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1.
M. V. Mikhailova 《Water Resources》2008,35(2):137-155
The main hydrological and morphological features of the Columbia River mouth area, including its tidal estuary, are discussed. Close attention is given to the characteristics of large-scale hydraulic projects in the river basin as well as to dredging and channel training operations in the river mouth area and to the assessment of the impact of these operations on hydrological and morphological processes. Variations in the regime of river flow after its regulation, processes of dynamic interaction and mixing of river and sea water in the estuary are characterized. Changes of the mouth bar and sea coasts near the Columbia River mouth as a result of construction of stream-training jetties are discussed. 相似文献
2.
Hydrological and morphological processes in the Zhujiang River (Pearl River) mouth area of China are discussed. The hydrological regime of the Xijiang River, which is the largest river of South China and the main source of water inflow into the Zhujiang mouth area, is described. The basic features of the hydrological regime of the delta and the near-shore zone of the Zhujiang River mouth are characterized, much attention being given to the role of tides and mixing of river and sea water in the hydrological regime. Special emphasis is placed on morphodynamic processes at the mouth area and the history of the Zhujiang Delta evolution. 相似文献
3.
The principal features of the hydrological regime of the Seine River mouth area are discussed. Attention is focused on studying the dynamics of water and sediments in the estuary of the Seine River and in its tidal mouth area under the combined effect of seasonal variations in river runoff and tides. The history of development and improvement of the estuary is described. 相似文献
4.
The main features of the structure and water regime of the mouth area of the Senegal River and their changes caused by river regulation in its upper reaches and within its delta area are considered. Data on water and sediment runoff of the Senegal River and their variations along the river are specified. River runoff was found to dramatically decrease in recent decades because of a drought. Zoning of river mouth area was carried out, and morphological processes in its estuary, in particular, the formation of a new outlet of the river into the ocean with the formation of a lagoon, are described. 相似文献
5.
M. V. Mikhailova 《Water Resources》2010,37(2):160-171
The peculiarities of the hydrological regime of the Orinoco River and the coastal zone of the Atlantic Ocean that affect the
hydrological-morphological processes in the mouth area of the Orinoco River are considered. The major features of the delta
water regime, including its inundation, runoff distribution over the delta branches, water and sediment balance, and the processes
of river and sea water mixing are described. Special attention is paid to the morphological processes at the Orinoco mouth
(delta evolution and modern processes at its coastline). 相似文献
6.
SEDIMENT CARRYING CAPACITY OF SEA CURRENT AND THE TRAINING OF THE YELLOW RIVER MOUTH 总被引：1，自引：0，他引：1
LI Diankui 《国际泥沙研究》1999,(2)
1INTRODUCTIONTheYellowRivercarries1.6billiontonsofsedanmentload,rankedthefirstintheworld.Sedimentationinthelowerreachesresultedinfrequentlyshiftoftherivercourses.ThroughoutthehistoryofChina,theYellowRiverhasbeenassociatedwithfloodsandfamine,earningtherivername"China'ssorrow"(Hu,l996).Instabilityoftheriverchannel,especiallythedeltachannel,restraintstheeconomicdevelopmentofthearea.TheDongyingmunicipalgovernment,theShenliOilCorporationandtheYellowRiverMouthManagementBureauofYRCC(Yel… 相似文献
7.
The geographical and hydrological features of the Mekong River basin and the nearshore zone of the South China Sea, which
influence the hydrological regime of the Mekong River mouth, are discussed. Detailed characteristics are provided for the
drainage system of the Mekong River mouth area, water flow distribution among the delta branches, processes of the delta submergence
during floods, as well as propagation of tidal, surge-induced level fluctuations and seawater intrusion into the river. Regularities
of the Holocene evolution of the Mekong River mouth area and recent processes of delta formation are also discussed. 相似文献
8.
