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  • 1
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    The role of physical processes in mangrove environments : manual for the preservation and utilization of mangrove ecosystems (2007)
    Tokyo : TERRAPUB
    Details
    Keywords: mangrove systems ; physical processes ; mangrove physics ; tidal flow ; mangrove vegetation ; mangrove swamps ; sea waves and tsunamis ; formation of water properties ; material exchange ; sediment transport ; groundwater flow ; formation of soil properties
    Description / Table of Contents: Part I: Outline of the physical processes within mangrove systems --- Chapter 1: Introduction --- Chapter 2: Present state of mangrove studies from a physical viewpoint --- Chapter 3: Physical factors that shape mangrove environments --- Chapter 4: Hydrodynamics and physics that support the mangrove environment --- Chapter 5: Feedback processes that maintain the mangrove environment --- Chapter 6: Research technology --- Chapter 7: Modeling of mangrove systems --- Chapter 8: Future studies in the context of the preservation and utilization of mangroves
    Pages: Online-Ressource (XX, 598 Seiten)
    URL: http://www.terrapub.co.jp/e-library/matsuda/
    Language: English
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    E-BOOK
  • 2
    Electronic Resource
    Electronic Resource
    Mangroves as a coastal protection from waves in the Tong King delta, Vietnam (1997)
    Springer
    Mangroves and salt marshes 1 (1997), S. 127-135 
    Details
    ISSN: 1572-977X
    Keywords: mangroves ; reforestation ; wave reduction ; flow resistance ; Tong King delta ; coastal protection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The wave reduction (wave period; 5–8 sec.) was investigated in amangrove reforestation area (Kandelia candel) close toaquaculture ponds in the Tong King delta, Vietnam. On one site where only young mangrove trees grew, the wavereduction due to the drag force on the trees was hardlyeffective. On the other site where mangrove trees weresufficiently tall, the rate of wave reduction per 100 m was aslarge as 20%. Due to the high density of vegetation distributedthroughout the whole water depth, the effect of wave reductionwas large even when the water depth increased. These resultsdemonstrate the usefulness of mangrove reforestation for coastalprotection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009928003700
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  • 3
    Electronic Resource
    Electronic Resource
    Drag force due to vegetation in mangrove swamps (1997)
    Springer
    Mangroves and salt marshes 1 (1997), S. 193-199 
    Details
    ISSN: 1572-977X
    Keywords: mangrove swamp ; drag coefficient ; flow resistance ; tidal flow ; vegetation density ; Reynolds number
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Field studies of tidal flows in largely pristine mangrove swamps suggestthat the momentum equation simplifies to a balance between the water surfaceslope and the drag force. The controlling parameter is the vegetation lengthscale LE, which is a function of the projected area ofmangrove vegetation and the volume of the vegetation. The value ofLE varies greatly with mangrove species and water depth. It isfound that the drag coefficient is related to the Reynolds number Re definedusing LE. The drag coefficient decreases with increasingvalues of Re from a maximum value of 10 at low value of Re (〈104), and converges towards 0.4 for Re 〈 5 ×104.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009949411068
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  • 4
    Electronic Resource
    Electronic Resource
    Dependence of dispersion on vegetation density in a tidal creek‐mangrove swamp system (1999)
    Springer
    Mangroves and salt marshes 3 (1999), S. 59-66 
    Details
    ISSN: 1572-977X
    Keywords: dispersion ; mangrove swamp ; secondary circulation ; tidal creek ; tidal trapping ; vegetation density
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The dependence of dispersion in a tidal creek on the vegetation density in a fringing mangrove swamp is discussed through a numerical model. A secondary circulation prevails everywhere in the tidal creek‐mangrove swamp system and is generated by the overflow into the swamp at every high tide. As a result, dissolved and suspended matter moving with the circulation is trapped in the swamp for a fraction of the tidal cycle; it flows out of the swamp at ebb tide and disperses in the creek. The relation between the dispersion coefficient and the mangrove vegetation density is shown to be non‐linear. Dispersion is large both for bare and high vegetation densities and minimum for intermediate vegetation density. The ecological and management applications may be profound as our study suggests that such systems may be unstable and cannot naturally recover from excessive anthropogenic disturbances.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009929921740
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  • 5
    Electronic Resource
    Electronic Resource
    Tidal asymmetry in mangrove creeks (1995)
    Springer
    Hydrobiologia 295 (1995), S. 51-58 
    Details
    ISSN: 1573-5117
    Keywords: hydrodynamics ; mangrove swamp ; tidal creek ; tidal asymmetry ; drag force ; flood plain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We model the dynamics of a tidal creek — mangrove swamp system. In the creek, a tidal asymmetry prevails. The ebb flow dominance at spring tides helps flush out the coarse sediment from the creek. Results from the numerical model suggest that the ebb dominance is due to friction in the mangrove forest and in turn this is controlled by the density of the vegetation. The tidal asymmetry of the current is negligible for a very small or a very large vegetation density, and is maximum for an intermediate vegetation density typical of that in undisturbed healthy mangroves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00029110
