8 public questions tagged with this topic.
Hardness EDTA method, Chlorine orthotolidine, Dissolved Oxygen Winkler method, BOD test matching.
Ref: CPCB — Water Pollution Guidelines, NCERT Biology Water Quality
Common indicator water pollution is coliform bacteria E.coli, faecal contamination indicator.
Ref: CPCB — Water Pollution Guidelines, NCERT Biology Water Quality
Turbidity due to suspended solids clay silt organic matter, scattering light, water quality parameter.
Ref: CPCB — Water Pollution Guidelines, NCERT Biology Water Quality
BOD full form Biological Oxygen Demand, oxygen required by microbes to decompose organic matter.
Ref: CPCB — Water Pollution Guidelines, NCERT Biology Water Quality
Major factor water pollution industrial waste sewage, human activities untreated effluents.
Ref: NCERT Environmental Studies, MoEFCC Environmental Guidelines
Both (a) and (b) defines nature significance; management goal-oriented, continuous, pervasive.
Ref: NCERT Business Studies Class XII Chapter 1 Nature and Significance of Management defines management functions characteristics clearly explained.
Runoff is a major pathway carrying nutrients from a lake’s surrounding watershed into the water. Rainfall or snowmelt moving over and through soil mobilizes phosphate, nitrate, ammonium, eroded sediment, manure, sewage residues, and fertilizer from farms, lawns, roads, and disturbed land. Streams and drainage systems then concentrate these materials and deliver them to the basin. Groundwater can also provide important nutrients in particular lakes, and direct atmospheric deposition or rainfall contributes nitrogen, but watershed runoff is usually the broad primary source considered in nutrient
Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 2-3
Biochemical oxygen demand, or BOD, measures how much dissolved oxygen aerobic microorganisms consume while decomposing biodegradable organic matter under standardized conditions, commonly over five days at 20°C. A high BOD therefore means that the water contains a substantial load of decomposable material or other substances supporting intense microbial respiration. Sewage, manure, food-processing waste, and organic-rich runoff are common sources. As bacteria oxidize this material, dissolved oxygen can fall, stressing or killing fish and oxygen-sensitive invertebrates and favoring organisms to
Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 2-3
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