Jarosław DawidekMaria Curie-Sklodowska University in Lublin · Zakład Hydrologii
Jarosław Dawidek
dr hab.
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36
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219
Citations
Citations since 2017
Publications
Publications (36)
Toxic cyanobacterial blooms are a well-known problem in eutrophic water bodies, but cyanobacterial toxicity in ambient springs is unexplored. Therefore, we studied the toxin content and effects of two extracts obtained from epilithic and benthic microbial mats containing different algae and filamentous cyanobacteria, Phormidium breve and Oscillator...
Groundwater is an extremely important natural resource, exploited for domestic, industrial, and agricultural use. Being a natural groundwater discharge at the topographic surface, springs are also important hotspots of biodiversity. The increasing demand for groundwater and climate change, are major threat to springs worldwide. This study presents...
UE regulations focus on methods of water quality monitoring and their use in rational management practices. This study investigated horizontal and vertical variations of electrical conductivity (EC), pH, dissolved oxygen (DO), and chlorophyll a (Chl-a) in a shallow polymictic lake. Monitoring of short-term variability of physical and chemical lake...
This chapter discusses the forms and ways of functioning of the lakes in river valleys in Poland. Due to the specific nature of these objects, which are characterized by a distinct separation from natural and artificial lakes, the knowledge gathered so far concerning the appropriate nomenclature and classification has been systematized. The paper p...
The Bug River, in the section between Dorohusk and Włodawa (part of the eastern UE border), is one of the last remaining natural rivers in Europe. Thus, its abundance of floodplain lakes (FPL) in that part constitutes an area which preserves biodiversity. This study presents an analysis of potamophases duration and the Potamophases Concentration In...
Within Poland, the Danube River basin includes three water regions:
Autotrophic lakes are regarded to function as net autotrophic systems in which mobilization of solar energy by phytoplankton, benthic algae, and macrophytes forms the base of primary production. However, they are also subsided by allochthonous inputs. In this paper, we tested three hypotheses explaining the role of allochthonous subsidies as a driv...
Due to global warming and increasing water eutrophication, understanding in-lake relationships is paramount to prevent excessive pollution and further negative changes in lakes. The physico-chemical and biological parameters, as well as nutrient variabilities, both temporal and vertical (in the water column), were studied in the largest Łęczna-Włod...
Research on lake‐catchment and biological processes is still innovative. Few reports on this topic exist in the scientific literature. This paper presents species richness, diversity, biomass composition of phytoplankton, and occurrence of cyanobacterial blooms in relation to complex lake‐catchment processes in four shallow lakes. The results revea...
The role of confluence (flowability) in shaping the concentration of dissolved oxygen (DO), chlorophyll-a (chl-a) and pH was determined using a model approach. The calculations considered both horizontal and vertical variability of parameters. There was a general tendency for the pH and oxygen to increase along the transect connecting the place of...
![Monthly sums of precipitation [mm] during the study period (1) 2007...](publication/324632435/figure/fig2/AS:962213162532903@1606420903550/Monthly-sums-of-precipitation-mm-during-the-study-period-1-2007-water-year-2-2008_Q320.jpg)
![Variability of ionic load [kg year⁻¹] in the study period. a NO3. b...](publication/324632435/figure/fig4/AS:962213162528779@1606420903940/Variability-of-ionic-load-kgyear-in-the-study-period-a-NO3-b-NH4-c-PO4-d-TP-I1_Q320.jpg)
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 bloo...
Although water quality has been the main concern of ecologists over the last decades, a deterioration of both the quality and quantity of water has been observed worldwide. Understanding the dominant processes shaping eutrophication processes is crucial to sustainable water management in lake catchments. The aim of the study was to determine the im...
The main ecological and hydrological features of floodplain lakes (FPL) depend on the flood pulse. Temporal variations of connectivity result from natural fluctuations in a parent river water levels. The study area was a fragment of left fraction of the Bug River valley, within a gorge-like section between Dorohusk and Włodawa. The aim of the study...
The general role of river water input in shaping the basic morphometric parameters of floodplain lakes has been previously investigated. However, the process has not been quantitatively described in detail. This study is the first attempt in the literature to determine the allometric relation between fluvial impulse, expressed as Fluvial Connectivi...
A synthetic index LSI (Langelier Saturation Index) was calculated to analyze conditions of carbonates allocation. The higher LSI value, positive or negative, the better conditions to deposition or chemical denudation, respectively. Physical–chemical research was carried out in the lake-catchment system of Lake Syczyn´skie, located in the border zon...
Floodplain lakes (FPLs) constitute a very important element of river valleys, both in terms of ecology and hydrology. Dynamic physicochemical, morphometric and biological changes of lake waters are determined by the variability of the functional periods of lakes: limnophases, potamophases and inundations. This paper presents factors that shape long...
The paper presents a new approach to calculating the erosion and deposition values of floodplain lake basins, the erosion–deposition index (EDI). The EDI is a sum of the basin geometry indices (BGIs), which can be calculated for a separate cross section of the lake. The distribution of processes within the basin was investigated in two selected flo...
Flushing time (Tf) is an important factor which determines the hydrological, ecological
and chemical functioning of lakes. However, it has never been calculated on the basis of underground supply for Polish Lakes. Due to their high altitudes, the lakes in question constitute a distinctive group among the Łęczna-Włodawa Lakes. They are located in th...
