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8341676 
Journal Article 
Application of Hydrus-1D software in groundwater contamination risk assessment 
Li, W; He, JT; Liu, LY; Gao, P; Ji, YP 
2013 
1 
Zhongguo Huanjing Kexue / China Environmental Science
ISSN: 1000-6923 
33 
4 
639-647 
Chinese 
To investigate the groundwater contamination risk assessment method, the reclaimed water irrigation farmland lies in the southeast suburb of Beijing was chosen as study area, and Hydrus-1D software was selected to delineate water flow and solute transport process of the water infiltration vertically in vadose zone while reclaimed water irrigation. Naphthalene and phenanthrene, the typical organic pollutants in reclaimed water were chosen as the target contaminants. The transportation and degradation process of them were simulated under the continuous infiltration pattern. After the simulation, 226 points simulated results of Hydrus-1D were applied to the whole study area to assess groundwater contamination risk, and used MapGIS 6.7 to get the risk map. Through comparing the results to the background value of naphthalene and phenanthrene in the groundwater of study area, the groundwater contamination risk were discussed. The results suggested that the risk of naphthalene and phenanthrene in groundwater of the whole study area was very low even after 50 year's reclaimed water irrigation. The pollution risk of naphthalene to groundwater was higher than phenanthrene. The highest pollution risk regions in the study area were mainly located in Fenggang distributaries, the intersection of Hongqi main channel and Fengguan channel, and the region between Yongle river and Tongda intercepting ditch. 
Groundwater contamination risk assessment; Hydrus-1D software; Polycyclic aromatic hydrocarbons; Reclaimed water