Main features of sediment regime in the mouth area of the Hong Ha River (Red River), Vietnam, are discussed. As shown, the hydraulic engineering construction on the Da tributary resulted in a nearly two-fold decrease of river sediment yield. Sediment budget components at the river mouth were analyzed to establish that more than 90% of the sediment yield was detained in the delta branches and in the nearshore zone of the river mouth. Morphological processes in the Hong Ha River mouth area were characterized in detail including delta evolution during Holocene and the dynamics of its channel network, coastline, and mouth bars. Special attention was given to modern processes of delta progradation at the mouths of main branches and to wave erosion of other parts of the delta coastline. The causes for the intensification of this kind of erosion and change of the delta type in the late XX century are discussed. 相似文献
9.
M. V. Mikhailova 《Water Resources》2011,38(3):284-297
The main regularities in the interaction of tides and storm surges at river mouths are discussed. A study of the Elbe River
mouth area is used to describe the processes of interaction of the eustatic sea level rise, tides, surges, and river flow
and special features of formation of maximum water levels. As shown, the intensification of cyclonic activity over the Northern
Atlantic in the second half of the XX century resulted in more frequent extremely high storm surges at the Elbe River mouth.
An assessment is given for possible changes in the regime of tides and surges at the Elbe River mouth in the XXI century,
which may be caused by the acceleration of the eustatic sea level rise. The impact of local hydraulic engineering works (diking,
dredging, and channel straightening) on maximum water levels within the town of Hamburg is analyzed. 相似文献
10.
Water and sediment dynamics at Saint Lawrence River mouth 总被引：1，自引：0，他引：1
The main features of the hydrological regime and morphological structure of the estuarine-type mouth area of the Saint Lawrence River are considered. Data on the structure of water masses, thermal and ice regimes in the Gulf of Saint Lawrence, which has a significant effect on the estuary, are given. The major attention is paid to water mixing processes, water and sediment dynamics in the estuary under the joint effect of river runoff and tides, and as a function of bed topography. The parameter determining the type of water stratification and circulation is discussed. The effect of the Coriolis force on the stratified flow in the estuary and formation of the geostrophic current is discussed. 相似文献
11.
New definitions, regionalization, and typification of river mouth areas and estuaries as their parts
The problems of studying river mouth areas and their parts, namely, estuaries and deltas are discussed. The step is taken to combine the concept of river mouth area and mouth processes developed in our country with the concept for estuary and estuarine processes widely spread among foreign scientists. In this connection, the article offers new definitions of a river mouth area and estuary as well as new schemes of regionalization of river mouth areas and typification of estuaries. The types of river mouth areas and estuaries are illustrated by case studies. 相似文献
12.
ONE D AND TWO D COMBINED MODEL FOR ESTUARY SEDIMENTATION 总被引：3，自引：0，他引：3
ZHANG Shiqi 《国际泥沙研究》1999,(1)
１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｆｌｕｖｉａｌｐｒｏｃｅｓｉｎａｎｅｓｔｕａｒｙｉｓｃｏｍｐｌｉｃａｔｅｄｕｎｄｅｒｔｈｅａｃｔｉｏｎｏｆｒｕｎｏｆ,ｔｉｄａｌｆｌｏｗ,ｗｉｎｄｉｎｄｕｃｅｄｃｕｒｅｎｔａｎｄｗａｖｅｅｔｃ．Ｅｓｐｅｃｉａｌｙ,... 相似文献
13.
The main regularities of hydrological and hydrological-environmental processes occurring within the complex estuary, the Chesapeake Bay and the mouths of its tributaries, are discussed. The peculiarities of the estuary morphological structure, including the structures of tidal and net currents, salinity and water turbidity fields and their variability, the environmental conditions, and their human-induced changes. Using the Chesapeake Bay as an example, it became possible to reveal the basic features of classical estuaries subject to a considerable impact of river runoff and featuring mixing of river and sea water and moderate stratification of the water mass. It is shown that the regularities of hydrological processes in the Chesapeake Bay are typical of many mouth water bodies of estuarine type (inlets, drowned river valleys, lagoons, and tidal estuaries proper). 相似文献
14.
Processes of interaction between river flow, tides, and storm surges in the Thames Estuary are discussed. The main regularities in water dynamics during tides and surges are revealed. Specific changed in characteristics of tides and surges along the estuary are established. Mention is made of the significant longterm increase in the ranges of tides and surges during the XX century. The history of floods caused by storm surges in the Thames Estuary and in the area of London is described. Hydraulic engineering measures for flood control in the area of London are discussed. 相似文献
15.
