Because of contaminant increase with development of industry and growth of population, quality of surface water for supply system is becoming worse. In consequence, groundwater is becoming important due to it's good quality. In natural state, the quality of groundwater is affect by regional geology ...
Because of contaminant increase with development of industry and growth of population, quality of surface water for supply system is becoming worse. In consequence, groundwater is becoming important due to it's good quality. In natural state, the quality of groundwater is affect by regional geology because groundwater recharges, flows, and discharges through geological media. This study deals with the characteristics of groundwater flow and quality in Changwon area, Korea. Changwon city is the capital of Gyeongnam province and population of about 500,000. Thus, Changwon city has various contamination sources of groundwater caused by industry and living. Equipotential lines are plotted using 29 data in 2002 and 324 data in 1996 obtained by the measurement of groundwater levels. The result of groundwater level data shows that water table in most part of the study area is lower than normal natural condition. The relation of groundwater level(Gl) and surface elevation(Se) indicates high correlation coefficient of 0.82 and the equation of regression line is Gl - 0.88 x Se 14.9. Transmissivity ranges from 3.29×10^(3) to 7.202×10^(9) ㎡/sec from aquifer test and slug test analyses. DRASTIC index ranges from 74 to 163 in the study area. The index is higher in the area near Namchon stream than in other industrial areas. Groundwater quality analysis was done for inorganic major components of data from 50 locations and surface water from 3 places. Concentration of the chemical components is different between groundwater and surface water. However, the difference of groundwater qualities is not obvious for different land uses. On the trilincar diagram, concentrations of cations are scattered. The trend is explained by seawater intrusion in the past topography. As the result of chemical analysis in 1996, 15.5% of 551 groundwater data exceed water quality standard. Main contaminants (NO_(3)-N, trichloroethlene, Cl etc.) originate from micro organism. Inorgarnic components in detection order and detection rate are indifferent for different land uses. Trichliroethlene among organic contaminats is most dominant as 13.6% in downtown area and 41.3% in industrial area. Such a different trend between organic and inorganic contaminants is distinct in industrial area. The natural recharge rate of groundwater in the study area is estimated as average 44,587,000 ㎥/yr with precipitation data from 1993 to 2002. Thus, the pumping amount of groundwater is smaller than natural recharge rate in the study area. However, since discharge capacity is different depending on different part of the study area, groundwater should be diverged from the areas of large production capacity and small population to those of small production capacity and large population.
Because of contaminant increase with development of industry and growth of population, quality of surface water for supply system is becoming worse. In consequence, groundwater is becoming important due to it's good quality. In natural state, the quality of groundwater is affect by regional geology because groundwater recharges, flows, and discharges through geological media. This study deals with the characteristics of groundwater flow and quality in Changwon area, Korea. Changwon city is the capital of Gyeongnam province and population of about 500,000. Thus, Changwon city has various contamination sources of groundwater caused by industry and living. Equipotential lines are plotted using 29 data in 2002 and 324 data in 1996 obtained by the measurement of groundwater levels. The result of groundwater level data shows that water table in most part of the study area is lower than normal natural condition. The relation of groundwater level(Gl) and surface elevation(Se) indicates high correlation coefficient of 0.82 and the equation of regression line is Gl - 0.88 x Se 14.9. Transmissivity ranges from 3.29×10^(3) to 7.202×10^(9) ㎡/sec from aquifer test and slug test analyses. DRASTIC index ranges from 74 to 163 in the study area. The index is higher in the area near Namchon stream than in other industrial areas. Groundwater quality analysis was done for inorganic major components of data from 50 locations and surface water from 3 places. Concentration of the chemical components is different between groundwater and surface water. However, the difference of groundwater qualities is not obvious for different land uses. On the trilincar diagram, concentrations of cations are scattered. The trend is explained by seawater intrusion in the past topography. As the result of chemical analysis in 1996, 15.5% of 551 groundwater data exceed water quality standard. Main contaminants (NO_(3)-N, trichloroethlene, Cl etc.) originate from micro organism. Inorgarnic components in detection order and detection rate are indifferent for different land uses. Trichliroethlene among organic contaminats is most dominant as 13.6% in downtown area and 41.3% in industrial area. Such a different trend between organic and inorganic contaminants is distinct in industrial area. The natural recharge rate of groundwater in the study area is estimated as average 44,587,000 ㎥/yr with precipitation data from 1993 to 2002. Thus, the pumping amount of groundwater is smaller than natural recharge rate in the study area. However, since discharge capacity is different depending on different part of the study area, groundwater should be diverged from the areas of large production capacity and small population to those of small production capacity and large population.
AI-Helper
※ AI-Helper는 부적절한 답변을 할 수 있습니다.