Groundwater Quality in Collective Tea Fields and Estimation of Nitrogen and Phosphorus Outflow

• YAMAMOTO Tomihisa

  Department of Agricultural Science, Shuchi High School

• NAKASONE Hideo

  School of Agriculture, Ibaraki University.

• MATSUSAWA Yasuhiro

  School of Agriculture, Ibaraki University.

• KURODA Hisao

  School of Agriculture, Ibaraki University.

• KATOU Tasuku

  School of Agriculture, Ibaraki University.

Bibliographic Information

Other Title

• 集団茶園地帯における地下水水質と窒素・リン流出負荷量の推定
• シュウダン サエン チタイ ニ オケル チカスイ スイシツ ト チッソ リン リュウシュツ フカリョウ ノ スイテイ

Abstract

The study area was located in the Makinohara collective tea fields in Shizuoka, Japan. There are flourishing tea industries in this area. The quality and level of the groundwater were observed from Jun. 2002 to Sept. 2003 and examined on the basis of hydrogeology. The Makinohara plateau comprises of clay layers between gravel beds. It yielded discontinuous water qualities caused by perched water in a geological structure. The average concentrations of T-N and NO₃-N in the surface water were 26.4 mg·l^-1, 23.8mg·l^-1, respectively. In contrast, for the groundwater, these concentrations were 17.2 mg·l^-1 and 12.6 mg·l^-1, respectively. The average concentrations of T-P were 0.012 mg·l^-1 in the surface water and 0.022 mg·l^-1 in the groundwater. This difference is caused by the dilution effect and release of phosphorus from on aquifer. The annual groundwater effluent loads of nitrogen and phosphorus from the catchments of the Makinohara plateau were 406 t·y^-1 and 0.7 t·y^-1, respectively.

Journal

• Journal of Japan Society on Water Environment

  Journal of Japan Society on Water Environment 28 (6), 399-404, 2005

  Japan Society on Water Environment

Keywords

• collective tea fields
• groundwater quality
• nitrogen and T-P concentrations
• dilution effect and release of phosphorus
• groundwater effluent loads

Details

• CRID: 1390001205081542528
• NII Article ID: 10016147256
• NII Book ID: AN10372439
• DOI: 10.2965/jswe.28.399
• COI: 1:CAS:528:DC%2BD2MXlvFyksbc%3D
• ISSN: 18813690
• ISSN: 09168958
• NDL BIB ID: 7394409
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7394409
• Web Site: https://www.jstage.jst.go.jp/article/jswe/28/6/28_6_399/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed