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Keeping water upstream

Keeping water upstream. M. Tilma, P.E.V. van Walsum P.J.T. van Bakel A.G.M. Hermans L.C.P.M. Stuyt. A survey of the effects of retention orifices. Constance. The model SIMGRO The study area The orifice Results Conclusion. SIMGRO. Ground water (Finite elements) Surface water

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Keeping water upstream

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  1. Keeping water upstream M. Tilma, P.E.V. van Walsum P.J.T. van Bakel A.G.M. Hermans L.C.P.M. Stuyt A survey of the effects of retention orifices.

  2. Constance • The model SIMGRO • The study area • The orifice • Results • Conclusion

  3. SIMGRO • Ground water (Finite elements) • Surface water • Irrigation • Land cover • Drainage

  4. The Beerze and Reuzel Sandy area on the border between the Netherlands and Belgium which is distinct for a Dutch sandy area.

  5. The Orifice in practise h Q

  6. The orifice The Dam The orifice in the model

  7. Placement of the orifices

  8. Evaluation

  9. Discharge reduction

  10. When it goes wrong!

  11. The effect of the orifice size on the discharge

  12. Effect of the size of the dam on the discharge

  13. Conclusion • Reduction of the peek flow can be obtained • Increase in water table height is a possible side effect • For extreme peeks an increase in peek discharge is possible • Careful planning is necessary

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