Remedial methods for Geomechanical threats associated to River Hydraulics: Selected Case Studies in India
Ghritartha Goswami ; Joydeep DuttaSudip Basack ; Bini Kiron ; Habung Bida ;
For each and every geologist, engineers, and hydrologist the study of river science and engineering has been and would be, one of the important study areas to be reckon with. The open channel flow such as river and associated hydraulics often initiate several geomechanical hazards including silting, scouring, meandering, migration, and floods. Such sort of hazard may lead to disastrous consequences if adequate remedial measures are not undertaken. In this paper the selected case study has been chosen for the northern and north-eastern parts of the India where such sort of phenomena has been witnessed such as Kosi and the Brahmaputra River. The relevant conclusions have been drawn in this paper. In this paper, two above selected cases in India have been described. Here are the important observations which are made have been briefly summarized: the first study is the alluvial basin of the Kosi river, with a maximum peak migration rate of 2.5744 km/year. Such migration could produce significant erosion and siltation, introducing severe civil and environmental hazards. By constructing appropriate barrage and associated hydraulic structures can reduced such risks. For the second case i.e., Dibrugarh town the foremost hazard observed was frequent flood which was associated with immense land erosion and migration of river channel. By the construction of spurs and the associated hydraulic structures, the solution has been demonstrated effectively. The research work is in progress and interesting results are presented in the full-length paper.