Studies on tide depended salt-silt wedge and identification of turbidity maxima in Cochin estuary

136-142 Present study consists the development of salt-silt wedge in the estuarine environment and the identification of the occurrence of turbidity maxima zone(s) during the pre-monsoon season in the southern arm of Cochin estuary. An occurrence of secondary turbidity maxima zone has also been identified. It also consist Concurrent features among various hydrographic parameters, such as temperature, salinity, turbidity and current pattern The oscillatory behavior of the turbidity maxima zone(s) are analyzed with respect to the tidal rhythm. </smarttagtype

Intermittent particle dynamics in marine coastal waters

Marine coastal processes are highly variable over different space scales and timescales. In this paper we analyse the intermittency properties of particle size distribution (PSD) recorded every second using a LISST instrument (Laser In-Situ Scattering and Transmissometry). The particle concentrations have been recorded over 32 size classes from 2.5 to 500 μm, at 1 Hz resolution. Such information is used to estimate at each time step the hyperbolic slope of the particle size distribution, and to consider its dynamics. Shannon entropy, as an indicator of the randomness, is estimated at each time step and its dynamics is analysed. Furthermore, particles are separated into four classes according to their size, and the intermittent properties of these classes are considered. The empirical mode decomposition (EMD) is used, associated with arbitrary-order Hilbert spectral analysis (AHSA), in order to retrieve scaling multifractal moment functions, for scales from 10 s to 8 min. The intermittent properties of two other indicators of particle concentration are also considered in the same range of scales: the total volume concentration <i>C</i>_vol-total and the particulate beam attenuation coefficient <i>c</i>_p(670). Both show quite similar intermittent dynamics and are characterised by the same exponents. Globally we find here negative Hurst exponents (meaning the small scales show larger fluctuation than large scales) for each time series considered, and nonlinear moment functions

The exponents (<i>H</i> and <i>α</i>) derived for Chl-a and SST images for Mauritanian region. The Hurst exponent <i>H</i> derived through <i>SF</i> (<i>H</i> = <i>ζ</i>(1)).

<p>The exponents (<i>H</i> and <i>α</i>) derived for Chl-a and SST images for Mauritanian region. The Hurst exponent <i>H</i> derived through <i>SF</i> (<i>H</i> = <i>ζ</i>(1)).</p

Studies on improvement of flower quality with soilless nutritional solution culture supply on cut oncidium production (二)

The enrichment of key elements such as calcium and magnesium will be the influentical factors for high quality cut oncidium, and together with the diversity of main production season on September ~ November can be the important key point for cut oncidium industry. The project will conduct on soilless medium apply the key elements for irrigation supplement to pursue the vegetative growth, and to promote flower quality and to accelerate the vegetative bud growth. Consequently, the continuative flower will be favorable in reproductive growth to divere the main production season.The cut oncidium quality includes floret number pedicel length、branch number and vase life and simulative exporting arrival quality will be evaluated.高品質文心蘭切花生產之關鍵元素鈣、鎂元素之補施及產期之分散錯開主要產期9~11月是發展文心蘭切花產業之重要關鍵，本計畫以無土養液介質搭配養液供給關鍵元素，探討植株營養生長之影響，提昇開花品質並研究加速營養芽之生長，有利持續開花之生殖生長，分散產期，調查生產之切花品質包括花朵數、小花枝長、分叉數及瓶插壽命及模擬外銷到貨品質之評估