Temat: Water Distribution Systems

Skocz do pozycji: 1.

Tytuł:: Biological stability of water in water distribution systems. The effect of water treatment trials
Autorzy:: Wolska, M.
Tematy:: water treatment
carbon
groundwater
microorganisms
nitrogen removal
organic carbon
surface waters
water aeration
water distribution systems
water supply systems
biological stability
inorganic nitrogen
uzdatnianie wody
węgiel
wody gruntowe
mikroorganizmy
usuwanie azotu
węgiel organiczny
wody powierzchniowe
napowietrzanie wody
systemy dystrybucji wody
wodociągi
stabilność biologiczna
stężenie dwutlenku węgla
azot nieorganiczny; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/206902.pdf Link otwiera się w nowym oknie
Opis:: Research into the removal efficiency of biogenic substances, necessary for the growth of heterotrophic microorganisms, was carried out for the following water treatment trials: surface water, infiltrative water and mixed surface water after microsieving with aerated underground water. The results have shown that the efficiency of removal of organic substances, independently of the type of treated water, increased along with the organic carbon concentrations in raw water. The average effectiveness of phosphate removal was: 92.1%, 88.8% and 83.7% for surface, infiltrative and mixed water, respectively. In all analyzed systems, presence of phosphates was an limiting factor for the regrowth of microorganisms in the distribution system. In none of the water treatment trials, effective removal of inorganic nitrogen has been recorded.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The impact of temperature anomalies on sudden increase in water production and consumption
Autorzy:: Cieżak, Wojciech
Kutyłowska, Małgorzata
Tematy:: water piping systems
distribution systems
water companies
water consumption
water pipe network
water production
systemy rurociągów wodnych
systemy dystrybucji
przedsiębiorstwo wodociągowe
zużycie wody
sieć wodociągowa
produkcja wody; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/58971609.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the influence of weather conditions on water consumption in two selected water-pipe networks. The analyzed problem seems to be significant because even several days with extremely high temperatures cause exploitation difficulties in the distribution system due to water consumption exceeding the average. Water companies should be prepared for complications in exploitation when even whole water from reservoirs is supplied to the network. The obtained results show that a high correlation between anomalies in temperatures and water consumption exists, especially during weekends. The Pearson coefficient varied between 0.76 and 0.88 which means that the temperature has a significant influence on water demand. The aim of the work was also to note that reasonable usage of tap water by individual consumers can influence the security of water distribution. On days when extremely high external air temperatures are forecasted, water consumption for nonessential purposes, such as watering gardens or filling backyard pools, should be limited.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Routine forecasting of the daily profiles of hourly water distribution in cities. An effectiveness analysis
Autorzy:: Cieżak, W.
Cieżak, J.
Tematy:: forecasting
multilayer neural networks
neural networks
time series
water supply systems
water distribution
prognozowanie
wielowarstwowe sieci neuronowe
sieci neuronowe
szereg czasowy
wodociągi
dystrybucja wody; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/206970.pdf Link otwiera się w nowym oknie
Opis:: Sample results have been oresented of verifying three groups of methods of forecasting the time series of short-duration water distributions in city water grids. The analysis covered: ARIMA class models, the time series exponential smoothing methods and artificial neural networks. Since chronological sequences of observations from the immediate past were analyzed, the adopted models did not take any external variables into account. The forecasting errors in the case of multilayer perceptron neural networks were found to be comparable or smaller than the errors of prediction by the ARIMA class models and by the methods of the exponential smoothing of time series.
Dostawca treści:: Biblioteka Nauki

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