Development and modifications of mathematical models for Dissolved Oxygen (DO) are reviewed in this paper. The field and laboratory methods to estimate the kinetics of Carbonaceous Biochemical Oxygen Demand (CBOD) and Nitrogenous Biochemical Oxygen Demand (NBOD) are also presented. This review also includes recent approaches of BOD and DO modeling beside the conventional ones alongwith their ap...

Nocardioforms were genetically identified using PCR-REBA. PCR-REBA was able to identify many bacterial genera in one assay. PCR-REBA was able to determine that foams from different WWTPs contain various types of bacteria such as Gordonia spp., Millisia spp., Skermania spp., Tsukamurella spp., and Microthrix parvicella, while light microscopy cannot differentiate amongst them (except M. parvicel...

The effect of agricultural practices on water quality Old Woman Creek (OWC) watershed was evaluated in a hydrological model using the Parameter-elevation Regressions Independent Slopes Model (PRISM) climate data and 20 different global circulation models (GCMs) from Coupled Intercomparison Project Phase 5 (CMIP5). A set up Soil Water Assessment Tool (SWAT), while calibration done Multi-Objectiv...

Waste management studies are usually done using calibrated and verified water quality models. Ravi River located in Lahore, Pakistan is receiving untreated wastewater from number of outfalls and surface drains and thus model calibration and verification are done using the data under the prevailing conditions. The water quality objectives can only be met with wastewater treatment wherein the mod...

The separate and synergistic effects of land use climate change on water quality variables in Old Woman Creek (OWC) watershed were evaluated using a hydrological model set up Soil Water Assessment Tool (SWAT) for the OWC watershed. Model calibration was done multi-objective evolutionary algorithm pareto optimization. Parameter-Elevation Regressions Independent Slopes (PRISM) data 20 different G...

amir kabir dam was built in varian strait, at 23 km north of karaj in 1961. the dam is multipurpose and its maim aims are the spring floods control, supplying potable water for tehran city, producing electricity and providing irrigation water. different pollutants which discharge to the river finally enter to the dam reservoir. determining the pollution loads of the dam sub-catchments can help ...

many constants and coefficient effect on the modeling results. in many cases, it is possible these constants and coefficients differ from their real values in the environment, but the modeling results adapted with real boundary conditions due to other factors adjustment during modeling. uncertainty analysis is a tool for assessing the effect of uncertainty of various factors on the modeling res...