• Journal of Environmental Science International
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• v.31 no.2
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• pp.103-116
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• 2022

Heavy metal contaminations were investigated in fishes inhabiting the basins of Andong, Imha and Yeongju dam basins along the upper stream of the Nakdong river. The characteristics of heavy metals contamination in fish were investigated based on sampling sites located in the Andong dam basin. The muscle tissue was analyzed for 267 objects of 26 species from the Andong dam, 50 objects of 17 species from Imha dam, 38 objects of 9 species fromYoungju dam basin.The type and amount of heavy metals concentrated in the body of the fishes was found to be species-dependent. The heavy metal species which contamination increase through the Seokpo smelter are chromium, zinc, cadmium, and lead, and these are very likely the influence of the smelter. The concentration of eight heavy metals in fish from the Andong dam basin was higher than that in fish from the Imha and Youngju dam basins; the values for zinc, arsenic, and cadmium were significantly higher. However, mercury and lead exhibited high values in the Imha and Yeongju dam basins, respectively.

• Journal of Veterinary Clinics
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• v.34 no.6
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• pp.401-403
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• 2017

Total 283 dogs were enrolled in this study (control group: 140, patient group: 143). In the patient group, 143 dogs with underlying diseases including immune medicated hemolytic anemia (IMHA) (7), lymphoma (30), hyperadrenocorticism (HAC) (16), trauma (10), pyometra (8), bone fracture (38), peritonitis (13), meningoencephalitis (12) and mitral regurgitation (9) were enrolled in this study. Compared with healthy group, lymphoma, trauma, HAC, and IMHA group showed significantly (P < 0.01) high values of D-dimer and the highest levels in the IMHA group. Additionally, we evaluated the D-dimer level after a week of enoxaparin treatment, and the results showed D-dimer levels of post treatment group were significantly decreased compared to the pre-treatment group in lymphoma, HAC, trauma and IMHA diseases. In the high level D-dimer group, post D-dimer values after enoxaparin treatment had significantly decreased (P < 0.01) compared to levels prior to treatment.

• Journal of The Korean Society of Agricultural Engineers
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• v.49 no.1
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• pp.3-13
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• 2007

In this study, spatial characteristics of rainfall in Imha basin were investigated by cross-correlation analysis among rainfall gaging stations and rainfall-runoff analysis used in HEC-HMS model for analysis of influence on observed rainfall. The Kriging technique was applied to rain(all analysis in Imha basin to reflect spatial characteristics of regional rainfall. Their results are compared to rainfall-runoff data with spatially distributed rainfall data as well as the classical thiessen method. The results by kriging technique approached by geostatistical method could reflect spatial characteristics of regional rainfall properly in Imha basin.

• Proceedings of the Korea Water Resources Association Conference
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• 2006.05a
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• pp.908-912
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• 2006

Geology and terrain of Imha basin has a very weak characteristics to soil erosion, so much soil particles flow into Imha reservoir and bring about high density turbid water when it rains a lot. Especially, since the agricultural area of Imha basin is mainly located in river boundary, Imha reservoir has suffered from turbid water by soil erosion. Therefore, it is important to estimate the influence of soil erosion to establish efficient management of water-pollutant buffering zone for the reduction of turbid water. By applying GIS-based RUSLE model, this study can acquire 12.23% that is the ratio of soil erosion in water-pollutant buffering zone and is higher than area-ratio (9.95%) of water-pollutant buffering zone. This is why the area-ratio of agricultural district (27.24%) in water-pollutant buffering zone is higher than the area-ratio of agricultural district (14.96%) in Imha basin. Also as the result of soil erosion in sub-basin, Daegok basin shows highest soil erosion in water-pollutant buffering zone, second is Banbyeon_10 basin and last is Seosi basin.

• Economic and Environmental Geology
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• v.39 no.6 s.181
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• pp.771-786
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• 2006

Imha lake has a high turbid water which keeps up during a few months, as comparing to other dams. Origins of the high turbid water derive from suspended materials which compose of micro particles of clay and rock-forming minerals. They are the weathered products from surface rocks that relate with particular geology in drainage field of the Imha dim. Accordingly we have fundamentally surveyed the kinds, properties, distribution and structures of general geology, found a few particular geology that source clay materials, and traced the passage that their weathered products enter the dam. We have suggested the basic origins of increase in turbid degree from detecting kinds and behavior of the suspended materials cause high turbid water in the Imha lake.

