By analysis of published papers on the Yangtze estuary and hydrological and sediments data in Yangshan Harbor area, many similarities
are found between Yangshan Harbor area and the Yangtze estuary. These similarities include the phenomenon of stagnating flow
areas, the distributive characteristics of the highest suspended sediment concentration areas, superficial sediments and shoal
bars. The stagnating flow area is the major similarity which causes other similarities. These similarities indicate that:
1) Turbidity Maximum and mouth bars in estuaries are mainly caused by the hydraulic balance of stagnating flow areas of estuaries;
2) The stagnating sand area of sands caused by stagnating flow area often locates on the narrower side of the stagnating flow
area; 3) The location (or shape) of fine sediments area caused by stagnating flow area reflects the location (or shape) of
the stagnating flow area. Both Yangshan Harbor area and the Yangtze estuary are the important developmental areas in the future
(man-made similarity). In-depth studies on these similarities between Yangshan Harbor area and the Yangtze estuary will have
momentous theoretical and practical significance. 相似文献
This work presents the results of a combined study on the beach morphology and the evolution at short- and medium-term of
the littoral between Ceuta and Cabo Negro (Morocco). It is an interesting sector showing a great increase of human occupation
and coastal structures. The monitoring program allowed for the reconstruction of the beach morphological behavior and the
seasonal changes. The studied beaches presented reflective profiles recording little seasonality, with the most notable morphological
changes being strictly related to storms. Surf Similarity and Surf Scaling parameters highlighted the existence of intermediate
and reflective beach states, characterized by plunging breakers. Aerial photographs and a satellite image have been geo-referenced
and elaborated with GIS tools to reconstruct the short- and medium-term evolution of the littoral and the sediment transport
pathways. The littoral showed important erosion at short- and medium-term related to a negative sedimentary budget because
of offshore transport. Sand accumulation was recorded close to the main ports, i.e., Marina Smir and Marina Kabila. These
port structures constituted impermeable, fixed limits, which divided the studied area into littoral cells. Other free, transit
limits were also observed. 相似文献
The 1998 project ECOPORT, “Towards A Sustainable Transport Network”, developed by the Valencia Port Authority (VPA), established the bases for implementing an Environmental Management System (EMS) in industrial harbours. The use of data and information shall always be required to develop an efficient EMS. The objective of the present research (INDAPORT) study is to propose a system of sustainable environmental management indicators to be used by any port authorities. All activities performed within a port area are analysed for any potential environmental impacts and risks.
An environmental analysis of port activities has been carried out with the objective of designing the indicators system. Twenty-one corresponding activities have been identified for large industrial ports. Subsequently, the same methodology developed to date will be later applied to other Spanish and European ports. The study has been developed by using an original system and a methodology, which simultaneously use stage diagrams and systemic models (material and energy flow charts). Multi-criteria analysis techniques were used to evaluate potential impacts (identification of factors and evaluation of impacts). 相似文献
The aim of this paper is to evaluate the results of a survey of the availability and uptake of port reception facilities within the North Sea area. The evaluation is based primarily on original survey data from the autumn of 2002 which followed on from a similar survey conducted in the summer of 2000. The EU Directive on port reception facilities for ship-generated waste etc. (Directive 2000/59/EC) was due to enter into force in December 2002, and required all EU ports to provide reception facilities to meet the needs of the vessels normally calling in at them. This paper examines the readiness of North Sea ports to meet that requirement and also considers the actual uptake levels of facilities, where ports were able to provide such information. 相似文献