Rainfall-runoff relationships of the Hop Brook basin, Manchester, Connecticut

The paper describes a measurement project aiming at delivering water quality data with the very fine time resolution necessary to discover deterministic elements of the complex process of pollution wash-off from an urban surface. Measurements of rainfall, runoff, turbidity, pH, conductivity and temperature with 10 sec time resolution were performed on a simple urban catchment, i.e. a single impermeable 270 m2 surface drained by one inlet. The paper presents data collection and some preliminary results.

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Modifications of rainfall runoff and decision finding models for on-line simulation in real time control

Water Science & Technology ◽

10.2166/wst.1999.0477 ◽

1999 ◽

Vol 39 (9) ◽

pp. 201-207

Author(s):

Andreas Cassar ◽

Hans-Reinhard Verworn

Keyword(s):

Real Time ◽

Urban Drainage ◽

Rain Event ◽

Rainfall Runoff ◽

Real Time Control ◽

Design Storm ◽

Time Control ◽

Timing Data ◽

On Line ◽

Rainfall Runoff Model

Most of the existing rainfall runoff models for urban drainage systems have been designed for off-line calculations. With a design storm or a historical rain event and the model system the rainfall runoff processes are simulated, the faster the better. Since very recently, hydrodynamic models have been considered to be much too slow for real time applications. However, with the computing power of today - and even more so of tomorrow - very complex and detailed models may be run on-line and in real time. While the algorithms basically remain the same as for off-line simulations, problems concerning timing, data management and inter process communication have to be identified and solved. This paper describes the upgrading of the existing hydrodynamic rainfall runoff model HYSTEM/EXTRAN and the decision finding model INTL for real time performance, their implementation on a network of UNIX stations and the experiences from running them within an urban drainage real time control project. The main focus is not on what the models do but how they are put into action and made to run smoothly embedded in all the processes necessary in operational real time control.

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Correction and preparation of continuously measured raingauge data: a standard method in North Rhine-Westphalia

Water Science & Technology ◽

10.2166/wst.1998.0458 ◽

1998 ◽

Vol 37 (11) ◽

pp. 155-162 ◽

Cited By ~ 2

Author(s):

B. Maul-Kötter ◽

Th. Einfalt

Keyword(s):

Water Balance ◽

Standard Method ◽

The State ◽

Rainfall Runoff ◽

Runoff Simulation ◽

Site Specific ◽

Free Data ◽

Important Input ◽

Raingauge Data ◽

Environmental Agency

Continuous raingauge measurements are an important input variable for detailed rainfall-runoff simulation. In North Rhine-Westphalia, more than 150 continuous raingauges are used for local hydrological design through the use of site specific rainfall runoff models. Requiring gap-free data, the State Environmental Agency developed methods to use a combination of daily measurements and neighbouring continuous measurements for filling periods of lacking data in a given raindata series. The objective of such a method is to obtain plausible data for water balance simulations. For more than 3500 station years the described methodology has been applied.

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