• Journal of the Mineralogical Society of Korea
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• v.20 no.3
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• pp.213-222
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• 2007

Changes of turbidity and suspended solid concentration of inflow tend to be very similar in Andong and Imha dam, and show significant effect on the amount of rainfall. Concentrations of suspended solid and turbidity in Imha are higher than these of Andogn dam, and Banbyon have higher values than that of Yongjeon stream in Imha dam. There is no difference in size distribution and mineral composition of the suspended particles in Andong and Imha dam. The turbidity-causing materials are composed of vermiculite. illite, kaolinite, quartz and albite. X-ray diffraction analysis shows that turbidity-causing materials are have similar mineralogy between Andong and Imha Dam, but they have different abundance.

• Journal of Life Science
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• v.20 no.9
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• pp.1378-1384
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• 2010

The present study aimed to investigate the effect of heavy metal contamination in the aquatic environment on the fishes (Opsariichthys bidens, Cyprinus carpio, Hemiculter eigenmanni and Culter brevicauda) inhabiting Andong and Imha reservoirs by comparing and analyzing the heavy metal contents accumulated in their tissues. Heavy metal contents were shown to be higher in the Andong reservoir than in the Imha reservoir. Accumulated heavy metals, Cr, Cu and Pb, were detected in tissues and bone tissues, but Cd was also found in the kidneys. Zn content was the highest among accumulated metals, whereas Cu content was the lowest in all tissues from the fishes in the Andong and Imha reservoirs. However, the amount of Cr in the tissues showed a twofold higher level in the Andong reservoir than that in Imha reservoir. The heavy metal contents of fish inhabiting the Andong reservoir were detected to be higher than those in the Imha reservoir. We also proposed that heavy metal contamination in water and its inhabiting fish is attributed to various heavy metals derived from water and sediments in the water environment of the Andong reservoir.

• Journal of Life Science
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• v.17 no.8 s.88
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• pp.1104-1110
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• 2007

The number of investigated fish collected from the Andong and the Imha reservoir were 2,540 individuals 20 species belonging to 7 families, 850 individuals 11 species belonging to 4 families respectively from May 2005 to March 2006. The total number of the common 3 species individuals investigated caught from the Andong reservoir and the Imha reservoir were 486 individuals and 124 individuals respectively. The investigated individuals is similar(${\pm}2.5$ mm) to 171 individuals make a comparative study. The Opsariichthys uncirostris, Culter brevicauda, Hemiculter eigenmanni of length-weight relationship were TW = $0.00007TL^{3.0543}$, TW = $0.0000009TL^{3.3654}$, TW = $0.00000^{3.3872}$ in the Andong reservoir and TW = $0.00002TL^{2.8493}$, TW = $0.00001TL^{2.8744}$, TW = $0.000004TL^{3.1082}$ in the Imha reservoir respectively. The Condition factor(K) of the Andong reservoir showed the positive slopes in all three species and to be in a good nutrition condition; where as the condition factor(K) of the Imha reservoir showed the negative slopes in two species except in H. eigenmanni and appeared to be in a little bad nutrition condition. Relative condition factor(Kn) indicating that O. uncirostris and C. brevicauda in Andong reservoir is more rotund than ones of Imha reservoir but H. eigenmanni in the Imha reservoir is more rotund than the ones of the Andong reservoir.

• Spatial Information Research
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• v.15 no.1
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• pp.25-33
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• 2007

The purpose of this study is to assess spatio-temporal variation of Imha Dam water quality according to suspended sediment algorithm using Landsat and SPOT 5 data. In order to learn synchronous suspended sediment concentrations(SSC) in Imha Dam waters, the satellite remote sensing data are analyzed. The key procedure of this research is that we should know the relationships between suspended sediment concentrations and satellite-detected reflectance. However, the SSC algorithm has the limitation that it must be compared calculated SSC with synchronous ground-truth data in the Dam water. Based upon the linear response from satellite-detected reflectance, SSC algorithm validated an efficient algorithm to estimate proportional factor and then derived an empirical equation far SSC estimations.

• Journal of Korean Society for Geospatial Information Science
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• v.12 no.4 s.31
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• pp.75-81
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• 2004

Because geological types and land cover conditions of Imha basin have a very weak characteristics to soil erosion, most soil particles (low into river and bring about high density turbidity in Imha reservoir when it rains a lot. This study used GIS-based RUSLE model and analyzed soil erosion to make basic data for the countermeasures of turbidity reduction in Imha reservoir. Total soil erosion amounts was evaluated as 5,782,829 ton/yr using rainfall data(2003) and especially Dongbu-basin was extracted as most source area or soil erosion among Imha sub-basin. Also it was evaluated that soil erosion amount by RUSLE model was suitable by applying turbidity survey data.