国立研究開発法人 国際農林水産業研究センター | JIRCAS

Relationship between the Characteristics and Water Quality of Irrigation Ponds in Japan

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

This study dealt with the relationship between the characteristics of irrigation ponds and water quality. We conducted a statistical analysis of 556 irrigation ponds located in urbanized rural areas and flat rural areas throughout the country, and examined a number of indicators of water quality such as pH, chemical oxygen demand (COD), contents of total phosphorus (T-P) and total nitrogen (T-N). There were no strong correlations between the characteristics of the irrigation ponds and water quality. We then conducted a similar analysis of the ponds after classifying them into 4 groups based on hydraulic and meteo rological characteristics. In this analysis, a strong relationship was found for the water quality in each group of ponds. We also studied the nitrogen load in the effluent from the catchment basins and found that diffuse non-point-source nitrogen was the major constituent. Relative intensity of the factors affecting water quality was investigated by multiple regression analysis and box plot analysis.

刊行年月2000-07-01
作成者Junji TAKAHASHI Eisaku SHIRATANI Ikuo YOSHINAGA
データ作成日2000-07-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
34
3
開始ページ175
終了ページ182
言語eng