We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Instability of Water Quality of a Shallow, Polymictic, Flow-Through Lake.
- Authors
Ferencz, Beata; Dawidek, Jarosław; Toporowska, Magdalena
- Abstract
This paper describes catchment processes that favor the trophic instability of a shallow polymictic lake, in which a shift from eutrophy to hypertrophy occurs rapidly. In the lake, in 2007, the winter discharge maximum and an intensive precipitation (monthly sums exceeded 60 mm) in a vegetation season were observed. In 2007, the cyanobacterial blooms disappeared and the water trophy decreased. Total phosphorus (TP) was the main factor determining the high trophic status of the lake. The TP retention resulted from a quick flow of two inflows: QI1 (r = 0.64) and QI2 (0.56), and the base flow of tributary 1 (0.62). A significant negative correlation between TP and precipitation (r = − 0.54) was observed. Both the surface and the groundwater inflow of I4 showed a positive correlation with the retention of PO4 (r = 0.67 and r = 0.60, respectively), whereas the outlet discharge determined RNO3 (r = 0.57). The trophy of Lake Syczyńskie was determined by the relationship between nutrient input and export, expressed as the ionic retention, Carlson’s trophic state index (TSI), and phytoplankton abundance. The results showed that many factors influence the stability of water quality in small, polymictic lakes. However, in the studied lake, intense precipitation and winter discharge maxima (particularly base flow) prevented summer cyanobacterial blooms.
- Subjects
WATER quality; WATERSHEDS; MACROPHYTES; ALGAL blooms; X-ray diffraction
- Publication
Water, Air & Soil Pollution, 2018, Vol 229, Issue 5, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-018-3724-2