Waterpraxis as a tool supporting protection of water in the Sulejow Reservoir

2017

E3S Web Conf.

Abstract. The paper presents water monitoring methods used to determine and predict the ecological status of large water bodies based on calibrated 3D water quality models. State monitoring system of quality of water was discussed and critically reviewed. Mobile measurements technique to collect vast number of measuring points across the large water body during one day cruise to make maps of pollutants distributions was described. Maps of water quality parameters show dynamic changes of spatial distributions of pollutants both in time and along the length of the lake which proves that one point measurements cannot be representative for the large water body. Critical evaluation of calibration principles and accuracy of the most frequently used water quality models, WASP and GEMSS are presented. On the basis of CFD calculations, close correlation between water quality and hydrodynamics in large water bodies regarding the physicochemical aspects and biological production was proved. Neglecting the effect of hydrodynamic on eutrophication process introduce large element of uncertainty in determination of nutrients flow in the large water bodies. An example of scenarios for improving the ecological potential of dam reservoirs to obtain significant reduction of selected nutrients concentration in the lake is discussed.

Section: Effect Of Hydrodynamics On Nutrients Distributionmentioning

confidence: 99%

Section: Effect Of Hydrodynamics On Nutrients Distributionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of factors affecting the ecological status of the large water bodies on the basis of monitoring and integrated 3D models

Zbiciński

2017

E3S Web Conf.

“…Surface waters of rivers, lakes and artificial reservoirs are subject to anthropogenic impact [1]. For this reason, they should be placed under particular protection and all activities in their vicinity should be well considered, assessed and periodically controlled [2,3]. Water in artificial reservoirs created by planned actions for various purposes, e.g.…”

Section: Introductionmentioning

confidence: 99%

Online Measurement Method of Water Quality in the Sulejow Reservoir

Ecological Chemistry and Engineering S

Adamiec

Imbierowicz

et al. 2018

The paper presents methodology of accurate mobile measurements of water quality parameters such as temperature, dissolved oxygen, chlorophyll “a” concentration, ammonium ion concentration, conductivity, pH and blue-green algae content in water. The measurements (probe EXO 2, YSI, USA) were made on various depths of probe immersion (1.5, 2.5 and 3.5 m) and at different towing speeds of the probe (approx. 5.4 and 9.0 km/h). Static measurements carried out on the same route provided reference values for the measurements in motion to compare the repeatability of static and mobile methods. The tests were also evaluated by observation of probe behavior in motion, e.g. water disturbance intensity, access of light (sun rays) to the sensors. Statistical tests confirmed that the mean values of water quality parameters from mobile measurements with the speed of 5.4 km/h at the depth 1.5 m does not differ from the stationary measurements. Results of statistical analysis prove that water quality parameters can be measured accurately keeping established speed of towing the probe at the fixed depth. Methodology of mobile measurements elaborated in the frame of this work allows to collect vast number of data which can be used to obtain GIS point maps of water quality parameters in large water bodies.

“…Sulejow reservoir is situated in the Voivodeship of Lodz, Poland (51 o 22` -51 o 28`N, 19 o 51 -20 o 01`S). The basic parameters of the lake are described in Table 1 (Ziemińska-Stolarska et al, 2013). …”

Section: Case Studymentioning

confidence: 99%

3-D CFD simulations of hydrodynamics in the Sulejow dam reservoir

Journal of Hydrology and Hydromechanics

Polańczyk

Zbiciński

2015

This paper reports the processes by which a single-phase 3-D CFD model of hydrodynamics in a 17-km-long dam reservoir was developed, verified and tested. A simplified VOF model of flow was elaborated to determine the effect of wind on hydrodynamics in the lake. A hexahedral mesh with over 17 million elements and a k-ω SST turbulence model were defined for single-phase simulations in steady-state conditions. The model was verified on the basis of the extensive flow measurements (StreamPro ADCP, USA). Excellent agreement (average error of less than 10%) between computed and measured velocity profiles was found. The simulation results proved a strong effect of wind on hydrodynamics in the lake, especially on the development of the water circulation pattern in the lacustrine zone.