| Title |
Changes in the Water Environment Based on the Statistical Data in the Lake Paldang |
| Authors |
유순주 ( Soonju Yu ) ; 이은정 ( Eunjeong Lee ) ; 박민지 ( Minji Park ) ; 김갑순 ( Kapsoon Kim ) ; 임종권 ( Jongkwon Im ) ; 류인구 ( Ingu Ryu ) ; 최황정 ( Hwangjeong Choi ) ; 변명섭 ( Myeongseop Byeon ) ; 노혜란 ( Hyeran Noh ) |
| DOI |
https://doi.org/10.15681/KSWE.2018.34.6.688 |
| Keywords |
Algae; Paldang Watershed; Water Pollutant load; Water Quality |
| Abstract |
Since the 1970s regulations against the pollution of drinking water have been introduced in Lake Paldang watershed area. To understand the effects of water environment management policies and the impacts of climate changes on Lake Paldang, a long-term comprehensive study of this watershed and the changes in its water environment is required. In this study, we analyzed changes in the weather, hydrology, sources of pollution, water quality, and algal development from 2000 to 2015 year based on the statistical data provided by several national information systems. While the population and amount of sewage in the Lake Paldang watershed increased by about 1.5 times, the amount of animal manure showed a decreasing trend during the same period. The wastewater also increased by about 1.5 times while the amount of water intakes rose by about 1.14 times. The water quality in front of the Paldang Dam, which is the representative monitoring site of the Lake Paldang, was stable. The annual average BOD concentration remained within 2 mg/L, which is a “Good (lb)” level according to the environment standards of Republic of Korea. The development of phytoplankton and harmful cyanobacteria were largely influenced by meteorological factors. |