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. Th~sc effects can only be partly com- pensated by the supply and cons~rvation of surface water. As 3 conseou~nc~ the issue of licenses for ground water ex- traction is at present limited. The use of surface water for th~ production of drinking water is still ~ v~ry ex- pensive alternative. compared with the use of ground water. Therefore the re- lationship between ground water and surface water has been studied in ord~r to find ways for the optimal management of th~ hydrological system. In agri- cultural and municipal areas measures are taken to prevent damage caused by P.XCCSS. water in rainy periods. 1t is a plaUSIble theory that th~se measures can ~artly remain in obeyance when the ground water level is lowered by ground water extraction. Further, the ~xist- ing system of ditches in agricultural areas can be used for agricultural water supply as well as to replenish the ground water. In both cases a syn- thesis between the objectives of the interosted parties is pursued on behalf of optimal water management. , BROMSSEN, U.VON. 1977: examples of the ishment of ground urban areas.. p1~1-103. "Urban hydrology: reduction and re9len- water formations in Striae, Vol.4: Key words: ground water resources: storm runoff. Deals with examples of ground w~ter flow due to drainage in soils ~nd rock and th~ possibilities of r~storing ground water recharge in urban ar~~s ~y storing storm water in underground voids. , BROIffl, J.~v. methods gineers g i neer Misc. sippi: et al. 1974: .Models and applicable to Corps of En- urban studies". U.s. ~rmy En- Waterways Experiment Station Paper H-74-8, Vicksburg, ~issis- 420pp. (NTIS ^0-786 516). Key words: model studies: mathematical models: computer models; watershed management; urban drainage: water pollution control: flood routing: solid wastes: air pollution effects. , This report is basically a source book for individuals who are actu~lly con- cerned with the problem of constructing alternative plans for developing urban areas. It reviews the methods ?ncl com- puter models that are currently avail- able to the planner or engineer for de- veloping wuter and relate~ land re- sources. These revi~ws discuss the availability and usefulness of several models; give a brief technical des- cription of e~ch ~odel, including the input data required; and indic~te the amount and type of computer hardware needed to use each model. The report is directed mainly toward water related problems. Thus, most of the methods discussed deal with urban drain~ge, waste water man~gement, flood routing, reservoir operation, w3ter supply, flood zoning, and the social and eco- nomic aspects associated with these areas. Recreation, air pollution, and solid waste disposul arc discuss~d only briefly. Other import~nt urb~n prob- lems such as trans90rtation, energy, cultural im9rovcment, and nois~ abat~- ment were not considered in this study. BRO\fN, R. J. and I.EHMANN, E. J. 1975: .Urban storm sewer an'1 water runoff. vol.l, 1964-1973 (a bibliogra- phy with abstracts). Report for 1964-1973". u.s. NTIS, Springfield, Va. : 182pp. Key words: urban runoff: bibliograohies: abstracts; combinNl sewers; mod~l studies; storm runoff; flood control: urban hydrology. Urb~n storm runoff problems and abate- ment, combined and storm sew~rz, ~n~ urban hydroloqy und its modeling are covered in the bibliography. BRONNING, J.A. 1972: .~an's effect on th~ quality of our water.. In depth re- port, West Palm B~ach, Vol.l{2); nl-3. K~y words: water pollution: urb~n ru- noff; rainfall-runoff relatio~shi9S; storm runoff: water pollution control: bacterin; wast~ w~ter dispos~l; agricultural pollution. Backgrounc material is oresent~n on pollution ~s it occurs through B9ricul- tural, urban, an0 storm runoff. South Flori~c's forec?st is ~ncour~gin~ in that the Florida Department of POllu- tion Control has successfully reauir~~ non-polluting waste disoosal. On~ r~- maining problem is that urban runoff bacteria l~vels in str~et gutters 3r~ extremely high. The optimum solution will be to eliminate much of the tr~!h and debris which finds their way into the waterbodi~s during rainstorms. Agricultural pollution runoff c~n be controlled through the use of private, small reservoirs. Tables are given which show characteristics of storm water and pollutant levels according to land use type. BROWNLE~, R.C. et al. 197~: .Variations of urban runoff with duration c~d in- tensity of storms". Texas Technical University, lubbock, Water Resourc~s Centre, Inteci~ Report, WRC-7P.-3 W71-01546, rn'RR-B-064-TEX(1), 77pp. Key wares: urban runoff: sewage tre- atment: storm cunoff; combin~~ sewers: dissolved solids: nitrates: biochemical oxygen demand. A great many cities tc~nsport raw domestic sewage to treatment facilitie~ in the same sewer system used to carry storm runoff from their stre~ts. The storm runoff carried by th~se combined sewers, durina even moderate rain- storms, CDn gre;tly ~xcc~d the capecity of municipal spwag~ treatment pl~nts. This study w~s u~dertuken to determine the concentrations of pollutants car- ried by the storm runoff from a small residential watershed, and to consider the variations of pollutant concentra- tions with the duration of runoff.