionados

  • En proceso de indezaciónCitado por Google
  • No hay articulos similaresSimilares en SciELO
  • En proceso de indezaciónSimilares en Google

Bookmark


Multequina

versión On-line ISSN 1852-7329

Resumen

PASTRAN, Graciela et al. Aeolian and hydric dynamic in the Medanos Grandes system, SE San Juan, Argentina. Multequina [online]. 2011, vol.20, n.1, pp. 15-26. ISSN 1852-7329.

In psammophilous systems the most important ecological factors are the sand movement and water disponibility. In this paper is described the aeolian and hydrical dinamism in crests and inter sand-dunes in the Medanos Grandes system (San Juan), analyzing the aeolian sand movement, volumes of sand removal by hydric erosion registered in erosion registered in canvas and by topographic and geophysic studies determining the soil profile of humidity. In crests domain aeolian processes, without nebkhas formation and with differences in sand movement according to plant cover. For the studied period, in crests with plant cover less than 5% sand movement was -0,361 m3/m (agradation), while -0,017 m3/m when plant cover was up to 35%. These environments showed resistivities between 5000 and 6000 O.m, belonging to less 0.6 g water/100 g sand, in the first meters of depth. In inter sand-dunes variations in both net depositation and aeolian erosion, for the studied period, was 0.032 m3/m, while the water (hydric) mean erosion rate was 0.184 m3/year. On the other hand, resistivity values between 500 and 700 O.m were detected to 5 m deep, belonging to a wet bulb (isolated capillary water) with values 1.21 to 2 g water/100 g sand.

Palabras llave : Erosion; Wet bulb; Isolated capillary water; Psammophilous system.

        · resumen en Español     · texto en Español     · pdf en Español