The purpose of this study is to demonstrate an application of a hydroinformatics methodology for analysis of transport timescales in a large reservoir. Therefore, a laterally averaged two-dimensional numerical model was used to estimate the transit time, flushing times and combination of these two timescales by modeling about 230 scenarios in the Dez reservoir. The model was calibrated using temperature profiles and then executed for a period of two years (2002–2004). A possible characterization of the flushing time as e-folding time was investigated and the results revealed that the e-folding time, which is simpler to estimate, can be used in place of the flushing time in the Dez reservoir. The effects of the location of the outlet on each of these timescales were also investigated. Results indicated that the mean residence and flushing times have their smallest value when the outlet is set in the middle of the Dez dam. The mean flushing times were also less sensitive to thermal structures of the Dez reservoir than the transit times. Finally, the temporal patterns of these timescales were elucidated. It was found that no single transport timescale can be used for all conditions.
- IWA Publishing
- On the estimation of transport timescales – case study: the Dez ...
Release Announcement – SymphoniePRO Desktop Application V.3.0
We are excited to share the latest version of software for the SymphoniePRO Data Logger. This release, version 3.0, introduces exciting new functionality as well as performance improvements. Below are some of the highlights: Utility Enhancements Like POPAuto, which was included in SymphoniePRO Desktop Application version 2.0, version 3.0 of SymphoniePRO Desktop now installs a similar productivity-boosting lightweight utility called OutAuto. OutAuto can be used to extract hundreds of raw logger data files from...
Interview with Senior Vice President, Jordi Verdés, at iWater, Barcelona 2016
Kurita has attended to the first edition of iWater in Barcelona between 15th and 17th of November. Take a look at the interview with Jordi Verdés, Senior Vice President of Kurita Europe GmbH. He highlighted Kurita´s contribution to the environment through water and paper applications. Interview with Senior Vice President of Kurita Europe, Jordi Verdés, at iWater, Barcelona 2016
Toxicological and Environmental Safety Data - Case Study
IntroductionAGRAGEL is a cross-linked copolymer of acrylic acid and acrylamide partially neutralized as potassium/ ammonium salt. The polymer is in its dry form a granulate and forms a gel-like material upon addition of water or aqueous solutions. Due to the cross-linking it is insoluble in water. Uptake of water is facilitated mainly by the negative carboxylic groups of the polymer and their hydration with water molecules. Complete solubilization is hindered because of the cross-linking of different polymer...
Arsenic adsorption using Fe(III)-loaded porous amidoximated acrylonitrile/itaconic copolymers
A highly selective polymeric ligand exchanger was developed for the removal of trace As(V) from aqueous solution. This adsorbent was prepared by loading Fe(III) onto porous amidoximated polyacrynitrile (AN)/itaconic acid (IA) copolymers (Fe(III)-AO AN/IA). Negligible ferric ion dissolution was observed from Fe(III)-AO AN/IA in solution of acidic pHs up to 2. As(V) adsorption by Fe(III)-AO AN/IA is a pH-dependent process with maximum capacity of 1.32 mg/g at pH 2–3. The adsorption process was found to be governed...
Alkaline fermentation of waste activated sludge stimulated by saponin: volatile fatty acid ...
Volatile fatty acid (VFA) production stimulated by saponin (SP), an environmentally friendly bio-surfactant, was investigated during sludge alkaline fermentation in laboratory studies and pilot applications. The combined use of SP and pH 9 condition significantly enhanced VFA production to approximately 425 mg COD/g VSS, which was 4.7-fold of raw sludge and 1.5-fold of sole pH 10 adjustment (the optimum pH for alkaline fermentation). Further results indicated that SP & pH 9 condition provided sufficient...