地下水窒素汚染における起源別窒素負荷率の重回帰法による推定

概要

論文の詳細を見る
Nitrogen loading factors, the ratios of nitrogen loading into groundwater, were estimated by multiple regression analysis on Miyako Isl., Okinawa, Japan. Geologically, the island is simply made of uplifted coral stones with the underlying unpermeable mud rocks, and the groundwater basins are separated mainly by faults itto 22. We carefully chose 9 study basins, taking account mainly of uncommunicativeness as a groundwater basin. In the regression analysis, the annualamount of nitrogen supplied to the basin environment, deriving from fertilizers, livestock wastes and domestic wastes were used as the predictor variables and the amount of nitrogen in the groundwater calculated by using surveyed concentration of nitrogen in groundwater as the criterion variables. As a result, the nitrogen loading factors of fertilizers, livestock wastes and domestic wastes were estimated at 40.0,44.1 and 68.9%, and the levels of significance were 0.3,8.3 and 56.5%, respectively.
社団法人日本土壌肥料学会の論文
2001-06-05