• Title/Summary/Keyword: Chunsoo bay

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The avifauna at Chunsoo bay (Seosan A and B area)

  • Cho, Sam-Rae
    • Journal of Environmental Science International
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    • v.12 no.2
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    • pp.163-170
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    • 2003
  • Seosan A, B area is located on 36°42' of north parallel and 126°27' of east longitude. It consisted of broad artificial lakes and reclaimed agricultural lands; there is Ganwalho lake in A area and Bunamho lake in B area. Total birds surveyed four times in 2001 at the A area are 105,580 of 11 orders, 28 families, 89 species. Among them, resident species were 21 species including Pica pica. Twenty species including Cuculus canorus were summer migrants, and 30 species including Platalea leucorodia were winter migrants. Seventeen species including Limosa limosa were occasionally species. And Rostratula benghalensis was an unconfirmed species. Species diversity index (H') was 0.72; species equally common index (e/sup H'/) was 2.06. In January, maximum observed 102,121 individuals. However in July 52 species were observed most variously. There were total 81,152 birds observed with 11 orders, 22 families, and 71 species at the B area. Fifteen species including Falco tinnumculus were resident species. Summer migrants were 18 species including Ixobychus sinensis. Winter migrants were 25 species including Ciconia boyciana. Thirteen species including Tringa glareola were occasionally species. Species diversity index (H') was 0.281; species equally common index (e/sup H'/) was 1.325. In January, maximum observed 78,433 individuals. However in Silly 42 species were observed most variously.

Environmental Assessment of $Cr^{6+}$ Occurring in Stabilizing Processes of Soft Sea-Bottom using Cement Stabilizers (시멘트 고화제 고결공법에서 발생하는 $Cr^{6+}$의 환경영향 검토)

  • 오영민;김경태
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.14 no.4
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    • pp.319-321
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    • 2002
  • Recently, the injection of cement stabilizer is used as one of ways to improve soft sea-bottom. However, this method makes an argument with $Cr^{6+}$subject to emerge to the seawater from the cement stabilizer. To investigate the amount of$Cr^{6+}$field measurements were carried out in Ochun harbor of Chunsoo Bay. The analysis shows the amount of $Cr^{6+}$in the seawater met the demand of environmental criterion.

Distribution of Dissolved Heavy Metals Released during Stabilizing Processes of Soft Sea-Bottom using Cement Stabilizers (시멘트 고화제 고결공법에 따른 공사장 주변해수의 용존성 중금속 농도 변화)

  • Kim, Kyung-Tae;Kim, Eun-Soo;Oh, Young-Min;Chung, Kyung-Ho;Cho, Sung-Rok;Park, Jun-Kun
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.8 no.2
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    • pp.74-77
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    • 2005
  • The injection of cement stabilizer is used as one of ways to stabilize soft sea-bottom. However, this method makes an argument for the possibility of releasing heavy metals from the cement stabilizer to the seawater. To investigate the effect of the cement stabilizer on the seawater, field measurements were carried out in Ocheon harbor of the Chunsoo Bay. Although the highest concentrations of dissolved heavy metals were found in the surface seawater of the injection point and the metal concentrations decreased with distances, the levels of heavy metals in all the seawater met the demand of environmental criteria of Korea, US and UK.

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Spatial Distribution of Tidal Flats in Korea (한국(韓國)의 간석지(干潟地) 분포(分布))

  • Jo, Myung-Hee;Jo, Wha-Ryong
    • Journal of the Korean association of regional geographers
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    • v.3 no.2
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    • pp.195-208
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    • 1997
  • On the basis of the topographic maps in the 1910's and 1990's and the classification map of Landsat TM satellite image photographed on Sept 1, 1996, the spatial distribution and the current situation concerning tidal flats in Korea were studied by measuring the area with GIS Arc/Info system and examining the regional condition required to develop the tidal flats. The results are as follow; The tidal flat resources in Korea cover an area of about 3800 square meters, including the reclaimed one since the 1910's. And they are widely distributed in the west coast of South Jeonla, Kyunggi bay, Asan bay, the south coast of South Jeonla, Kunsan bay, Chunsoo bay, and the coast of South Kyungsang and Pusan when put in the order from bigger area. Given the area under the construction at present, more than 50% of the tidal flats are reclaimed ones. The tidal flats are being developed especially in Kyunggi and Asan bays because they perfectly measure up to the conditions required. For Kunsan bay, a remarkably good supply system of the alluvial sedimentary materials and a favorable coastline requirement for the coast of the South Jeonla also contribute to the development of the tidal flats. In the case study of Kunsan bay, it was shown that the shape of the tidal flat is making a continuous change and the area is getting bigger in terms of the multi-temporal change of the tidal flat development. However, while in the first half of the 20th century, the increasing rate of the area was considered to be rather high, it is considerably lowered almost to a standstill in the latter half of the century.

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