TY  - JOUR
AU  - Heaton, T. H. E.
PY  - 1984//
TI  - Sources of the nitrate in phreatic groundwater in the western Kalahari
JO  - Journal of Hydrology
SP  - 249
EP  - 259
VL  - 67
IS  - 1
N2  - Elevated levels of nitrate occur in phreatic groundwater in the western Kalahari, Namibia. Nitrate in water containing 0.4–3.1 meq NO−3l−1, of widespread occurrence, has δ15N values in the range +4.9 to +8.0‰, suggesting natural derivation from the soil. The sporadic occurrence of very high levels of nitrate (> 4 meq NO−3l−1), which has δ15N between +9.3 to +18.7‰, reflects pollution derived from animal waste. The importance of considering the possible isotopic effects of denitrification, and the significance of leaching in the nitrogen budget of the Kalahari soil, are also discussed.
SN  - 0022-1694
UR  - https://www.sciencedirect.com/science/article/pii/0022169484902440
N1  - exported from refbase (http://www.uhydro.de/base/show.php?record=278), last updated on Fri, 02 Feb 2024 12:59:03 +0100
ID  - Heaton1984
ER  -