%0 Journal Article
%A WANG Jin-guo
%A LI Qun
%A WANG Bi-ying
%A ZHANG Ying
%T Characteristics of Nitrogen Pollution and Isotopic Tracer Analysis ofShallow Groundwater in the Sewage Irrigation Area of Kuihe River
%D 2017
%R 10.11988/ckyyb.20160120
%J Journal of Yangtze River Scientific Research Institute
%P 15-19
%V 34
%N 4
%X Nitrogen pollution in groundwater is mainly caused by the intrusion of ammonium nitrogen and nitrate nitrogen. Especially when ammonium (NH<sub>4</sub><sup>+</sup>) is the major pollutant in groundwater, studying its distribution characteristics will be difficult as  its migration law in aquifers is complicated and the pollutant is hard to be removed. Through boring holes at both  banks of Kuihe River in Xuzhou city, we collected water samples to analyze nitrogen pollution. Test results showed that the main existence form of nitrogen in the study area was NH<sub>4</sub><sup>+</sup>, followed by NO<sub>3</sub><sup>-</sup>. Isotopic analysis of δ<sup>15</sup>N-NH<sub>4</sub><sup>+</sup> showed that 27.3% of NH<sub>4</sub><sup>+</sup> in the groundwater was from chemical fertilizer and the rest was from the sources with high δ<sup>15</sup>N, such as animal manure and domestic sewage, etc. On the other hand, isotopic analysis of δ<sup>15</sup>N-NO<sub>3</sub><sup>-</sup>  showed that 15.2% of NO<sub>3</sub><sup>-</sup> was from chemical fertilizer and soil organic nitrogen and 63.6% of that was from animal manure and sewage. Test and analysis of groundwater also showed that about 21.2% of samples were with higher isotope values than the pollution source, reflecting the denitrification in shallow groundwater at the study area.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20160120