The content of ammonia-nitrite-nitrates is distributed uniformly and increases continuously over the years in porous unconfined water in Jilin city on the basis of the analysis of hydrogeochemical data.Different pollution sources, pollution of surface water, hydrogeologic condition, and water and soil loss have some influences on the transportation, transformation and distribution of ammonia-nitrite-nitrates. The soil layer over aquifer has some purification function for ammonia-nitrite-nitrates from indoor simulation tests.
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