Robert M. Delinom

TL;DR: The 210 Pb geochronology, heavy metal concentrations (Zn, Cu, and Pb), and stable Pb isotope ratios ( 206 Pb/ 207 Pb) of three sediment cores collected from Jakarta Bay were analyzed to decipher the history of heavy metal contamination in the period 1900-2006.

TL;DR: Investigation of the water systems of Southeast Asian cities of Metro Manila, Bangkok, and Jakarta showed that NO(3)(-) and NH(4)(+) contamination of the aquifers in these developing cities was not excessive, suggesting low risk of drinking groundwater to human health, at present.

TL;DR: The Cl(-) concentration and delta(18)O distributions in groundwater suggest that the decline in hydraulic potential has caused the intrusion of seawater and shallow groundwater into deep groundwater, and it is important to recognize the possibility of future contaminant transport with the discharge of deep groundwater into the sea after the recovery of groundwater potential in the coastal areas.

TL;DR: The results showed that NO3- and NH4+ contamination of the aquifers in Metro Manila, Bangkok, and Jakarta was not excessive, suggesting low risk of drinking groundwater to human health, at present, however, the increased nitrogen load and increased per capita gross domestic product (GDP) in these developing cities may increase this contamination in the very near future.

TL;DR: The results indicate strong evidence for human activities have influenced the degradation of the Jakarta subsurface environment.