Identifying parameter sensitivity in a water quality model of a reservoir

Huang, Yongtai; Pierson, Don
July 2012
Water Quality Research Journal of Canada (IWA Publishing);2012, Vol. 47 Issue 3/4, p451
Academic Journal
Sensitivity analysis can provide useful insights into how a model responds to the variations in its parameter values (i.e. coefficients). The results can be very helpful for model calibration, refinement and application. A one-dimensional model has been set up to simulate the hydrothermal and water quality conditions of Cannonsville Reservoir, which provides water supply for New York City. This paper aims at identifying the most influential parameters in the model through sensitivity analysis. Firstly, the Morris method (a screening method) is used to identify influential parameters. It is found that 18 parameters are important in simulations of variables that include temperature, dissolved oxygen (DO), total phosphorus (TP) and chlorophyll a (Chla). Secondly, the method is enhanced to investigate the global sensitivity of the parameters. It highlights 20 parameters that are sensitive in the simulations of the above-mentioned variables. The 18 parameters identified by the original Morris method are among the 20 parameters and the other two parameters are not very sensitive. The results show that similar results can be obtained through the original and enhanced Morris methods, although they each have their own strengths and weaknesses.


Related Articles

  • Sensitivity analysis of water quality for Delhi stretch of the River Yamuna, India. Parmar, D.; Keshari, Ashok // Environmental Monitoring & Assessment;Mar2012, Vol. 184 Issue 3, p1487 

    Simulation models are used to aid the decision makers about water pollution control and management in river systems. However, uncertainty of model parameters affects the model predictions and hence the pollution control decision. Therefore, it often is necessary to identify the model parameters...

  • Physico-chemical analysis and determination of heavy metals in drinking water of union council, Islampur, Swat. Hussain, Rahib; Hussain, Ijaz; Ali, Liaqat; Khattak, Seema A. // Journal of Himalayan Earth Science;2012, Vol. 45 Issue 2, p54 

    In Pakistan, majority of population is using ground, tube wells and spring water for drinking purposes. The contamination of these water bodies is a big challenge for safe drinking water quality due to high concentration of toxic elements. The study was conducted with objectives to assess the...

  • Sensitivity Analysis of Parameters in Water Quality Models and Water Environment Management. Dongjun Liu; Zhihong Zou // Journal of Environmental Protection;Aug2012 Supplement, Vol. 3 Issue s1, p863 

    The impacts of changes of various parameters and stochastic factors on water quality models were studied. The impact of deviation of the degradation coefficient on the model results was investigated. The degradation coefficient was decomposed into the exact part and the deviation part, and the...

  • Validation of the STRIVE model for coupling ecological processes and surface water flow. De Doncker, L.; Troch, P.; Verhoeven, R.; Buis, K.; Meire, P. // Journal of Hydroinformatics;Oct2011, Vol. 13 Issue 4, p741 

    The 1D model package STRIVE is verified for simulating the interaction between ecological processes and surface water flow. The model is general and can be adapted and further developed according to the research question. The hydraulic module, based on the Saint-Venant equations, is the core...

  • Spatial Response of Epilithic Diatom Communities to Downstream Nutrient Increases. Schuch, Marilia; Oliveira, Maria Angelica; Lobo, Eduardo A. // Water Environment Research (10614303);Jun2015, Vol. 87 Issue 6, p547 

    To monitor water quality and investigate relationships between downstream nutrient increases and diatom communities in the Pardo River Basin, Brazil, water and diatom samples were collected between 2005 and 2009. There were significant differences in diatom community composition among all river...

  • A bottom-up approach of stochastic demand allocation in a hydraulic network model: a sensitivity study of model parameters. Blokker, E. J. M.; Beverloo, H.; Vogelaar, A. J.; Vreeburg, J. H. G.; van Dijk, J. C. // Journal of Hydroinformatics;Oct2011, Vol. 13 Issue 4, p714 

    An "all pipes" hydraulic model of a drinking water distribution system was constructed with a bottom-up approach of demand allocation. This means that each individual home is represented by one demand node with its own stochastic water demand pattern. These water demand patterns were constructed...

  • Research Note: Modeling of the Water Quality of BüyUksu Stream, Bolu, Turkey. YIIdIrIm, Muhammet; Şen, Ersin; KüIköyIüoğ:u, Okan // Water Environment Research (10614303);Mar2009, Vol. 81 Issue 3, p325 

    The QUAL2E model was applied to the Büyüksu Stream, Bolu, Turkey, to predict the effect of conventional and industrial pollutant sources on stream quality. The model parameters were conditioned using data from eight sampling stations on a 24-km stretch of the stream during a steady-state...

  • The Population Dynamics of Nitrifiers in Ammonium-Rich Systems. Raszkal, Anna; Surmacz-Górska, Joanna; Żabczyński, Sebastian; Miksch, Korneliusz // Water Environment Research (10614303);Dec2011, Vol. 83 Issue 12, p2159 

    Non-optimal pH, dissolved oxygen concentration, the presence of toxic substances, or the influence of grazers are known to cause disturbances in nitrification. Because activated sludge is a mixture of different organisms, bacteria, and higher organisms, the stability of processes such as carbon...

  • Determination of Trophic State Changes with Diel Dissolved Oxygen: A Case Study in a Shallow Lake. Zhen Xu; Y. Jun Xu // Water Environment Research (10614303);Nov2015, Vol. 87 Issue 11, p1970 

    Current trophic state indices (TSI) have been reported to have limitations in assessing changes in eutrophication status of shallow waters. This study aimed to use intensive measurements on dissolved oxygen (DO) to improve the determination of tropic state changes. The authors deployed an...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics