Jorge Lopez Laborde

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Jorge López Laborde es Licenciado en Geología (Facultad de Humanidades y Ciencias; Universidad de la República; Uruguay) y cuenta con más de treinta años de experiencia profesional en las áreas de hidrografía, dinámica costera, geología y geotecnia (fluvial, costera y marina) y evaluación de impacto ambiental habiendo trabajado tanto para instituciones públicas (Servicio de Oceanografía, Hidrografía y Meteorología de la Armada, 1983 – 2006; Comisión Nacional del Puente Buenos Aires – Colonia, Ministerio de Transportes y Obras Públicas, 1991 – 2000) como para diversas empresas uruguayas (CSI Ingenieros SA, Grupo Empresarial ENCE, Hidrosud SA – Sociedad de Consultores, EBA Estudios Ambientales SRL, Marine Surveyors Group) y/o extranjeras (SERMAN & Asociados SA, International MarConsult Inc., Dredging International nv, Boskalis Westminster Dredging bv, Sandwell Engineering Int. Inc. y Rio Tinto Mining and Exploration Int. Inc.).
En el transcurso de dicha actividad profesional ha participado de diversos proyectos de desarrollo relacionados, fundamentalmente, a dragado, puertos y vías navegables desarrollados en Uruguay y en diversos países del continente (Argentina, Belice, Colombia, Ecuador, Honduras, Guatemala, Mexico, Paraguay y Perú) y elaborados tanto para el sector público y privado como para organismos multilaterales de crédito (PNUD, BID, BM).
Es autor y/o coautor de diversas publicaciones y presentaciones en congresos relacionadas con las áreas de su especialidad y, muy particularmente, con los problemas de la navegación en la Hidrovía Paraguay – Paraná y en la Amazonía Peruana así como con los aspectos geológicos e hidrodinámicos del Río de la Plata y su litoral costero.

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Tsegay Wolde-Georgis

Gustavo Villa Uría

Rustichelli, Maria laura

OSCAR Dolling C.

National University of San Juan

jjneiff Neiff

Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Univ. Nac. del NE, Argentina

Pablo Bereciartua

Universidad de Buenos Aires

Ance Economicas

Franklin Paredes-Trejo

UNELLEZ

Barlin Olivares

Universidad de Córdoba

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Modelación y planificación del vertido de productos de dragado mediante AUTOCAD Civil 3D

by Daniel Larnaudie and Jorge Lopez Laborde

From December, 2015 till March, 2016, CSI Ingenieros SA monitored and supervised the dredging wor... more From December, 2015 till March, 2016, CSI Ingenieros SA monitored and supervised the dredging works related to the rectification of the nautical areas corresponding to Punta Pereira Port Terminal (Colonia department, Uruguay), with special reference to work programming and operational aspects of both activities: dredging and dumping of dredge materials. Such works were conducted by Van Oord Marine Ingenuity and were made with the aid of a backhoe dredger (SIMSON, one of the largest in the world, which used a bucket of 32 m3 capacity) and two self propelled barges (CORNELIS LELY and PIETER CALAND) with 2,853 m3 of Hooper capacity each one. For project purposes, the dumping area reached a surface area of 4.35 km2; however, subsequent requests from the competent authorities implied a reduction of the same one (to 2.64 km2) and established a certain clearance depth (3.80 m PRH) which reduced the available dumping area even more (up to 0.67 km2). Although the remaining area had enough capacity (theoretically) there was no room for inefficiencies; consequently, it was necessary to perform planning and implementation of dumping activities with the greatest detail and accuracy. In early February, the dredging contractor conducted a multibeam bathymetry and submitted a report indicating capacity problems as well as the necessity to perform a large number of low volume discharges (75% of them should be less than 3,000 tons) which would imply significant extra costs. As multibeam bathymetry allowed to know – with a great detail – the morphological characteristics of the dredged material discharges, it was decided – as a way to support the dredging contractor works – to use AutoCAD ® CIVIL 3D ® as a tool for modeling and planning the remaining dredge material dumps. The methodology was developed in two stages: 1) Morphological analysis, in order to obtain a representative model of the dredged material discharges (both longitudinal and transverse to discharge direction); and 2) Dumpling simulation by volume balances based on: a) a parameterized dynamic criteria; b) automatic calculation of discharges location; and c) volume optimization (in order to ensure non exceeding the allowance depth). The result was a total of 113 possible locations for dredge material disposal capable to accommodate a higher volume than the one required; most of such discharges involved 3,000 tons or more (without the need to pay extra costs). In practice, it was not possible to perform all the scheduled discharges due to difficulties to reach the dumping site (previous dumps acted as real "obstacles to navigation"); however, the virtues of the modeling and planning tool – AutoCAD ® CIVIL 3D ® – were evident (having contributed to meet compliance with the projected dredging program). Consequently, authors recommend its application from the earliest stages of dredge material dumping works (once the information in order to morphologically characterize the dumps is available).

Jorge Lopez Laborde

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