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Properties of Water Quality and Land Use at the Rural Area in the Nakdong River Watershed
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 Title & Authors
Properties of Water Quality and Land Use at the Rural Area in the Nakdong River Watershed
Kim, Jin-Ho; Kim, Chan-Yong; Lee, Seong-Tae; Choi, Chul-Mann; Jung, Goo-Bok; Lee, Jong-Sik; Kim, Won-Il;
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This study was focused on understanding the agricultural non-point sources pollution in 72 rural catchments of Nakdong river watershed from 2001 to 2005 every two year. Also. Pearson correlations between water quality and basin characteristic were computed. Water quality of this study watershed was better in 2003 than any other period. The water quality of upstream was recorded from 0.040 to 0.510 dS/m in EC, from 3.55 to 22.60 mg/L in DO, from 0.32 to 16.64 mg/L in T-N, from 0.00 to 12.21 mg/L in , from 0.000 to 0.860 mg/L in T-P, and from 0.000 to 0.640 mg/L in . A the downstream, EC was measured from 0.030 to 0.520 dS/m, DO from 4.13 to 18.36 mg/L, T-N from 0.38 to 26.88 mg/L, from 0.10 to 20.12 mg/L, T-P from 0.002 to 0.820 mg/L, from 0.002 to 0.690 mg/L. But there was no difference between upstream and downstream for the water quality. Based on the correlation analysis between water quality and land use, correlation between BOD and residential was the highest positive correlation of 0.541 (p<0.01), and correlation between and forest was the highest negative correlation of -0.451 (p<0.01). Also, T-N, , and pH were not correlated with all basin characteristics and basin was not correlated with all water quality parameter. According to the correlation residential was causative of growing worst for water quality, and forest was causative of improving for water quality.
Water quality;Rural catchment;Nakdong river;Non-point source;Land use;
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