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Your partner in all matters of urban drainage

30 years of sound engineering expertise for scientific and practical issues

Your partner in all matters of urban drainage

30 years of sound engineering expertise for scientific and practical issues

Core competence

By combining well-founded engineering expertise with modern software solutions, we create practice-oriented and scientific studies in various subject areas for you.

Consulting & Planning

By combining well-founded engineering expertise with modern software solutions, we create practice-oriented and scientific studies in various subject areas for you.

Company

For 30 years, the itwh GmbH stands for innovative software products as well as competent advice and planning in the field of urban water management.

Software

Since the founding of itwh, software development and the related course series have been an important part of our work.

Custom software solutions

In addition to its own product range, itwh also develops customer-specific software solutions.

Software

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Since the founding of itwh, software development and the related course series have been an important part of our work.

HYSTEM-EXTRAN

HYSTEM-EXTRAN is the classic option for hydro-dynamic simulation of sewer systems: in the complete re-visited version 7 (among others) this expands for simulating pollutant loads coming from the surface. Use HYSTEM-EXTRAN 7 for proving hydraulic efficiency, for example for master plans, as well as for new planning and replanning of sewer networks.
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KOSIM

KOSIM is a well-established and state-of-the-art rainfall-runoff model for continuous quantity and quality simulations on Windows platforms. KOSIM will be available in Chinese.
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GIPS/GIPS-Light

GIPS is a Windows-based, easy-to-use graphical planning and information system for urban sewer systems. It is integrated into the leading CAD tool AutoCAD® and offers the design, analysis and inventory treatment of canalisation systems on your PC.
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FOG

With FOG you will get a comprehensive GIS-based information- and planning system, which operates within urban drainage (with HYSTEM-EXTRAN) and urban flood management (with FOG 2D). As an extension for the geographic information system ArcGIS (ESRI), FOG meets all requirements for an efficient urban drainage planning. FOG 7 is also availabe in Chinese language.
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KOSTRA-DWD 2010R

KOSTRA-DWD 2000 is currently only available in German. KOSTRA-DWD 2010R: KOordinierte STarkniederschlags-Regionalisierungs-Auswertungen KOSTRA-DWD 2010R enthält die Starkniederschlagshöhen und -spenden nach den Vorgaben des Deutschen Wetterdienstes. KOSTRA-DWD 2010R bietet einen umfassenden, komfortablen und effizienten Zugriff auf alle Daten und Zwischenwerte.
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Service overview

ITWH is committed to develop customized solutions for our clients by working target oriented and with great determination. Due to the combination of advanced software development and the vast experience in the field of engineering services, we are able to perform in various fields of urban drainage engineering and stormwater management. Examples of our capabilities include:

Radarregendaten

Principle and Added Value of Radar Data in Urban Drainage and Water Management

Radar data provide precipitation information in high temporal and spatial resolution.

Regenwasserableitung von Oberflächen

Surface discharge of stormwater and stormwater drainage

Because of frequent inundations, the analysis of potential flood impacts is gaining more and more of importance. 

Abwasserableitung im Kanalnetz

Wastewater collection in sewer systems

The hydraulic dimensioning of a sewer system is indispensable for an efficient urban and private drainage. 

Optimierung von Reinigungsprozessen

Optimization of wastewater treatment processes

Wastewater treatment plants are common practice in Germany.

Gewässergüte

Surface water quality

The demand for clean water as a resource is increasing. For this reason the EU Water Framework Directive strives for improvement of the ecological and chemical condition of all waters.

Hochwasserschutz

Flood protection

Floods are natural phenomena in the hydrological cycle. As we cannot avoid floods the goal is to limit their impacts in urban areas.

Integrale, systemübergreifende Ansätze

Integral holistic approaches

Often, three main working areas are identified in the urban water management. First the sewer system, second the wastewater treatment plant and third the water body.

Additional Services

Forschung und Entwicklung

Research & Development

Since the itwh GmbH was founded, strong efforts were made to interlink research and application of state of the art engineering.

Projektsteuerung und Beratung

Project control & consulting

By introducing working guidelines for sewer system rehabiliationage the public building authorities presented an extensive amount of guidelines concerning the quality assurance of sewage technology.

Objektplanung

Object planning

All work stages from section 3 as well as from section 4 (according to HOAI, German fee regulations for architects and engineers) can be covered by the itwh GmbH in the fiels of civil engineering works, cover construction management and the coordination of health and safety.

Software-Dienstleistungen

Software services

Besides our own software we also offer customer-specific solutions for a variety of applications.