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pp.677-682
This study was performed to provide the basic information on characteristics of groundwater pollution in Gyeongsan city. Forty two groundwater samples were collected, and pH, DO, COD, NH3-N, NO3--N, T-N, PO43--P, Cl, Ca, Mg, hardness, evaporate residues and others were investigated. And, ANOVA analyses were carried out to reveal the differences in water pollution indicator values of by industry, commerce/residence and agriculture areas. The results were as follows.
1. The mean values of pH, DO, COD, NH3-N, NO3--N, T-N, PO43--P, Cl, evaporate residues, Ca and hardness were 6.9, 7.9 ㎎/ℓ, 0.4 ㎎/ℓ, 2.44 ㎎/ℓ, 2.73 ㎎/ℓ, 6.06 ㎎/ℓ, 0.82 ㎎/ℓ, 32.72 ㎎/ℓ, 381.67 ㎎/ℓ, 41.53 ㎎/ℓ, 177.17 ㎎/ℓ, respectively.
2. As groundwater became deeper, the values of Cl, Ca, Mg, Na, hardness and evaporate residues remarkably increased, but those of COD, NH3-N, NO3--N, NO2--N, T-N decreased. 3. The values of COD, Cl, Ca, Mg, Na, hardness and evaporate residues were very high in industrial area, and those of NH3-N, NO2--N, T-N were very high in commercial/residential area, and those of NO3--N were a little high in agricultural area.
4. The correlations between depth and each value of Mg, Na, Fe, hardness and evaporate residues were highly positive, and those between DO and each value of Mg, Cu, Fe, hardness and evaporate residues were highly negative.
5. According to ANOVA analyses, the differences in three area groups (industry, commerce/residence and agriculture) on the values of NH3-N, T-N, evaporate residues, hardness, Ca, Mg, K and Fe were significant at 1% level.
