MATHEMATICAL MODELING OF NITRATE NITROGEN RUNOFF PROCESS FROM A FORESTED MOUNTAIN BASIN INCORPORATED WITH NITRIFICATION

• TAMURA Takao

  高松工業高等専門学校建設環境工学科

• YOSHIDA Hiromu

  徳島大学工学部建設工学科

• HASHINO Michio

  徳島大学工学部建設工学科

Bibliographic Information

Other Title

• 硝化を考慮した森林土壌からの硝酸態窒素流出過程の数理モデル化に関する基礎的検討

Abstract

A mathematical model of NO_3^--N runoff process from a forested mountain basin is developed, based on a tank model comprising a surface tank with soilwater storage systems, and a groundwater tank. The model takes account of three elementary processes of NO_3^--N in the forested mountain soil, (a) advection owing to the rainwater movement, (b) solute exchange between mobile and immobile regions, and (c) nitrification by microorganisms in the soil. The nitrification process is modeled using an exponential function of air temperature.<BR>The proposed model is applied to annual observations in 1992 obtained in Shirakawa-tani forested mountain basin (main species Japanese cedar) located on Shikoku island in Japan. The model describes the seasonal change of NO_3^--N streamwater concentration through a year. But, it is found that the model has underestimates objects at the beginning of summer. The deviation may be caused by not using soil temperature, but using air temperature data.

Journal

• PROCEEDINGS OF HYDRAULIC ENGINEERING

  PROCEEDINGS OF HYDRAULIC ENGINEERING 42 229-234, 1998

  Japan Society of Civil Engineers

Keywords

• NO<SUB>3<SUP>-</SUP></SUB>-N
• runoff process
• forested mountain basin
• nitrification
• temperature
• streamwater concentration
• mathematical model

Details

• CRID: 1390001205171133184
• NII Article ID: 10002172652
• NII Book ID: AA1045915X
• DOI: 10.2208/prohe.42.229
• ISSN: 18849172
• ISSN: 09167374
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed