Avaliação das alterações da rede de drenagem em sub-bacias e microbacias do alto e baixo rio Capivari (Louveira e Rafard/SP) / Evaluation of drainage network alterations in the high and low Capivari river microbasins and sub-basins (Louveira and Rafard/SP)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

This work was proposed to evaluation the drainage networks time changes in the crystallines and sedimentaries hydrographic microbasins and sub basins, situated in the high and low Capivari river (Louveira and Rafard/SP). The methodological approach has consisted in the analysis of the morphometry, identification of physical environmental element and human activities. The components were identified, for aerial photo, scale 1:25.000, between 1972 and 1995, and were associated field activities and laboratories tests. The results were showed first-order channel number and length were the morphometric variables which most contributed to the drainage systems changes with direct influence in the index drainage density and hydrographic density. These alterations in the area of Capivari high river sub-basins and microbasins were associated with the human activies installations or the changes. These changes in the area of Capivari low river were associated with geology and sugar-cane raising. Also, the following cartographic documents were elaborated for two studies areas: documentation map, geological map, declivities chart, unconsolidated materials map and landforms map. The drainage network map and the land use map were created for two analysis times, 1972 and 1995.

ASSUNTO(S)

morfometria watershed microbacias capivari rede de drenagem capivari photo aerial drainage network morphometry fotografias aéreas

ACESSO AO ARTIGO

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