O papel dos remanescentes florestais na manutenção da qualidade da água em microbacias agrícolas

Multi-scale assessment of forest cover in an agricultural landscape of Southeastern Brazil: Implications for management and conservation of stream habitat and water quality

“…Moreover, sugarcane burning, heavy machinery, soil exposure, and agricultural use of limestone for soil pH correction (common practices in sugarcane plantations in Brazil) are sources of ions and sediments carried to the channel by runoff (Allan and Castillo, 2007;Silva et al, 2007). Some studies have found higher nitrate concentrations in some sugarcane catchments even though they have a high percent of forest cover in the drainage network (Cassiano, 2013;Mori et al, 2015;Taniwaki et al, 2016). Apparently, poor forest conservation in the landscape and poor land use management in the catchment have contributed to these results, as observed by Taniwaki et al (2016), who found higher conductivity, nitrate and dissolved organic carbon in a sugarcane catchment with deforested springheads compared to one with preserved springheads.…”

Quality assessment of water corpuses front the anthropic actions in the municipality of Santa Lucia - SP

“…Em conformidade com a análise da dinâmica de uso e ocupação do solo do município, destaca-se que os impactos gerados pelo uso excessivo de fertilizantes, corretores do solo pesticidas é um dos principais problemas no plantio da cana de açúcar, isso porque os materiais adicionados ao plantio são carreados para os corpos hídricos próximos (ou infiltram para o lençol freático) através do escoamento superficial e representam um acréscimo de materiais particulados em suspensão, amônios e nitratos (Cassiano, 2013).…”

“…A presença da vegetação ciliar é essencial para a manutenção dos corpos hídricos, funcionando como zona tampão de nutrientes e sedimentos, controle da incidência solar e estabilização das margens (Cassiano, 2013).…”

Carbon sequestration potential of the soil in the restoration of riparian forests of the Corumbataí basin (SP)

“…The high economic growth brought by the agribusiness and its cycles to the State of São Paulo, and more specifically to the Corumbataí basin, was coupled with the devastation of the original vegetation of the region (Del Grande et al, 2003). Nowadays, the remnant forests are restricted to degraded and small fragments isolated in steep-slope terrain and on the margin of waterbodies (Valente, 2005), what in most of the cases, prevent them from providing enough ecosystem services (Cassiano, 2013). However, Cassiano (2013) identified an increment in the forested area of the Corumbataí basin in the last years, and emphasizes that more studies are needed to determine whether the regeneration rates are going to stabilize or increase.…”