Hydrochemical and stable isotopes indicators for detecting sources of groundwater contamination close to Bahr El-Baqar drain, eastern Nile Delta, Egypt

Stable isotopes and multiple sources

Introduction Conclusions References

Stable chromium isotopes as indicators of reduction and immobilization of hexavalent chromium in groundwater

Evaluation of nitrogen isotopes as indicators of nitrate contamination sources in an agricultural watershed

Determining the relative contributions of nitrate contamination in agricultural watersheds characterized by applications of both mineral and animal waste nitrogen to fields is important in evaluating the environmental consequences of these practices. Here, the use of nitrate–nitrogen (NO3−–N) stable isotopes to identify contaminant sources was examined in surface waters of an agricultural water...

Assessing the vulnerability of groundwater sources to fecal contamination

The Honolulu Board of Water Supply (HBWS) selectively chlorinates half of its groundwater supply to provide drinking water that meets the Total Coliform Rule. The objective of this study was to determine whether the groundwater sources used by HBWS are vulnerable to contamination with fecal matter and would require routine disinfection. Larger volumes (1,000 mL) of samples from groundwater and ...

Isotope hydrology of southern Nevada groundwater: Stable isotopes and radiocarbon

A new !O map of southern Nevada groundwater shows a systematic decrease in !O of !5‰ from 36" to 39"N latitude. The variation is consistent with higher-latitude recharge following continuous flow paths along north-south trending graben valleys and systematically increasing in !O due to mixing with lower-latitude, higher-!O recharge. The data do not suggest that large masses of groundwater with ...