River and sea water interaction and delta formation in tidal mouth area of the Fraser River (Canada)
The history of studies and development of water resources of the Fraser River (Canada) and its mouth area is presented. The history of the Fraser River delta development and the hydrologomorphological processes that occur at this delta are discussed. Close attention is given to the analysis of processes of dynamic interaction and mixing of river and sea water under the joint impact of river flow and tidal fluctuations. 相似文献
16.
P.A. Board 《Marine pollution bulletin》1973,4(11):165-166
It is generally assumed that debris dumped in estuaries is gradually transported to the sea, where it decomposes or disintegrates. In the Thames Estuary, and perhaps in others also, there is a net landward drift of water near the bed of the river, which results in debris accumulating in the estuary and decaying there. 相似文献
17.
M. V. Mikhailova 《Water Resources》2006,33(5):523-534
Sediment balance at river mouths—a physical basis of delta dynamics—is considered. The specific features of relationships between sediment balance components at a mouth of a river are established for a stable, rising, or dropping sea level. The development of the delta of the Chilia branch at the Danube mouth is considered as an example of delta dynamics under the conditions of a relatively stable sea level. The evolution of the Sulak delta in the Caspian Sea with a highly variable level is considered as an example of delta dynamics in the case of a considerable rise and drop of water level in the water body. The anthropogenic reduction of sediment runoff of the rivers (by a factor of two in the Danube, and by a factor of nine in the Sulak) is taken into account. The relationship between the sediment runoff of a river and the volume of the “backwater prism” that formed due to sea level rise is shown to be the key factor in the development of delta in the case of sea level rise. In the case of a drop in the sea level, the relationship between the “active” and “passive” progradation of the delta into the sea is determined by the sediment runoff of the river, the rate of sea level drop, and the bed slope in the coastal area of the nearshore zone. 相似文献
18.
The peculiarities of the hydrological regime of the delta and near-shore zone of the Po River are discussed. The intrusion of salt seawater into the delta is described. The history of the Po Delta formation has been restored on the basis of the analysis of historical, archeological, and cartographic data. As shown, the peculiarities of hydrological and morphological processes in the Po River mouth are associated with natural and specifically with human-induced variations in sediment runoff of the river, with levee construction along branches, subsidence of deltaic deposits, and eustatic rise of the sea level. 相似文献
19.
Since the end of the post‐glacial sea level rise 6800 years ago, progradation of river mouths into estuaries has been a global phenomenon. The responses of upstream alluvial river reaches to this progradation have received little attention. Here, the links between river mouth progradation and Holocene valley aggradation are examined for the Macdonald and Tuross Rivers in south‐eastern Australia. Optical and radiocarbon dating of floodplain sediments indicates that since the mid‐Holocene sea level highstand 6800 years ago vertical floodplain aggradation along the two valleys has generally been consistent with the rate at which each river prograded into its estuary. This link between river mouth progradation and alluvial aggradation drove floodplain aggradation for many tens of kilometres upstream of the estuarine limits. Both rivers have abandoned their main Holocene floodplains over the last 2000 years and their channels have contracted. A regional shift to smaller floods is inferred to be responsible for this change, though a greater relative sea level fall experienced by the Macdonald River since the mid‐Holocene sea level highstand appears to have been an additional influence upon floodplain evolution in this valley. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
20.
The main features of hydrological processes taking place in the mouth area of the Hong Ha River in Vietnam are considered.
The geographic and hydrological conditions in the Hong Ha River basin and in its receiving water body—the Gulf of Tonkin,
South China Sea—are briefly characterized. The main features of the mouth area of the Hong Ha River as a specific geographic
object are identified. The hydrological regime of the delta and the nearshore zone of the Hong Ha River are described in detail.
Water balance of the delta, runoff water levels and delta inundation, water and sediment runoff distributions over delta branches,
and the effect of tides, typhoons, and storm surges on delta regime are considered. Present-day problems of the use and protection
of natural resources at the Hong Ha River mouth are briefly discussed. 相似文献