Unsteady 2-d chlorine transport in water supply pipes

Date

1999-12-01

Author

Ozdemir, ON
Ger, AM

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

93
views

0
downloads

Water supply networks are generally modelled for a day or longer time period. Under most circumstances, it is normal to omit the dispersive movement of chlorine and to assume that the convective transport dominates over dispersion. However, during night time operations the velocities are significantly decreased. This radical change in the velocity may therefore lead to the following question: can the available convection based quality models predict the chlorine concentrations accurately in time and space? An improved water quality model implies accurate estimation of concentrations at nodes in time and space at all levels of branching. To enhance the utility of water quality models dispersion may also be taken into account. In this paper, an effort that Led to the development of an unsteady 2-D convective-dispersive model is presented, and the model output is compared with the experimental results.

Subject Keywords

Ecological Modelling, Waste Management and Disposal, Pollution, Water Science and Technology

URI

https://hdl.handle.net/11511/65389

Journal

WATER RESEARCH

DOI

https://doi.org/10.1016/s0043-1354(99)00073-1

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

EFFECT OF TEMPERATURE, PH AND DO CONCENTRATION ON FILTERABILITY AND COMPRESSIBILITY OF ACTIVATED-SLUDGE SURUCU, G; Sanin, Faika Dilek (Elsevier BV, 1989-11-01) This study investigates the effect of aeration basin temperature, pH and dissolved oxygen (DO) concentration on filterability and compressibility characteristics of activated sludge. Laboratory-scale semi-continuous reactors, fed with synthetic wastewater were used. Effects of temperatures of 15, 20, 25, 30, 35°C; pH values of 5.7, 7.2, 8.2, 9.0 and DO concentrations of 0.5, 1.0, 1.5, 2.0, 5.0 ml/l were studied by keeping all the other parameters constant in each case. Results indicated that as the operatin...
Managing aquatic ecosystems and water resources under multiple stress - An introduction to the MARS project Hering, Daniel; Carvalho, Laurence; Argillier, Christine; Beklioğlu, Meryem; Borja, Angel; Cardoso, Ana Cristina; Duel, Harm; Ferreira, Teresa; Globevnik, Lidija; Hanganu, Jenica; Hellsten, Seppo; Jeppesen, Erik; Kodes, Vit; Solheim, Anne Lyche; Noges, Tiina; Ormerod, Steve; Panagopoulos, Yiannis; Schmutz, Stefan; Venohr, Markus; Birk, Sebastian (Elsevier BV, 2015-01-15) Water resources globally are affected by a complex mixture of stressors resulting from a range of drivers, including urban and agricultural land use, hydropower generation and climate change. Understanding how stressors interfere and impact upon ecological status and ecosystem services is essential for developing effective River Basin Management Plans and shaping future environmental policy. This paper details the nature of these problems for Europe's water resources and the need to find solutions at a rang...
Effect of vadose zone on the steady-state leakage rates from landfill barrier systems ÇELİK, BİRTEN; Rowe, R. K.; Ünlü, Kahraman (Elsevier BV, 2009-01-01) Leakage rates are evaluated for a landfill barrier system having a compacted clay liner (CCL) underlain by a vadose zone of variable thickness. A numerical unsaturated flow model SEEP/W is used to Simulate the moisture flow regime and steady-state leakage rates for the cases of unsaturated zones with different soil types and thicknesses. The results of the simulations demonstrate that harmonic mean hydraulic conductivity of coarse textured vadose zones is 3-4 orders of magnitude less than saturated hydrauli...
Unsteady 1D flow in unconfined nonuniform aquifers Onder, H; Banna, SM (1998-08-07) A one-dimensional groundwater now occurring in a finite, unconfined, nonuniform aquifer, which consists in two different regions, is considered. The aquifer is limited on one side by a flood channel and by an impervious formation on the other side. The flow occurs as a result of a sudden drop (or a rise) in the water stage of the flood channel. The now is investigated by two approaches; experimentally in a sandbox model in the laboratory and numerically using a digital model based on finite differences. The...
A chemical substitution study for a wet processing textile mill in Turkey Öztürk, Ertan; Demirer, Göksel Niyazi; Department of Environmental Engineering (2007) The main environmental concern in the textile industry is about the amount of water discharged and the chemical load it carries. The total quantity of chemicals used in textile mills varies from 10% to over 100% of the weight of the cloth produced. Many chemicals currently used in the textile industry affect the amount and the type of waste produced and their influence the aquatic life of the receiving stream. One of the critical steps in pollution prevention studies is auditing the use of chemicals and mak...

Citation Formats

O. Ozdemir and A. Ger, “Unsteady 2-d chlorine transport in water supply pipes,” WATER RESEARCH, pp. 3637–3645, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65389.