Efeitos do manejo de florestas plantadas de <i>Eucalyptus</i> sobre os recursos hídricos superficiais na escala de microbacias hidrográficas

Abstract

Relações entre precipitação, deflúvio e evapotranspiração em florestas plantadas de Eucalyptus e em diferentes tipos de vegetação nativa .

Water Related Ecosystem Services in Brazilian savannas, in landscapes of natural vegetation and eucalyptus plantations

“…Parameters that presented the best relation to natural forest percentage (Turb, TSS, pH, EC and TDS) and also presented higher coefficient of variation in the lower percentages of natural forest coverage (Turb, EC e TDS), are related to the erosion of dissolved particles (EC, TDS, pH), and bigger particles as well (Turb, TSS), which indicates soil loss impacts. These results are fair to the reality of eucalyptus plantations, once soil loss is often pointed as a frequent impact over water resources (Lima et al 1996, FERRAZ et al, 2007, MOSCA, 2008, Foelkel 2005, CASSIANO, 2017, RODRIGUES, 2017. Crucial events in this regard are the clear cut, due to trucks and heavy machinery transit; the first years after planting or after coppice, once the canopy formation is strictly necessary to soil protection; and the presence of dirt roads to the transport of logs, pointed by several authors as important sediment sources (GARCIA et al, 2003, FERRAZ et al, 2007MARTINS FILHO, 2014;PRADO, 2015;RODRIGUES, 2017).…”

“…These results are fair to the reality of eucalyptus plantations, once soil loss is often pointed as a frequent impact over water resources (Lima et al 1996, FERRAZ et al, 2007, MOSCA, 2008, Foelkel 2005, CASSIANO, 2017, RODRIGUES, 2017. Crucial events in this regard are the clear cut, due to trucks and heavy machinery transit; the first years after planting or after coppice, once the canopy formation is strictly necessary to soil protection; and the presence of dirt roads to the transport of logs, pointed by several authors as important sediment sources (GARCIA et al, 2003, FERRAZ et al, 2007MARTINS FILHO, 2014;PRADO, 2015;RODRIGUES, 2017). Its effect can be worsened depending on the positioning of the roads across the watershed relief, and also during the construction of new roads (FERRAZ et al, 2007).…”

“…The intensive management increases concerns over water quality impacts (RODRIGUES, 2017) and ESw supply (HACKBART, 2016).…”