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  • 6
    Electronic Resource
    Electronic Resource
    Water exchange in Kabira Cove, Ishigaki Island (1983)
    Springer
    Journal of oceanography 39 (1983), S. 63-72 
    Details
    ISSN: 1573-868X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The mechanism and rate of water exchange were investigated in Kabira Cove, Ishigaki Island, in the southernmost part of Japanese islands, near Taiwan. During observations in the summers of 1976 and 1977, a larger proportion of the salt transport into the bay was derived from the so-called “tidal trapping effect”. In the latter period of observation carried out after heavy rain brought by a seasonal typhoon under annual mean tidal conditions, the turnover time, i.e. the scale of replacement of the whole bay water with the open sea water, is estimated to be 3.6 days. Based on these observational results, a concept of the tidal trapping due to coupling of the actions of tides and buoyancy in a vertical two-dimensional field with a sill at the bay mouth is proposed. Considering the topographical, hydrometeorological and geographical conditions of the cove, it is inferred that this water exchange process tends to be formed in Kabira Cove in summer except during neap tides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02210760
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  • 7
    Electronic Resource
    Electronic Resource
    Water exchange and material exchange through a strait due to tidal flow (1984)
    Springer
    Journal of oceanography 40 (1984), S. 19-28 
    Details
    ISSN: 1573-868X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The process of material transport through a strait due to tidal flow is modeled, and then the differences between various concepts of tidal exchange which have been used hitherto are pointed out using this model. In particular, the exchange of water itself and the exchange of material should be distinguished even in the case where the material of interest is carried by the water,i.e., the material and water move as one body. Further, the physical meaning of “tidal trapping” (Fischeret al., 1979) is discussed by using the model in this paper. The relationship between the exchange ratio for the water itself (r) and the phase lag (δ) of material concentration to the tidal stream in a section of the strait, which is an important factor in tidal trapping, is obtained as follows: $$\delta = \tan ^{ - 1} \left( {\tfrac{1}{r} - 1} \right)$$ Observational results at Lake Hamana (Shizuoka Pref) and at Kabira Cove (Okinawa Pref.) support the validity of the above relationship.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02071205
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  • 8
    Electronic Resource
    Electronic Resource
    Year-to-year change in water exchange characteristics in a semi-enclosed bya, Lake Hamana (1984)
    Springer
    Journal of oceanography 40 (1984), S. 199-206 
    Details
    ISSN: 1573-868X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The year-to-year change in characteristics of water exchange between Lake Hamana, a semi-enclosed bya, and the adjacent open sea is investigated. The destruction of the bay mouth by a typhoon in 1953 and subsequent stabilization work on the bay mouth from 1954 to 1973 resulted in an increase in the tidal prism volume of the bay (Mazda, 1983). In the present paper, a simple model has been constructed in which the magnitude of water exchange depends on the tidal prism, and using this model, the year-to-year increase in salinity of the bay water after 1953 can be well explained. Consequently, it can be said that the salinity increase after 1953 is a result of a progressive increase in water exchange caused by successive changes in topography of the bay mouth. The extent of water exchange in Lake Hamana, which varies seasonally, has increased gradually since 1953, and became stable after about 1967. For instance, at present the turnover time of the bay for exchange with open sea water reaches a maximum (2.9 months) in January and a minimum (0.9 month) in October, while in 1955 it is estimated to have been about 2.5 times that at the present time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02302553
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  • 9
    Electronic Resource
    Electronic Resource
    Vertical two-dimensional mechanism of tidal exchange in a bay with a sill-entrance (1985)
    Springer
    Journal of oceanography 41 (1985), S. 225-234 
    Details
    ISSN: 1573-868X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract For a vertical two-dimensional field with a sill at a bay entrance, the tidal exchange mechanism is discussed. The schematic model is proposed as follows. The tidal trapping effect which is detected at the entrance section,i. e., the material transport due to the phase difference between the tidal periodic constituent of material concentration and tidal current at the entrance section, results because the oscillatory tidal flow at the sill entrance induces a gravitational flow along the sill slope inside the entrance. Accordingly, the tidal trapping effect depends largely upon the difference in water density between the bay and open sea and the density stratification in the bay. This model is supported by the observations at Kabira Cove (Okinawa Pref.) and Lake Hamana (Shizuoka Pref.) in 1976 through 1984. In addition, based on this model, in the case of Lake Hamana, the activity of the tidal exchange is inferred to change seasonally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02109272
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  • 10
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    Tidal-Scale Hydrodynamics within Mangrove Swamps (2005)
    Springer
    Details
    Publication Date: 2005-12-01
    Print ISSN: 0923-4861
    Electronic ISSN: 1572-9834
    Topics: Biology
    Published by Springer
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    PAPER CURRENT
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