저수지역 식물의 군집특성 및 수질영향 평가

Abstract

This study carried out submerged area due to Dam construction in the near future. Itincludes species classification of plant, survey of community structure, examination of pollutantload and assessment of water quality impact.The vascular plants of this area are listed 224 taxa; 64 families, 168 genera, 193 species, 30varieties and 1 form. This study area is classified into total 21 communities, most communitywas consist of grass vegetation. Among the communities, Erigeron annuus(869,286m2, 22%)community was dominant and Erigeron annuus-Avena fatuacomminity (16%) was subdominantuntil May, and then Erigeron canadensiscommunity occupied most area to 1,774,985m2 (32%)from May to July.For the evaluation of water quality impact due to submerged macrophyte, nutrient releasetest was conducted both dead body macrophyte and living body macrophyte. The results ofrelease test show that T-N is not released at dead body macrophyte, but it is released at livingbody macrophyte, especially living body Artemisia pricepsvar. orientalisshows 1.436mgN/g. Atrelease test of dead body macrophyte, T-P release rate of Erigeron annuusshows 0.500mgP/g atthe top of them and it also shows 0.436mgP/g at Erigeron annuus of living body macrophyte.T-N load of submerged macrophyte shows 0.76% by comparison of total load on watershedand T-P load of that shows 3.61%. In case of removal macrophyte for reduction of pollutantload in submerged area, T-N load of submerged macrophyte changes from 0.76% to 0.15% byCorresponding Author: Lee, Yosang, Korea Institute of Water and Environment, KWATER, 462-1, Jeonmin-dong, Yuseong-gu, Daejeon,305-730, Korea. Tel: 82-42-860-0363 Fax: 82-42-860-0369 E-mail: yslee@kwater.or.kr