6. Some organisms may die and others may grow too fast. A series of grab samples, collected from different depth at a given site, reflect variations in constituents over a period of time. Suitable for: K – 5. It is even used as a habitat by many organisms. 3. in the long run and ends up in a dead pool of water. Water isn't just used locally. Swages must be treated before it is discharged into the water. The sources of oil pollution are oil spill from cargo oil tankers on the seas, losses during off-shore exploration and production of oil, and leakage from oil pipelines crossing waterways and reservoirs. The intertidal zone is the area between high and low tides; in this figure it is termed the littoral zone. Math i, FREE Historical Speech Analysis & Copywork: Pearl Harbor. aromatic chlorinated hydrocarbons, etc.) Effects of water pollution in today’s world are numberless and countless. The water pollution caused by point sources can be minimised if all domestic sewage, industrial effluents, cattle field and livestock wastewater etc. Suitable for: K – 5. Hardness is the property of water on account of which it consumes soap without forming lather freely. 25-125 ppb; D.D.T. Each year about 1,15,000 tonnes of fertilizers are washed away with agricultural waste water into the Ganga-they include 88,600 tons of N, 17,000 tons of P and 9,200 tonnes of K. The water holding capacity of the Ganga and its tributaries are getting reduced due to high rate of siltation, leading to devastating floods at regular intervals during the current century. If these substances are present in water in optimum level, they do not cause pollution. Carbonate rocks have been suggested for remedial measures: But with rise in pH as this reaction proceeds, Fe (OH)3 present in the system covers the particles of carbonate rock with a relatively impermeable layer. Inorganic nutrients (such as phosphorus) stimulate the production of organic detritus, adding to the BOD. (80-350 mg/I), sulphide (1.5-15 ppm), Hg (0.01-0.05 ppm) which are deposited in the river bed. (c) Reclaimed waste water can be used for irrigation or municipal purposes. Stimulate bacterial multiplication which would reduce the amount of nutrients solubilized in water and check profuse algal growth. Paris green (Copper acetoarsenite) was extensively applied to pools in the tropics for controlling malaria transmitting mosquitoes. SCSN (CH3)2; Organometailic group e.g. Growth of algae, micro-organisms, hydrogen sulphide and ammonia give an obnoxious odour to water making if unfit for use. Project Report # 9. Besides direct consumption (washing, bathing, drinking) man uses water for a multitude of purposes like irrigation, industry, navigation, recreation, construction work, power generation and waste disposal. Heavy metal ions, if present, will be precipitated as metal sulphides which settle at the sediment layer at the bottom. Earth moving construction projects, deforestation and flood result in the production of silt in streams and lakes. Effects on Different Parameters 9. The unpleasant taste and odour is aesthetically unacceptable even though it may not pose any serious threat to health. 8-9; B .O.D. The treated waste water can be reused for several purposes, for instance: (a) Treated water can be reused for recreation purposes like fishing and boating. If pH is more than 7 (i.e. Oil Spills Some of the most famous incidents of water pollution have been oil spills. In this case, the pollutants scattered on the ground ultimately reach the water sources and cause water pollution, for i-instance, agriculture (pesticides, fertilisers), mining, construction etc. In general, it is more significant to analyse a large number of separate samples taken at different times and different locations. The project also brings the pond facility up to design and safety standards. The Ganga basin in the home of about 37% of the total population of the country. BOD values of raw sewage varies between 200 and 400 mg/1. Water pollution can come from a variety of sources. Sarah is a wife, daughter of the King and Mama to 4 children (one who is a homeschool graduate)! First, by statute, many agricultural operations are explicitly excludedfrom regulation. Effects on Different Parameters 9. The river Damodar originates from Chhotanagpur plateau in Bihar, crosses about 500 km through Bihar and W. Bengal and joins the Hooghly river opposite Falta at a distance of 58 km. Over time, the contaminants become a part of the food chain and reach humans. 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