Analysis of NO3-N pollution with a distributed groundwater quality model

Hiroaki Somura, Akira Goto, Hiroyuki Matsui, Elhassan Ali Musa, Masakazu Mizutani

Research output: Contribution to journalArticlepeer-review


Nitrate-nitrogen (NO3-N) was selected as a groundwater resource sustainability indicator because it is well known as a cause of some diseases and the concentration in groundwater has increased gradually in recent years. We monitored it continuously from August 1996 to December 2001 in the Nasunogahara basin, Tochigi Prefecture, Japan, and constructed a distributed groundwater quality model in this basin. The model consists of two processes: infiltration of the NO3-N load into groundwater, and advection of the NO3-N load in the groundwater. As a result, the large changes of nitrogen load in the surface layer before/after heavy rainfall and the concentration changes in the groundwater by advection were well expressed. In addition, the effects of the nitrogen load infiltration from many livestock farms in the upper basin to groundwater in the lower basin were investigated.

Original languageEnglish
Pages (from-to)158-171
Number of pages14
JournalIAHS-AISH Publication
Issue number302
Publication statusPublished - Sept 18 2006
Externally publishedYes


  • Alluvial fan
  • Livestock farming
  • Shallow aquifer
  • Sound utilization of groundwater

ASJC Scopus subject areas

  • Water Science and Technology
  • Oceanography


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