Relationship between the Water Quality Elements of Water Bodies and the Hydrometric Parameters: Case Study in Lithuania

Abstract

The larger and deeper lakes and ponds are, the better the conditions for spontaneous water purification, slower hydrobiological processes and slower accumulation of sediment. The goal of this research was to assess the ecological status of selected Lithuanian lentic water bodies and the impact of morphometric indicators on water quality. Multiple studies were conducted on 29 lakes and 10 ponds located throughout Lithuania in 2014–2018. The study proved that higher maxima and average depths of lakes correlate with lower Ptotal, Ntotal yield and macrophyte taxonomic composition values, indicating higher ecological status class. Higher chlorophyll a EQR, ichthyofauna taxonomic composition indicator for Lithuanian fish index LFI and Lithuanian lakes’ macroinvertebrate index indicates a higher ecological class. Larger lake areas contain smaller amounts of Ptotal and Ntotal, indicating better ecological status class; higher ichthyophane taxonomic composition in LFI, zoobenthos taxonomic composition indicator for Lithuanian lakes’ macroinvertebrates index (LLMI) and taxonomic composition of macrophytes MRI indicate better ecological status class. Larger lake areas contain lower chlorophyll a EQR values. Rapid water exchange improves the condition of the lake in addition to nitrogen, phosphorus and chlorophyll a EQR values. The faster the water exchange in the lake is, the lower the Ptotal and Ntotal values; faster water exchange in the lake also means higher chlorophyll a EQR values. However, slower water exchange indicates better ecological status of the macrophytic taxonomic composition of the MRI, the ichthyofauna taxonomic composition and the Lithuanian lakes’ macroinvertebrates index indicator of zoobenthos.

Seasonal variation of water quality of three urban small lakes in West Java, Indonesia

“…Previous study reported that highest phytoplankton abundance Lake Cibuntu and Lake lotus was found in August and September respectively [20]. The variability of dissolved oxygen (DO) in Lake Cibuntu, Lake Lotus and Lake Dora may be related to the changes of hydro morphological (water depth, water volume) and hydrobiological processes (overgrowth of phytoplankton and metabolism proses) in lake [21]. The stable value of dissolved oxygen (DO) concentration in Lake Cibuntu, Lake Lotus and Lake Dora in high water depth (November to December 2018) indicated a stability of biotic community in those periods.…”

Journal of Water and Land Development

“…On the other hand, Nielisz Reservoir is clearly larger than the remaining reservoirs (average water retention time is 77 days), which might have a positive effect on the degree of mineralisation of matter suspended in its waters. In large and deep reservoirs, the transport of organic matter to the bottom takes place over a longer interval of time, so the process of its mineralisation is more efficient than in small and shallow reservoirs [ČESONIENĖ et al 2020;WOJTKOWSKA, DMOCHOWSKI 2009].…”

Water Quality Prediction of Small-Micro Water Body Based on the Intelligent-Algorithm-Optimized Support Vector Machine Regression Method and Unmanned Aerial Vehicles Multispectral Data

“…pacity [63]. However, during the long-term monitoring, the water quality remained in the range of Class IV water standards (China Environmental Quality Standard for surface water.…”

“…For example, Kim et al The levels of water quality parameters in Region A were maintained at moderate levels. This might be because Region A is an inlet to the Chaohu Lake with a wide watercourse and strong liquidity and the water body has relatively higher self-purification capacity [63]. However, during the long-term monitoring, the water quality remained in the range of Class IV water standards (China Environmental Quality Standard for surface water.…”