Rehm Software GmbH

Program GraPS



With the graphic planning system GraPS one can interactively work on both drainage and water supply networks. Here, planning and inventory collection are done in the layout plans or in profiles. With GraPS, all the necessary data for hydraulic computation can be collected. The hydraulic calculation of sewer networks (HYKAS) and the hydraulic calculation of water supply network (CROSS) are graphically feasible to perform. Many functions are available for visualization of the calculation results.


A precondition for the use of GraPS is that the full version of AutoCAD R2004 or later version (recommended: R2008) or AutoCAD MAP R3 or later is required. GraPS stores its database in LISY, a MS ACCESS file.

GraPS can use a TIN/QRN (= Triangular/Quadangular Irregular Network) created from a Digital Terrain Model to determine the ground elevations of manholes and so on.

GraPS extends the AutoCAD–Menu with the addition of GraPS menu. All existing menus remain unchanged, so that along with GraPS, the menus of other existing applications (if so) also remain as usual.

Objects produced by GraPS can be created and/or deleted with the AutoCAD-Context menu (Right mouse button) . With the multi-selection in AutoCAD, selected objects can be modified with GraPS. Thus the data can be changed over globally e.g. several sewer line, manholes, pipelines etc.

For each activity (including adjustment of junction/node, pipeline, segments as well as manholes, conduits and house connections etc.) contents adjustment, formatting, color etc. along with the basic adjustments can be managed using GraPS.

Drainage Network

In the Layout plan, the manholes are positioned.Furthermore, Pipelines and catchment area as well as house connections and street gullies can be positioned. Manholes can be easily shifted. To make it easy for the most frequently used instructions, a toolbox is available. In the construction of Profile, the crossing lines, lateral inflows, House connections, street gullies as well as the water level from the hydraulic computation are represented. Interactively the bed level elevation can be changed in the profile for optimization of the process and/or the hydraulic efficiency.

GraPS modifies the database as according to the drainage system (waste, rain and combined sewerage). The drainage system can be assigned both to the manhole and the pipeline.

The manholes are represented in their actual geometrical dimensions; the shape of manhole is optional.

The manholes can be labelled as according to the current or the historical marks.

If TIN/QRN (DGM) is loaded in the project, the terrain pattern for the longitudinal design can be indicated.

With the program KANALPLOT, detailed channel profiles in the layout can be provided directly from GraPS within the drawing. Likewise, intermediate elevations are interpolated by DGM.

An existing conduit can be modified to upper or lower manhole ('Rearrangement').

Conduits can be a polygonal or curvilinear. Even the catchment area boundaries can also be curvilinear.

With GraPS, layout, topic plans etc. can be provided (Topic: Rate of utilization, Water level situation, Submerging volume, Tractive force/boundary shear, kb-value etc., Individual manhole damage, Pipeline condition, individual damaged pipeline ). For the existing topic, the condition evaluation for manholes or pipelines is done with the program KAREL .

If the change will cause a different representation of the object, the drawing will be updated. Text positions will be kept.

After the hydraulic computation or modification of the conduit data in the profile, the layout plan is updated automatically (bed elevation, diameter, Qfulll etc.).

The result of the hydraulic computation can be evaluated conduit-wise. On the screen, alternatively site layout plan or profile can be displayed with entry parameters such as max. water level, discharge as well as stage hydrograph.

Automatically, GraPS can generate the network with the polyline. With the polylines, GraPS draws the manholes & conduit for sewer network, joints & supply pipes for water supply, other lines (Gas, Electricity etc.) , extra joints and lines. The individual elements are produced and marked on the basic adjustments. Elevations are taken automatically either by survey points or from DGM.

GraPS generate a list of manholes in MS-Excel format, in which all the manholes with main point co-ordinates, elevations, angles, dimensions and material with expiration are listed. The angle of the intake is measured from the outlet in a clockwise direction.

If the program KAREL (Database for the administration of all relevant sewage system) is installed, then the data sheet of KAREL is accessed by GraPS. When an object is selected graphically, the data in KAREL is indicated or vice versa (i.e. when you select the object in KAREL datawise, then the object is zoomed graphically).

In GraPS unlimited database queries can be done and are graphically represented. For providing the database queries, if MS Access is installed, the query-generator KAREL will start. Each inquiry can be represented on its own layer with any color. Inquiries are possible both for Sewerr and water supply networks.

Water Supply Network

The water supply network consists of the objects 'Points for Segment' and 'Segment', whereby one point of segment, also called as node, is needed for the hydraulic computation. One or more segments are combined into a pipeline, which is likewise needed for the hydraulic computation. Furthermore, GraPS makes the possibility of editing water supply inspection chambers, house connections, water measuring meters. The segments can be assigned in the following ways: geometrical, structural, economical, situation wise, type wise. The points of segment can be assigned geometrically, situational and valve wise (according to fitting).

If one point of segment is specified as node, one indicates, what type of elements does it relate with. GraPS offers the possibility of specifying the following elements: fire-hydrant, valve(gate), check valve, Source Intake, Water Tower, Automatic flow controller, centrifugal pump, Piston pump, Elevated Pump, Pressure control valve, Pressure increasing and reducing valves.

The database LISY contains a coordinate table, which can be used to refer the values during the construction. The data can be read directly within the scope of GraPS with a GIF10-interface and/or from a ASCII file with arbitrary structure. If there is no TIN data and if survey points are missing, then automatic interpolation of the elevations takes place within GraPS.

Symbols for elements, nodes and fittings are available in AutoCAD as blocks, which can be inserted in any case into the program. The user can also create his/her own symbols. With respect to the representation of the layout plan between a standard representation and a shaped part plan one can differentiate. Diagram symbols for the various fittings can also be produced directly by the user.

In GraPS, the Longitudinal profile can be created and managed. All crossing lines (Water, Wastewater, Infiltration and Connecting line) are drawn in. The processing area, if available, is determined from the digital terrain model..

If the supply network which can be drawn is hydraulically computed, the pressure line is drawn into the profile (cyan color in profile of screenshot 24). In order to estimate the pressure conditions, the lines of minimum pressure (red Line) and maximum pressure (green Line) are displayed on screen.

The longitudinal profile can be used as a list for the program CROSSPLOT . They are crossing lines automatically considered as points of area break from the digital terrain model.

As a basic setting, the tool tip can be set to display the information when the mouse is over an object. This applies to the objects of the Storm and Water Supply Network.

GraPS offers the possibility of setting the topic. The water supply network is represented case-dependently in different colors (Pipelines and/or joints, friction losses, flow or operating pressures). Besides these, quantity extraction and direction of flow arrow can be displayed. To each supply-zone and each pipeline of the pipe library, the color can be assigned and can be visualised on the plan. Case dependent representations take place on different layers, so that several cases can be reproached as a topic plan within a design.

Data output

Besides the original AutoCAD and/or AutoCAD Map functions, the functions of GraPS are also accessible. For e.g., the design section can be printed in Printer or plotter.

Application limitations

Within a project, as many as desired sewer pipelines (drainage system) / Nodes (Water Supply Network) can be worked on. However, the number of conduit/segments being computed during one computation run is limited to 10,000 .

Data exchange

With GraPS, data collected are available for further analysis for the following programs (having the same database):

KAREL    Channel information system
HYKAS    Computation of Duct system
REGEN    Heavy rain series and rain model group
KANALPLOT    Drawing of Channel profiles
MENKOS    Quantity and Cost estimation
CROSS    Hydraulic calculation of water supply networks
CROSSPLOT    Longitudinal profile drawing
CROSSPLAN    Network plan drawing

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