Morphological evolution of gravel and sand extraction pits, Tromper Wiek, Baltic Sea

Kubicki, Adam; Manso, Faustino; Diesing, Markus

doi:10.1016/j.ecss.2006.09.011

Cited by 21 publications

(13 citation statements)

References 11 publications

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“…Il est devenu pour certaines zones la principale source d'agrégats pour les besoins du béton, des travaux publics et les travaux de rechargement des plages (Cooper et al 2007a). Toutefois, l'extraction de sable en mer peut avoir des impacts néfastes sur l'environnement marin, non seulement sur le plan morpho-dynamique de la région, mais aussi sur les écosystèmes locaux, et ce n'est souvent pas limité à la zone d'excavation (Kubrick et al 2007 Par son augmentation de la température des eaux, de la turbidité et de la redéposition de particules fines (notamment celles issues de « surverse », évacuation en surface de l'eau de décantation des matériaux extraits), les paramètres écologiques sont totalement altérés et affectent directement la flore et la faune qui y vit (« le benthos ») ; La turbidité réduit notamment la pénétration de la lumière, et la photosynthèse; les particules fines peuvent recouvrir le fond et causent la mortalité des espèces qui y vivent; enfin, les organismes vivant sur et dans le fond sont aspirés et donc détruits .…”

Section: Effets De Dragage Sur La Biodiversité Du Milieu Et Ressourceunclassified

Durabilité Des Ressources Halieutiques Au Maroc : Cas De Mehdia

Motib

2020

ESJ

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The sustainability of fishery resources is a strategic axis of the development policy for the maritime fishing sector in Morocco. The rational management of these resources and its sustainable exploitation form the basis for ensuring the protection and sustainability of species for present and future generations. In view of the seriousness of the multiple pressures on the sustainability of fish stocks, and on the marine ecosystem, especially in Mehdia, the concern and national responsibility vis-à-vis the fisheries heritage challenges the public authorities in Morocco, to better manage fishery resources in this area which benefits little from the rent from its strategic location. In this article, we propose to enlighten the reader on the one hand, on the state of fishery resources in Mehdia, and on the other hand to demonstrate the role of the sustainability strategy which is conceived as a participatory and exploratory process improvement of the quality and quantity of fishery resources in the study area.

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Section: Effets De Dragage Sur La Biodiversité Du Milieu Et Ressourceunclassified

Durabilité Des Ressources Halieutiques Au Maroc : Cas De Mehdia

Motib

2020

ESJ

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“…그러나 이 연구들은 단 빔음향측심기 또는 천부탄성파 자료를 통한 2차적인 연구로 제한되었으며, 실질적인 층면구조를 파악하기 위한 기술적 한계를 가지고 있다. 그러나 최근 십여 년 동안 고정밀 위치정보 시스템과 함께 고정밀 다 중빔음향측심기술이 해저지형 연구에 많이 적용되었 다 (Knappen and Hulscher, 2002;Wienberg et al, 2004;Wienberg and Hebbln, 2005;Thornton et al, 2006;Kubicki et al, 2007;Li and King, 2007;Stockmann et al, 2009 (Flemming, 1988). (Fig.…”

Section: 서 론unclassified

Morphological Characteristics and Control Factors of Bedforms in Southern Gyeonggi Bay, Yellow Sea

Kum¹,

Shin²,

Jung³

et al. 2010

Journal of the Korean earth science society

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Morphological surveys of southern Gyeonggi Bay in the Yellow Sea were conducted for2 years (2006 and 2007) by using multibeam echosounder for investigating the morphological features of bedforms. The subaqueous dunes are shown in various shapes (A~F type) and continuous spectrum of heights and lengths of transverse-to-current dunes on the wide range of sedimentary types. The height-length power-law correlation of dunes is Hmean=0.0393L (r=0.66). The comparison between Flemming (1988)'s correlation and height-length correlation of this study indicates that the subaqueous dunes in the study area are equilibrated in the present hydrological and sedimentary environment. The major controlling factors to thedevelopment and maintenance of subaqueous dunes are both strong tidal currents and the abundant availability of sand. Marine sand mining, artificial impact, changes from the original shape to an irregular shape of the subaqueous dunes with a shorter wavelength and lower height, which has influence on the development and maintenance of bedform because it causes a decrease of the availability of sediment. Water depth and sedimentary characteristics, and othercontrolling factors seem to play limited roles in the development and maintenance of subaqueous dunes.

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“…A dragagem é uma actividade de extrema importância na defesa da orla costeira (através da alimentação de praias), na manutenção das condições necessárias à navegabilidade dos canais e na extracção de agregados para construção. A procura de sedimentos provenientes da zona costeira tem sido prática recente em muitos países, constituindo uma das principais fontes de agregados quer para a construção, quer para a alimentação de praias (Cooper et al, 2007;Kubicki et al, 2007).…”

Section: Introductionunclassified

“…A extracção de agregados ao largo apresenta, no entanto, alguns impactes negativos no ambiente marinho, quer na morfodinâmica da região, quer a nível ecológico. (Kubicki et al, 2007;Van Rijn & Walstra, 2002). A criação de uma escavação no fundo do mar afecta o campo de ondas e de correntes e, consequentemente, as taxas de transporte sedimentar (Van Rijn & Walstra, 2002).…”

Section: Introductionunclassified