... road, Vientiane Capital City, Lao PDR ABSTRACT This study is highlighted to investigate the characteristics of pollutant runoff and relationships between pollutant load and runoff in an urban ... water quality is shown in Table 1. Journal of Water and Environment Technology, Vol. 7, No. 3, 2009 - 177 - Urban Runoff Pollutant Characteristics in Vientiane Capital, Lao PDR Atsushi ICHIKI*, ... low during low flow (dry day in rainy season and dry season) but was substantially higher during storm events due to increased runoff bringing particulate material into the channel, which indicates...