Suspended sediment dynamics in Cochin estuary, West Coast, India

被引:14
|
作者
Vinita, J. [1 ]
Revichandran, C. [1 ]
Manoj, N. T. [2 ,3 ]
机构
[1] Natl Inst Oceanog, CSIR, Reg Ctr, Dr Salim Ali Rd,PB 16161, Kochi 682018, Kerala, India
[2] Natl Inst Oceanog, CSIR, Panaji 403004, Goa, India
[3] Govt Saudi Arabia, Gen Commiss Survey, Riyadh, Saudi Arabia
关键词
Ebb currents; Stratification; Velocity; Temporal variations; Tides; Sediment fluxes; TROPICAL ESTUARY; TURBIDITY MAXIMUM; SALT; WATER; FLUX; DISPERSION; TRANSPORT;
D O I
10.1007/s11852-017-0494-8
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
An observational study was conducted in Cochin estuary to examine the relative impacts of tidal and river runoff forcing upon suspended sediment dynamics at different time scales. Time series measurements of salinity and suspended sediment concentration (SSC) were conducted at spring and neap periods of wet and dry seasons. These data were complemented by measurements of tides, currents, vertical profiling of hydrography and turbidity at the main inlet of the estuary. The results showed that SSC was maximum at the main inlet and decreased towards upstream for both seasons. The intra-tidal variations of water column stability suggested that prominent stratification occurred at the main inlet as a result of torrential rain during spring tides of wet season. During neap tides of wet season, the runoff was relatively lower and intense turbulent mixing occurred during the ebb. During dry season, well-mixed (spring) and partially stratified (neap) conditions were noticed. Suspended sediment fluxes were also analyzed using the decomposition method to identify mechanisms of turbidity maintenance at the inlet. The fluxes were dominated by an advective component during both tidal phases of wet season and dry-neap period. In contrast, the tidal pumping was the main contributing process for residual fluxes during the dry-spring period. The residual sediment transport at the inlet was directed outward irrespective of tidal ranges and seasons due to the strong ebb currents with longer duration. These findings are significant for the development and protection of harbors situated close to the inlet in estuaries and for the efficient implementation of an integrated coastal management system.
引用
收藏
页码:233 / 244
页数:12
相关论文
共 50 条
  • [41] Role of sediment size in the distribution and abundance of metals in a tropical (Sharavati) estuary, west coast of India
    Fernandes, Maria C.
    Nayak, G. N.
    ARABIAN JOURNAL OF GEOSCIENCES, 2016, 9 (01) : 1 - 13
  • [42] Role of sediment size in the distribution and abundance of metals in a tropical (Sharavati) estuary, west coast of India
    Maria C. Fernandes
    G. N. Nayak
    Arabian Journal of Geosciences, 2016, 9
  • [43] Temporal and spatial variability of trace metals in suspended matter of the Mandovi estuary, central west coast of India
    R. Shynu
    V. Purnachandra Rao
    Pratima M. Kessarkar
    T. G. Rao
    Environmental Earth Sciences, 2012, 65 : 725 - 739
  • [44] Temporal and spatial variability of trace metals in suspended matter of the Mandovi estuary, central west coast of India
    Shynu, R.
    Rao, V. Purnachandra
    Kessarkar, Pratima M.
    Rao, T. G.
    ENVIRONMENTAL EARTH SCIENCES, 2012, 65 (03) : 725 - 739
  • [45] Carbon and nitrogen isotopic composition of suspended particulate organic matter in Zuari Estuary, west coast of India
    Bardhan, Pratirupa
    Karapurkar, S. G.
    Shenoy, D. M.
    Kurian, S.
    Sarkar, A.
    Maya, M. V.
    Naik, H.
    Varik, S.
    Naqvi, S. W. A.
    JOURNAL OF MARINE SYSTEMS, 2015, 141 : 90 - 97
  • [46] Long Term Study Of Sediment Dynamics Along Mangalore Coast, West Coast Of India Using Sediment Trend Analysis
    Sri Ram, Kumar P.
    Dwarakish, G. S.
    Nujuma, N.
    Gopinatha, Deepthi I.
    INTERNATIONAL CONFERENCE ON WATER RESOURCES, COASTAL AND OCEAN ENGINEERING (ICWRCOE'15), 2015, 4 : 1545 - 1552
  • [47] Foraminiferal and sediment geochemistry studies in and around Cochin backwaters, southwest coast of India
    Gandhi, M. Suresh
    Jisha, K.
    Jeshma, P.
    Tharun, R.
    INDIAN JOURNAL OF GEO-MARINE SCIENCES, 2017, 46 (11) : 2303 - 2313
  • [48] Observed Mixed Standing-Wave Signatures in Cochin Estuary on the Southwest Coast of India
    Kumar, P. K. Dinesh
    Srinivas, K.
    Muraleedharan, K. R.
    Thottam, Tony J.
    JOURNAL OF COASTAL RESEARCH, 2009, 25 (05) : 1106 - 1113
  • [49] Spatiotemporal variation of microbial communities in surficial sediments of Cochin estuary, southwest coast of India
    Joseph, Neetha
    Loganathan, Jagadeesan
    Jangid, Kamlesh
    Nair, Shanta
    ENVIRONMENTAL MONITORING AND ASSESSMENT, 2023, 195 (12)
  • [50] Input-export fluxes of heavy metals in the Cochin estuary, southwest coast of India
    Kalathingal Ramkollath Lallu
    Sebin John
    Kallungal Ravunnikutty Muraleedharan
    Thundiyil Raju Gireeshkumar
    Pallikkoottathil Balakrishnan Udayakrishnan
    Dayana Mathew
    Sachin Mathew
    Chennicheri Revichandran
    Maheswari Nair
    Perunninakulath Subrayan Parameswaran
    Kizhakkepatt Kalathil Balachandran
    Environmental Science and Pollution Research, 2023, 30 : 2771 - 2786