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Key words: agricultural water pollution sources: organic compounds: nitrogen phosphorus compounds. pollution erosion compounds The adverse effects of pollution caused by agricultural and urban development around Ch~sapeake Bay are discussed, particularly siltin9 of tributary rivers by eroded material and their en- richment by organic substances, nitro- gen, and phosphorus. BREHMER, M. L. et al. 1968: "The biology and chemistry of a warm water stream". Institute of Water Research, Michigan State UniverSity, East Lansing, Techni- cal Report No.MSU-IWR-TR-68-003, Red Ceder River Series: 50pp. Key words: water pollution urban drainage; sewage urbanisation; erosion: benthic fauna: dissolved nutrients; industrial wastes. sources: disposal: ammonia: oxygen: The Red Ceder River, once a productive small-mouth bass stream, is located within the recreation ar~a of metroool- itan ransing. The aesthetic and recre- ational value of this stream has been reduced as the result of urbanisation and increased agricultural use, with the resulting fast runoff, erosion, and siltation, and by the introduction of domestic and industrial pollution. This study is concerned with the ef- fects of nutrient inputs on the ecology of the stream and presents data vital to the reclamation processes. Specific emphasis is given to the ammonia nitro- gen content and the dissolved oxygen content of th~ water, and the families of benthic forms prescnt in the stream. Early observations secm to indicate lhat stream fertilisation resulting from nutrient input rcleased by the de- composition and mineralisation of the organic material in the domestic sewage increased the complexity of the stand- ing crop of the area. BRIGHAM, C. 1972: "The qualitative and quantitative analysis of urban runoff for the area of the Memorial School Red Maple swamp in Springfield, Massachu- setts". Massachusetts Water Resources Research Centre Research Report; 92pp. key words: phosphorus compounds: urban hydrology; urban [unoff~ water pollution sources; chemical analysis: nitrates: data collection: bacteria: dissolved oxygen; turbi~ity~ miscellaneous chemicals; nitrogen com- pounds; chlorides. A qualitative analysis of storm water for a thickly populated residential area within Springfield, Massachusetts is presented, along with other related data. After determining all the storm drains entering into the Red Maple Swamp a series of chemical, biological, and physical tests were performed on the incoming storm sewer flow. The chemical and physical tests performed were for temperature, pU, dissolved ox- ygen, carbon dioxioe, specific conduc- tance, turbidity, colour, silver, COpper, tannin and lignin, iron, ammo- ""'- nia, nitrogen, nitrite nitrogen, ni- trate nitrogen, orthophosphate, meta- phosphate, total hardness~ chloride, sulphate, and discharge. Th~ biologi- cal tests performed were the standard plate count and the coliform test. Chloride in storm water is mainly der- ived from the salting of roads. Chloride concentrations well after salting were r~corded as high as lSn3 ppm. Approximately 39,372 pounds per year of chloride are supplied to the Red Maple Swamp by its drain3ge basin. The total inorganic nitrogen content of the Red Maple Swamp influent was 3.64 ppm. Water with the concentration of phosphorus characteristic of that entering the Red Maple Swamp (l.~2 ~pm) is capable of initiating eutrophica- tion. , BROECKER, W.S.B. et 211. 1971: "Road salt as an urban tracer". In, Proceedings of the street salting urban water quality workshop, {ed. R.H. Hawkinsl, Syracuse University, Syracuse, N.Y.; p24-38. Key words: chlorides. water pollution sources: Road salting affects the quality of wa- ters in the suburban area northw~st of New York City. The area studied is the drainage basin of the Hackensack River. The total amount of salt add~d to the roads of Berg~n County, N.J.. in th~ winter of 1969-7~ was l5~,0~~ tons. If the roa~ salt from the 1969-7e wint~r w~re uniformly dissolved in the runoff. water for one year, the average chlo- ride ion conc~ntration would be 4~ porn. Adding the background level of about"lO ppm gives 53 ppm for the expected m~an annual chloride concentration. The chloride ion content of Oradel! Reser- voir, through which much of the drain- age from Rockland and northern Sergen County passes, was 40 ppm. BROEZE, H.G. and COUWENHOVEN, T. 1977: "Ground water withdrawal ann water control in the Netherlands. Row to increase the possibilities of explo- iting ground water by adequate water management". In, Symposium on urbani- sation and industrialisation on the hy- drological regime and on watpr quality. lABS Publication No.123: pl79-187. Key words: ground water resources: watershed management; surface runoff. In the Netherlands, the growth in the population in combination with an in- creasing degree of industrinlisation Over the oast few decades have led to a rapid increase in the extraction of ground water for domestic and industri- al supplies. As a result of the hydro- geological conditions, most of the ground water extractions cause a draw- down of the ground water table. This can influence agricultural production and the natural environment, because in most of the Netherlanr:ls the ground water table is found within 1 or 2 m of the soil surface, so that the capillary fringe r~aches the root zone. ~lso, the discharge of brooks an~ rivers can be reduced by ground water extraction. .