Deltares: Spotlight on Guayaquil Flood Issues

Guayaquil, a city situated on the Guayas River and the most important port in Ecuador, has often suffered flooding due to its location and urban growth.

With a tidal range of 3.5 meters and severe squalls, water management of the city is one of the authorities’ biggest worries.

Sedimentation in the Guayas River is considered the culprit. It leads to higher water levels and hinders the drainage of water and the passage of ships.

As a result, an island has formed in the middle of the river. Increasing numbers of birds on the so-called Islote del Palmar form a danger for the nearby airport.

It also causes the river banks of the Samborondón neighborhood to erode faster.

Originally, people in Guayaquil assumed that deforestation upstream was the primary cause of the increased sedimentation.

Before implementing effective measures, it was decided to carry out a broader analysis first using the new program Delft3D Flexible Mesh from Deltares. It revealed that the cause of the increased sedimentation did not lie upstream, but rather downstream in the estuary.

This was confirmed when primarily sea sand rather than river sand was dredged up.

The presence of sea sand in the river can be explained by the asymmetry of the tide, amplified by earlier land reclamation, and by upstream dams reducing the washing-out of the river. The upstream deforestation did have some effect as well.

In calm waters, silt and clay (fine material) was found.

The authorities now want to determine what measures to take using the Delft3D Flexible Mesh.

Deltares staff are giving a training course for this purpose in Guayaquil. This is done in collaboration with the Spanish consultant Intecsa-Inarsa.

The total project is commissioned by EMAPAG (Guayaquil water company) and CAF (financier).

The problems and possible solutions for Guayaquil were also discussed during the Habitat III conference in Quito, Ecuador, during a public session in the Netherlands pavilion.

 

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3rd International Congress Hydraulic Engineering Structures and Dredging

Russia’s leading maritime industry Media Group PortNews (www.portnews.ru) holds a traditional annual Congress “Hydraulic Engineering Structures and Dredging” in Moscow. 

The two-day Congress includes the 7th International Forum of Dredging Companies and the 3rd Technical Conference “Modern Solutions for Hydraulic Engineering”.

Infrastructure development is among the real sources of Russia’s economy growth. Construction of port facilities and new hydraulic engineering structures on the country’s inland waterways constitute an essential part of all infrastructure projects. It is important to take into account the best international practices to implement these projects effectively.

The program of the Congress will be devoted to the latest technologies for dredging and hydraulic engineering works. Speakers and delegates will refer to real projects to discuss specifics features of dredging works, as well as dedicated fleet and equipment involved.

To learn more about event, please, contact the organizing committee: snitko@portnews.ru

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