Lidia L. Tanaka, Miki Sudo and Syuhei Ban
Release Date: November 26, 2009

The spatial and temporal distribution of rice herbicides in Lake Biwa, Japan
Lidia L. Tanaka1), Miki Sudo1) and Syuhei Ban1)
1) University of Shiga Prefecture

(Received: October 20, 2009)
(Accepted for publication: November 22, 2009)

Abstract:
The plains on the lowlands surrounding Lake Biwa, Japan, have long been used for rice (Oriza sativa L.) cultivation. In this study, we investigate the fate of herbicides commonly used in this agroecosystem. During the spring, the highest concentrations of simetryn, mefenacet, bromobutide and dymron were detected on the lake’s surface and at the mid-depth (20 m), indicating that agricultural runoff enters the lake and directly affects its water quality. Our findings also suggest that these contaminants might serve as an indicator of the transport pathways of some agricultural pollutants into the lake.

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To cite this article:
Lidia L. Tanaka, Miki Sudo and Syuhei Ban: “The spatial and temporal distribution of rice herbicides in Lake Biwa, Japan”, Hydrological Research Letters, Vol. 3, pp.45-48, (2009) .
Copyright (c) 2009 Japan Society of Hydrology and Water Resources