6 results found

1. graph all sources on a singe graph in quality runs

   The graphing tool in a quality run now only alows for two different sources. but I would like to know the consistency of water on any point in time of all defined scource nodes.
   E.G. the consistency of node X is 36% from source X, 13% from source Y, 29% from source Z and 22% from an unknown/undifined source.
   This would make water trace maps a lot more interesting.

   4 votes

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2. Temperature variation for the PSO bulk chlorine decay model in the MSQ module of InfoWorks

   The reactive-constituent (PSO) chlorine decay model (Fisher et al. 2017) was provided to users in the MSQ module of InfoWorks in July 2020 (see the MSQ blog for details). A major advantage of this model is that only a single set of four model coefficients is required to characterize decay rate in a given bulk water throughout a distribution system, over a wide range of initial chlorine concentration and any number/size/timing of booster doses, at a single temperature.

   Water temperature commonly differs by 20 degrees Celsius between summer and winter, causing reaction (decay) rates to differ typically by a factor of four (or more in warmer climates). Fisher et al. (2012) extended the PSO bulk decay model to account for this temperature variation with the Arrhenius equation, which requires only one additional (fifth) constant coefficient to to complete the characterisation of the same bulk water. The accuracy of the extended model was demonstrated in the same paper and in applications to numerous Australian distribution systems since then.

   The five constant coefficients that completely characterise chlorine decay rate must be derived from laboratory decay tests under controlled laboratory conditions because there are many different substances (and concentrations) in a given source water.

   I would be pleased to provide Innovyze (or any interested users in the meantime) with the MSQ tables to include the effect of temperature in the MSQ solute data.

   The same tables could be used without alteration in Innovyze's InfoWater MSX sofware.

   References

   Fisher, I; Kastl, G; Sathasivan, A., (2012). A suitable model of combined effects of temperature and initial condition on chlorine bulk decay in water distribution systems. Water Research, 46(10), 3293-3303.

   Fisher, I., Kastl, G., Sathasivan, A. (2017). A comprehensive bulk chlorine decay model for simulating residuals in distribution systems. Urban Water Journal, 14(4), 361-368.

   The reactive-constituent (PSO) chlorine decay model (Fisher et al. 2017) was provided to users in the MSQ module of InfoWorks in July 2020 (see the MSQ blog for details). A major advantage of this model is that only a single set of four model coefficients is required to characterize decay rate in a given bulk water throughout a distribution system, over a wide range of initial chlorine concentration and any number/size/timing of booster doses, at a single temperature.

   Water temperature commonly differs by 20 degrees Celsius between summer and winter, causing reaction (decay) rates to differ typically by a factor… more

   2 votes

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3. IW Pro to allow for maxconc at node/hydrant
   3 votes

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4. Time varying initial water age profile

   As a user it would be great to be able to add a time varying initial water age profile for transfer nodes. This would allow us to assess water age within the distribution network without having to combine models.

   13 votes

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5. I want to be able to put be able to customize what shows up in "pipes to flush" box

   Would like to be able to use any attribute within feature class in "pipes to flush" box so that can be easier to customize and communicate with field team

   1 vote

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6. water age - representing re-chlorination station by resetting age to 0 hrs

   Depending on the size of the distribution/reticulation system water is often chlorination at the WTP and re-chlorinated at various locations within the network.

   There is no way to reset the water age value at a reservoir or node etc. to represent a re-chlorination station. This makes it difficult to get an idea of the age of water in the reticulation since passing the last re-chlorination station.

   Can this feature be added to the model?

   5 votes

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