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HM 169 Visualisation of Seepage Flows Show data sheet (pdf file) Print page
HM 169 - A product from the GUNT 2E range
Technical Description

  A descriptive method in the study of seepage and groundwater flow is the visualisation of the streamlines and their graphical representation as a flow net. The flow net provides information about the seepage of water in dams and sheet piles.
  HM 169 can be used to visualise streamlines in seepage and groundwater flow on different models using a contrast medium. Furthermore, the effects of water pressure on different structures are displayed as pressure curves.
  The trainer consists of a transparent tank with a sand filling. Various models can be placed in the sand bed to demonstrate typical structures. The experimental section is separated from the feed and discharge chambers by fine mesh screens. A valve is used to adjust the water supply. Using a contrast medium (ink) it is possible to make streamlines visible, as they occur in seepage and groundwater flow. A tempered glass viewing window allows for optimal observation of the experiments.
  Various models allow an extensive range of experiments, such as pressure distribution on bulkheads or seepage and groundwater flow under sheet piles. The "foundation" and "bulkhead" models are equipped with tubes to show the pressures on the models.
  In the experimental section there are measuring connections to detect groundwater levels. Groundwater levels are displayed on a 14-fold tube manometer.
  HM 169 contains a closed water circuit with storage tank and pump.

  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.


Learning Objectives / Experiments

- determining flow nets in permeable media

  * streamlines under a sheet pile
  * streamlines through an earth dam
  * drainage at an open dike
- determining the pressure curve at a foundation
- determining the pressure curve at a bulkhead
- groundwater levels over time in various models


* Visualisation of two-dimensional seepage and

  groundwater flows1
* Investigation of the water pressure on structures1
* Closed water circuit

Alternative products
HM 165 -- Studies in Hydrology
HM 167 -- Ground Water Flow
Seepage Flow

[1] visualisation of two-dimensional seepage flows and investigation of water pressure at various models
[2] closed water circuit
[3] ink as a contrast medium
[4] experimental section with tempered glass viewing window
[5] fine-mesh screen to separate the experimental section from the feed and discharge chamber
[6] height-adjustable overflows in the feed and discharge to adjust the water levels
[7] 14 measuring connections with filters to detect the groundwater levels in the experimental section
[8] "sheet pile" model for visualisation of streamlines
[9] "bulkhead" and "foundation" models for demonstration of the water pressure
[10] instruments: tube manometer, tubes on the "foundation" and "bulkhead" models


Technical Data

Experimental section
- usable volume: 82L
- LxWxH: 1.480x104x630mm
- max. flow rate: 4m/h
- max. head: 4m
Tube manometer, 14-fold, 0...600mmWC
Tank for ink: content 0,5L
Storage tank, stainless steel: content 96L
- "sheet pile"
- "bulkhead"
- "foundation"


Dimensions and Weight
LxWxH: 1.880x800x1.850mm
Weight: approx. 235kg
Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase; coarse sand, grain size 1...2,5mm
Scope of Delivery
1 trainer
3 models
1 bottle of ink 1L
1 set of instructional material
Order Details

070.16900  HM 169  Visualisation of Seepage


© 2005 G.U.N.T. Gerätebau GmbH