Heukcheon

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Heukcheon is a river of South Korea. It is a river of the Han River system and is a tributary of the Namhan River. The basin area is 314.02 km 2 and the total length is 37 km. Topographically, black forests are the largest part of the watershed with 73.92% and the agricultural area is 7.17%. The upper part of the river consists of gravel, pumice stone and rock. The river is highly affected by nonpoint pollution sources. [1]

South Korea Republic in East Asia

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Pumice Light coloured highly vesicular volcanic glass

Pumice, called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals. It is typically light colored. Scoria is another vesicular volcanic rock that differs from pumice in having larger vesicles, thicker vesicle walls and being dark colored and denser.

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References

  1. Choi, Kyungwan; Lee, Sangwon; Noh, Changwan; Lee, Jaekwan; Lee, Youngjoon (September 30, 2015). "Pollutant Load Characterization with Flow Conditions in Heukcheon Stream". Journal of the Korean Society of Water and Wastewater. 29 (5). Retrieved June 15, 2018.