Marsh Flood Dynamics from the NDPI Index, Biological Reserve of São Donato – RS

Authors

  • Daniela Zanetti Bittencourt Universidade Federal do Rio Grande do Sul
  • Laurindo Antonio Guasselli Universidade Federal do Rio Grande do Sul

DOI:

https://doi.org/10.11606/rdg.v33i0.125834

Keywords:

Wetland, Humidity Index, Flood Plains, Flood Patterns.

Abstract

The characteristic marshes of the Pampa biome are part of a wide range of wetlands, which are periodically flooded by lateral reflections of rivers and lakes, by direct precipitation or by groundwater. In order to understand the dynamics of these environments - in particular the marsh of the São Donato Biological Reserve - RS, from the Landsat 5 and Landsat 8 images processing, the Normalized Difference Pond Index (NDPI) index and daily and monthly precipitation records of two rain stations were used, one local and the other upstream of the Uruguay River. The results show that there are patterns in the NDPI images from the flood spots. NDPI classes were determined: Very Dry, Dry, Moist and Very Moist. Three flood patterns were defined in the reserve marsh, observed through the NDPI images: the regional one, due to the influence of rains originating from areas north of the marsh, in the upstream stretch; The sub-regional, due to the influence of rainfall in the east, of the hydrographic sub-region of the rivers Butuí and Icamaquã; And a local pattern, influenced by rainfall upstream of the Butuí River, which directly affects the marsh with soaking the soil.

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Author Biographies

  • Daniela Zanetti Bittencourt, Universidade Federal do Rio Grande do Sul
    Cursando mestrado acadêmico em Geografia: Análise Ambiental, no Programa de Pós-Graduação em Geografia, do Instituto de Geociências, UFRGS.
  • Laurindo Antonio Guasselli, Universidade Federal do Rio Grande do Sul

    Professor do Departamento de Geografia do Instituto de Geociências, UFRGS.

    Coordenador do Programa de Pós-Graduação em Sensoriamento Remoto.

Published

2017-08-23

Issue

Section

Artigos

How to Cite

Bittencourt, D. Z., & Guasselli, L. A. (2017). Marsh Flood Dynamics from the NDPI Index, Biological Reserve of São Donato – RS. Revista Do Departamento De Geografia, 33, 85-96. https://doi.org/10.11606/rdg.v33i0.125834