20Jun 2017

MANAGEMENT OF THE SEDIMENT TRANSPORTED BY THE SOUTH MAHANADI DELTAIC RIVERS TO THE CHILIKA LAGOON.

  • HoD (Civil Engineering Department), Centurion University and Technology, Bhubaneswar.
  • Abstract
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The largest lagoon, the Chilika receives major inland flow and sediment from the Mahanadi River via distributaries, the Daya and the Bhargovi. The lake acts as a balancing reservoir for the south Mahanadi Delta and receives sediment mainly during South West monsoon. The excess sediment load and lithification are the grounds for downsizing and deterioration of eco-health of the lagoon. To maintain hydrodynamics and salinity, a straight channel was dredged at Sipakuda (2000) in the Chilika and the Naraj barrage (2004) was constructed at delta head. Renovation of the Gabakund cut on Bhargovi left embankment (2007) is diverting 50-60% of flood to sea (before reaching the lagoon). Pre and post interventions influence the sediment flow to the lake. Suggestions for maintaining threshold sediment flow to the lagoon by the rivers Daya and Bhargovi were ascertained. The methods used in the investigation are regression analysis and stochastic modeling. It is observed that nonlinear regression with power function and logarithmic 3rd order equation having R2 value of 0.96 gave the suitable PDF relations. The estimate of Sediment during monsoon by Gumbel II and log Pearson Type III was done where LPT III type estimation was found fitting. The reduction in concentration of sediment flow in the Mahanadi River, drop in country flow to the lagoon due to geriatric River, the Bhargovi and various strategies for controlling sedimentation in the Chilika lagoon are detailed in the study.


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[Siba Prasad Mishra. (2017); MANAGEMENT OF THE SEDIMENT TRANSPORTED BY THE SOUTH MAHANADI DELTAIC RIVERS TO THE CHILIKA LAGOON. Int. J. of Adv. Res. 5 (Jun). 1005-1020] (ISSN 2320-5407). www.journalijar.com


Siba Prasad Mishra
Centurion University of Technology and Management, Jatni, Bhubaneswar, Odisha, India

DOI:


Article DOI: 10.21474/IJAR01/4503      
DOI URL: https://dx.doi.org/10.21474/IJAR01/4503