| Title |
Physical and Chemical Characteristics on Pond Dansanji , Located in Taegu City , Korea . |
| Authors |
김기태 ; 안유환 ( K . T . Kim ; Y . H . Ahn ) |
| Abstract |
In order to elucidate hydrological environment, air and water temperature, water transparency, dissolved oxygen and chemical oxygen demand were measured in a small pond Dansan located in Taegu City, Republic of Korea, from August 1983 to February 1984. Thermocline represent significant variation between summer stagnation and autumn circulation of water mass. For climatical and hydrological season, equation between waterdepth (Z) and number of delayed days (D) is the following: D=28.7 3√Z(m). Values of dissolved oxygen ranged from 10.8 to 13.3 ppm on surface, and from 0 to 4.0 ppm in bottom, which represents clear variations in proportion to depth. Values of chemical oxygen demand arc maximal in 3 m depth (September), and minimal in 6 m depth (February). Euphotic layer mainly linked to solar radiation does not generally extend to the bottom. Water mass of this pond permits only primary production to about 5 m depth. |