Purpose
– The purpose of this paper is to assess the scale of changes in the distribution of water and their influence on the components of the hydrological balance in two lake catchments situated in the Leczna-Wlodawa Lake District.
Design/methodology/approach
– In order to estimate the scale of man-made modification of water distribution an anal...
This study is the first attempt in the literature on the subject of
comparing water balance components for floodplain lake basins, depending on
the type of a lake connection to the parent river. Research was carried out
in the Bug River valley in 2007–2011 water years. Four types of connections
were distinguished in the area under study. Simple wat...
Lake-catchment relationships were presented with reference to each part of the subsystem. Ionic loads reflected the potential of the catchment areas and displayed the following pattern: Lake Rotcze < Lake Sumin < Lake Syczyńskie; with respect to every ion, except nitrogen. The highest specific load of ions in Lake Syczyńskie and the strong hydroche...
Lake-catchment relationships were presented with reference to each part of the subsystem. Ionic loads reflected the potential of the catchment areas and displayed the following pattern: Lake Rotcze < Lake Sumin < Lake Syczyńskie; with respect to every ion, except nitrogen. The highest specific load of ions in Lake Syczyńskie and the strong hydroche...
A synthetic index LSI (Langelier Saturation Index) was calculated to analyze conditions of carbonates allocation. The higher LSI value, positive or negative, the better conditions to deposition or chemical denudation, respectively. Physical–chemical research was carried out in the lake-catchment system of Lake Syczyńskie, located in the border zone...
Flushing time (T f) is an important factor which determines the hydrological, ecological and chemical functioning of lakes. However, it has never been calculated on the basis of underground supply for Polish Lakes. Due to their high altitudes, the lakes in question constitute a distinctive group among the Łę czna-Włodawa Lakes. They are located in...
This study is the first attempt in the literature on the subject of comparing water balance components for floodplain lake basins, depending on the type of a lake connection to the parent river. Research was carried out in the Bug River valley in 2007-2011 water years. Four types of connections were distinguished in the area under study. Simple wat...
Total dissolved solids (TDS) in lake and catchment water is a result of geological structure, as well as duration of rock and water contact and human activity. In this paper, a potential dissolved solids (PtDS) in three Łęczna–Włodawa Lake catchments was determined using extraction and computer software (GIS and AquaChem). Human pressure on water q...
The research was carried out in three Łęczna-Włodawa lake-catchment systems, during the hydrological years 2007-2009. The observed lakes varied in terms of basin morphometry and catchment features. The hydrological functioning of the lakes resulted from three main factors: 1) storage capacity of the lake basin, 2) catchment area and relief, 3) huma...
Fluvial lakes are a very important part of the natural or quasi-natural river valleys. Although their origin is usually identified with the process of cutting off the meandering neck, there is also a large number of other processes responsible for floodplain basin creation. The first classifications of the floodplain lakes were very simple. All the...
Spatial variation of basin supply as a factor of water quality in a shallow, flow-through lake
Lake Syczyńskie is a water body that represents a group of the smallest Łęczna-Włodawa Lakes. The lake is supplied with waters from the four streams, while the outlet from the lake is directed into the Świnka River. The residence time of water is very sho...
Lake Syczyńskie is located in an important border zone between highland and lowland belts. This small and shallow reservoir is exceptional (among Łęczna–Włodawa Lakes) whith respect to an extraordinary intensity and seasonal changeability of eutrophication processes. Seasonal changes of ion total loads proved that despite high biogenic compounds su...
As natural water reservoirs, lakes are characterised by a great variety of processes, starting with the phenomenon of the basin's origin, through to the forms of supply, the rate of water exchange (along with the water quality characteristics) and hydrobiological phenomena. Limnimetric measurements are an important element generally applied in rese...
Studies were carrying out in two shallow (mean depth ≈ 0.3 m) and small (area 2.7-8.2 ha) river lakes, which were flooded by water of River Bug (Eastern Poland) once a year (in spring). The species composition, biomass of phytoplankton and concentration of chlorophyll a were studied. Samples were taken in June (after flooding) and in August (after...
Proposed typology constitutes an attempt to systematize problems related to the researches on the basic river lakes. The existing classifications: genetic, trophic, thermal (concerning the waters mixing mechanism) as well as many others, helped to set this issue in order on the global scale becoming widely accepted and applied typologies. However,...
The construction and operation of the Wieprz–Krzna Canal (W-KC) brought about transformations in the hydrosphere of an environmentally precious area of the Łęczna–Włodawa Lake District. The dissection of the flat area by a dense ditch network intensified the runoff processes and thereby – ground overdrying. According to the designers, proper functi...
Projects
Project (1)
The aim of the project is to determine the temporal and spatial variability of allometric relationships between selected abiotic and biotic components of selected lake-catchment systems. The aim will be reached estimating allometric relations e.g. between ionic load delivered to the lake basin and ionic retention in lake waters. The main hypothesis of the research assumes that: a) hydrological processes such as the quantity and form of lake supply, the rate of water exchange, ionic load show allometric relations to the value of ionic retention in the lake waters, b) retention of dissolved mineral matter, which is a function of the ionic allocation (not instantaneous concentration of particular ion in lake water) decide on the population dynamics of aquatic organisms, in accordance with the scaling law.
