영산강의 (榮山江) 저생동물에 (底生動物) 의한 생물학적 수질판정 (水質判定) = The Biological Estimation of Water Pollution Levels on the Benthos Fauna of the Yeong-san River

다국어 초록 (Multilingual Abstract)

1. The present work is to make a biological estimation of water pollution levels on the Benthos fauna of the Yeong-san River including its upper stream, the Go-su, the Hwang-yong, the Ji-suk and the Gwang-ju. Examinations were carried out three times; that is October 27, ` 72, May 27, ` 73, June 2, ` 73. The determination of degree of water quality was based upon macroscopic organisms. 2. The main source of water pollution in the Yeong-san River are thought to be urban sewage, the foul water from Hwa-sun coal mine, and reckless graval pickijg from the rever side. 3. A general survey of water pollution in estuary upper stream of Yeong-san River can be classified as follows; A. Non-polluted water basin. B. Polluted water basin by the foul water from coal mine. C. Polluted water basin by urban sewage. The map or water pollution level is prepared by a biological estimation on water in the three water basins. 4. The upper part of the Hwang-yong and Go-su brook is handicapped for living things to exist dueto reckless graval picking. This means that the increase of micro-organism is hinder, consequently the process of natural clarificction of polluted water is slowed down. 5. Viewed from the life from of benthic fauna in Yeong-san River, the aquatic insects living in clear water are plentiful in the upper part of the rever, but they are much fewer in species in the Gwang-ju brook which is corrupted by the drainage and chiefly tolerant Bae¨tis thermicus and polysaprobic benthic fauna which is Tubifex sp., Hepobdella lineata are found there as main living things.