Human Impact on Spatial Water Temperature Variability in Lowland Rivers: a Case Study from Central Poland

Łaszewski, Maksym

doi:10.15244/pjoes/75174

Cited by 8 publications

(4 citation statements)

References 25 publications

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“…Temperature below the reservoir in summer months was lower or equal to the value measured above the reservoir. Łaszewski et al in 2018 showed that in the summer months, the temperature below the reservoir is higher than above the reservoir, which is at variance with the study results. It should be emphasised, however, that the Utrata in front of the reservoir in Komorów is not a regulated river.…”

Section: Discussioncontrasting

confidence: 72%

The influence of a dam reservoir on water quality in a small lowland river

Dębska

Rutkowska

Szulc

2021

Environ Monit Assess

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The paper presents the effects of the dam reservoir in Komorów on the water quality in the Utrata river. The implementation of the adopted objective involved a comparison of water quality at two points, above and below the reservoir. The Utrata River is polluted with biogenic compounds throughout the whole section studied. COD content also indicates significant contamination exceeding permissible limits. A positive effect of the reservoir on water quality in the river was also observed in terms of the content of dissolved oxygen, with concentration increasing below the reservoir. The reservoir had a positive effect on reducing the concentration of total phosphorus in the water. Water in the Utrata below the reservoir showed higher values of chemical oxygen demand (CODMn) than above the reservoir. There were no differences in the concentration of NH4+ and NO3- ions in the water before and after the reservoir.

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Section: Discussioncontrasting

confidence: 72%

The influence of a dam reservoir on water quality in a small lowland river

Dębska

Rutkowska

Szulc

2021

Environ Monit Assess

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“…Seasonal changes in water temperature were generally closely related to the air temperature pattern [75,76]; however, the results should be treated with caution due to the clear diurnal water temperature dynamics observed in rivers and streams [77] which the grab sampling method does not take into account. Nevertheless, attention could be paid to the Da ńków stream (site T5), which was characterized by a lower annual temperature range compared to other sites.…”

Section: Relationships Between Precipitation and Biogenic Concentrations And Between Chemical Compoundsmentioning

confidence: 85%

Spatial and Seasonal Dynamics of Inorganic Nitrogen and Phosphorous Compounds in an Orchard-Dominated Catchment with Anthropogenic Impacts

Stępniewski

Łaszewski

2021

Sustainability

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The influence of various types of agricultural activities on the dynamics of biogenic compounds of flowing water was broadly recognized in many spatial and temporal scales. However, relatively minor attention was paid to the hydrochemical functioning of horticultural catchments despite their importance and dominance in some regions of Europe. Thus, the current study investigated spatial and seasonal variations in inorganic nitrogen and phosphorous compounds in stream water in the Mogielanka River catchment, with 72% covered by apple orchards. Water samples were collected from fifteen sites distributed across the catchment in the monthly timescale from March 2020 to February 2021. Concentrations of NO3−, NO2−, NH4+, and PO43− were determined photometrically, while in situ water temperature, oxygen saturation, electrical conductivity, and pH, were measured with the use of portable devices. The impact of horticulture was mainly documented in the higher concentration of NO3− during the winter months; however, maximum values did not exceed 15 mg·dm−3 and were relatively low in comparison to catchments dominated by arable lands. The authors also found a clear impact of unstratified reservoirs and inflows from wastewater treatment plants on the dynamics of biogenic compounds. The correlations of PO43− with the sums of precipitation suggested, in turn, that increased PO43− concentration mainly results from poor sewage management. The results provided preliminary but unique and spatially extensive insight into the functioning of an orchard-dominated lowland catchment and allowed the researchers to point out the main recommendations for improving water quality in similar regions.

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“…Consequently, sites represent catchments with a diverse area (ranging from 35.6 to 854 km 2 ), mean slope, land cover, as well as morphometric parameters of the channel and riparian shading. However, due to the urbanization of the catchments, some of the measurement sites (R3, R8, and R9) deliberately reflect different anthropogenic influences (Somorowska and Łaszewski 2017;Łaszewski 2018). Sites in the TR scale, with the catchment area ranging from 2.9 to 24.3 km 2 , were selected with a view to maximizing differences between catchment and channel properties, while their localization precluded direct anthropogenic modification of their thermal regime; moreover, an important criterion was whether these streams were permanently flowing during the summer period.…”

Section: Field Data Collectionmentioning

confidence: 99%

The effect of environmental drivers on summer spatial variability of water temperature in Polish lowland watercourses

Łaszewski

2020

Environ Earth Sci

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Thermal properties of streams and rivers, due to significant impact on biota and other physico-chemical water properties, were broadly recognized in hydrological literature last years. Nevertheless, water temperature of temperate lowland watercourses has received relatively small attention, despite the development of new measurement devices and techniques. Thus, the current study attempt to document spatial water temperature variability of lowland watercourses and examined the effects of environmental drivers on their thermal heterogeneity. For this purpose, water temperature was monitored from May to October 2017 with the use of digital data loggers in 20 sites located in central Poland, representing two spatial scales-main rivers (MR) and tributaries (TR). On the basis of the measurement data, statistical distribution of magnitude and variability water temperature parameters was presented, whereas cluster analysis (Ward method) was used to group sites similar in their thermal properties. Furthermore, selected catchment and channel metrics were computed using GIS software for each site, which in combine with the principal component analysis allowed to assess the effect of such metrics on thermal parameters. Then, to support the findings of PCA and assess meteorological dependence of the water temperature, linear regression between daily mean water and air temperatures was performed. The results indicate that in terms of magnitude and variability parameters TR scale sites demonstrated clear thermal heterogeneity, particularly in comparison to MR sites, characterized by similar thermal properties even between separate, independent catchments; in such sites the highest thermal contrast were related to anthropogenic impacts, such as reservoir releases and sewage inflows. Clear longitudinal zonation of water temperature parameters was found as presented by first two principal components, which was related to transition from small headwater sites to the largest, downstream catchments, driven mainly by changes of catchment area, mean slope, and width:depth ratio. The increase of the catchment area also resulted in a shift in linear regression parameters, which suggested higher meteorological control in the downstream direction and simultaneously, lower impacts of groundwater inflows. The obtained results provide new insight into lowland watercourses temperature behavior, being of primary significance in the context of fisheries and environmental management, particularly in the face of climate warming and increasing anthropopressure.

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Human Impact on Spatial Water Temperature Variability in Lowland Rivers: a Case Study from Central Poland

Cited by 8 publications

References 25 publications

The influence of a dam reservoir on water quality in a small lowland river

The influence of a dam reservoir on water quality in a small lowland river

Spatial and Seasonal Dynamics of Inorganic Nitrogen and Phosphorous Compounds in an Orchard-Dominated Catchment with Anthropogenic Impacts

The effect of environmental drivers on summer spatial variability of water temperature in Polish lowland watercourses

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