Insights from multiple, high-resolution borehole methods to assess groundwater vertical flow pathways in a weathered soil-crystalline rock system in Sao Paulo, Brazil

A comprehensive dataset of environmentally contaminated sites in the state of São Paulo in Brazil

“…For a more localized analysis, we are taking the example of the Jurubatuba neighbourhood which is within an industrialised district. Hydrogeological and contaminant data on this neighbourhood is discussed in the literature 38 – 42 . Figure 12b shows the distribution of the reported sites in the dataset in Jurubatuba in the year 2020.…”

Temporal conceptual models for contaminated complex site management, based on a remediation case of chlorinated solvent commingled plumes in weathered and fractured bedrock

“…heterogeneous fracture distribution and discontinuity; flow and contaminant behaviour in fracture networks; interactions with rock matrices; high financial demands. Specific contamination challenges were also reported at fractured rock aquifers within tropical humid regions (Hart et al, 2007;Fanti et al, 2017;Bertolo 2017;Lima 2018, Sartorio 2019Pino, 2019, Pino et al, 2022, such as extensively weathered heterogeneous rock profiles (Figure 2). Despite the increasing demand for fractured bedrock groundwater and concerns about contaminated sites under tropical humid conditions, the amount of published studies about such complex scenarios is still relatively scarce.…”

“…It typically presents very good natural quality and a certain degree of protection from anthropogenic contaminants provided by shallower units (soils enriched with organic matter, sediments and weathered rock) that retards flow and enhances degradation processes (Bertolo 2017). Comprehensive analytical monitoring data of these supply wells is limited, however contaminants, such as dense chlorinated solvents compounds, have been identified in several crystalline fractured bedrock wells of MRSP (Hart et al 2007;L´Apiccirela 2009;Fiume, 2014;Bertolo 2017;Lima 2018;Barbosa 2019;Pino 2019;Pino et al, 2022). Many impacted supply wells potentially exist in MRSP, such as in the several former industrial areas, and pose a large challenge from a scientific and management perspective.…”