<br />as part of the storm water management
<br />system. Maximum use should b~ ma~~ of
<br />natural drainage. The installation of
<br />stocm water inl~ts should be delayed as
<br />long as possible because as soon as the
<br />runoff enters the pipe system it is
<br />carried rapidly downstream and may pOSe
<br />flood hazards in the lower part of the
<br />drainage basin.
<br />
<br />ANON.
<br />
<br />1977: "Effects
<br />industrialisation
<br />regime and on
<br />Proceedings of the
<br />October 1977, IAHS
<br />572pp.
<br />
<br />of urbanisation and
<br />on the hydrological
<br />water quality".
<br />Amsterdam Symposium,
<br />Publication No.123:
<br />
<br />Key words:
<br />drology;
<br />cbang~.
<br />
<br />urbanisation;
<br />water pollution;
<br />
<br />urban hy-
<br />landuse
<br />
<br />The voluroe conte ins 63 papers, submit-
<br />ted for the 9lenary sessions of the
<br />symposium, referring to the following
<br />themes: el) the effects of urbanisa-
<br />tion and industrialisation on the hy-
<br />drological regime: (2) the effects of
<br />urbanisation and industrialisation on
<br />water quality; and ()) water policy as
<br />a factor in urbanisation and industri-
<br />alisation. Papers are abst(acted sep-
<br />arately.
<br />
<br />APMANN, R.P. 1974: "The- influence of ur-
<br />banisation on stream channel beh8vi-
<br />our-. In, Proceedings National Sympo-
<br />sium on urban rainfall and runoff and
<br />sediment control, University of Ken-
<br />tucky, Lexington, Ky: pl83-166.
<br />
<br />Key words:
<br />erosion;
<br />channels:
<br />rates.
<br />
<br />urbanisation~ streamflow;
<br />channel erosion: alluvial
<br />bank erosion; erosion
<br />
<br />A method was proposed for evaluating
<br />the impact of urban development on
<br />stream channel behavior. The method
<br />was based on equations relating the hy-
<br />draulic geometry to mean flow dis-
<br />charges. Urban development can result
<br />in stream channel enlargement in af-
<br />fected watersheds with consequent pro-
<br />duction of sedi~ents from the channel.
<br />If development proceeds for a long
<br />time, channel instability may be a con-
<br />tinuing problem. In the first approxi-
<br />mation, the rate of channel sediment
<br />production and the ultimate channel
<br />812e can be evaluated from equations
<br />derived from the hydraulic geometry re-
<br />lations for a stream, As an example, a
<br />channel in a watersned changing from
<br />natural conditions to an urbanised area
<br />having 30 percent impervious area would
<br />enlarge by a factor of about 2.8 times
<br />in the process. Another example indi-
<br />cated that the steady d~velopment of
<br />the Cy Cuyahoga River Basin, Ohio, is
<br />responsible for a sediment production
<br />of about 40,000 tons/year from the
<br />channel between Old Portage and Inde-
<br />pendence, a distance of 31 miles.
<br />
<br />AllAI, A. et a1. 1977: .orban flood water
<br />management systems in semi-arid
<br />regions: model extension, design and
<br />applications-. Arizona Wate~ Resources
<br />Research Centre, Tucson. Completion
<br />
<br />:;"
<br />
<br />Report, OWRT A-049-ARIZ (1);
<br />(NTIS PB-277 485).
<br />
<br />63?p.
<br />
<br />Key words: model studies: u~ban ru-
<br />noff; r~infall-runoff relQtionships:
<br />urban drainage: watersh~d management.
<br />
<br />A non-linear res~rvoir model is used to
<br />present the r~infall-runoff reletion-
<br />ships for thunderstorms on the urban
<br />watersheds of Tucson, Arizona. Two
<br />types of computer programs are devel-
<br />oped: a calibration program to obtain
<br />a best-fit calculate~ hydroqraph: and
<br />a verification 9rogram to g~nerate
<br />storm hydroqraphs given the wat~rsh~d
<br />characteristics and 1'l hYEi-"tograph.
<br />Calibration reveals the relation~hip of
<br />the model parameters, namely, (f) the
<br />inflow coefficient, (a) the const~nt
<br />coefficient, and (TL) the time l;:lq, to
<br />the" total rainfall, drainage ~rea,
<br />channel length, and infiltration ca~a-
<br />city of the watersh~d. The av~rage
<br />discrepancy between the pre~ict~d hy-
<br />drograph and the actual hydrogrann for
<br />Tucson urban watersheds is 20-25 per-
<br />cent.
<br />
<br />.
<br />
<br />.
<br />
<br />ARGOE, J.R. 1916) "An 'environmental' ap-
<br />proach to siorm water manag~m~nt in th~
<br />Adelaide Hills (^ustralia)-. In, Hy-
<br />drology Sy~posium, Sydney, NZIE Austra-
<br />lia Prepri~ts of p3gers; pl~8-ll2.
<br />
<br />Key words:" urban dr?inage: storm ru-
<br />noff: u~banisation: landuse chang~;
<br />channel e~sion; erosion: floo~ con-
<br />trol.
<br />
<br />The establishment of urban subdivisions
<br />creates increased flooding 5nd erosion
<br />of natural channels downstrp.am: this
<br />problem is solved, convention~lly, by
<br />straighteni~Q, wid~ning or lininq such
<br />channels. A less costly and mor~ envi-
<br />ronmentally ~cceptable solution is to
<br />control runoff within subdivisions so
<br />that peak ou~flowing discnarg~s diff?r
<br />little from those prior to development.
<br />This approach, usinq retention basins
<br />for tempo~ary storage of stor~ water,
<br />is examined for the case of urban sub-
<br />divisions in the A.delaide Hills. The
<br />study presents technical information
<br />which simplifies the joint tasks of
<br />site selection and preliminary design
<br />of the retention basins.
<br />
<br />>
<br />
<br />P.RNETT, R. et.al. 1973: -Diurnal flow and
<br />quality patterns in a combined sewerage
<br />system". Pacific Northwest Lab., Bat-
<br />telle Memorial Inst., Richland, Wash.
<br />Paper presented at 46th A.nnual Confer-
<br />ence., Water POllution Control Federa-
<br />tion, (Oct. 1973).
<br />
<br />Key words: combined sewers: urban ru-
<br />noff; water pollution.
<br />
<br />,
<br />
<br />^RON, G. et al. 1976; "Quantitative and
<br />qualitative implications of urban storm
<br />runoff abatement measures".
<br />Pennsylvania State University, Univer-
<br />sity Park, Pa. Institute for Research
<br />on Land and Water Resources, Research
<br />Publication No.97: l0lpp.
<br />
<br />.
<br />
<br />Key words: computer models: storm ru-
<br />
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