D. K. Maiti

Bio: D. K. Maiti is an academic researcher. The author has contributed to research in topics: Siltation & Training (civil). The author has an hindex of 1, co-authored 2 publications receiving 4 citations.

Design of a Minor Fishing Harbor in India with Special Reference to Training of the Mouth of River Chapora

Abstract: Most of the fishing harbors along the Indian coast are located within the tidal inlets, barring a few on the open coast. Fishing harbor on an open coast needs protection in the form of breakwaters or training walls for providing tranquility conditions and safe vessel maneuvering and landing facilities. Practically, all inland fishing harbors suffer siltation problems. The studies on the development of a new inland fishing harbor on River Chapora (15° 36′4 6.22″ N and 73° 44′ 51.34″ E) in the state of Goa in India with such problem were carried out, the results of which are reported in this paper.

Artificial Reefs: A Review

Abstract: A comprehensive literature review on the material characteristics, design of size and shape, application and management of artificial reef has been carried out. Multipurpose Artificial Surfing Reefs (MPASR) are increasingly being adopted for coastal protection because of several advantages associated with them such as coastal protection by reducing the wave energy, recreation of beaches (surfing, fishing, and diving), habitat for marine organisms and increase in socioeconomic prosperity. The most important characteristic is that they are soft barriers. It is concluded that although artificial reefs do have the ability to fulfill many objectives, for which they are meant, their success will depend mainly on the quality of planning and management prior to their implementation.

Coastal Protection Using Geosynthetic Containment Systems—An Indian Timeline

Abstract: Maritime countries like India face serious coastal erosion issues. Over 1200 km of Indian coastline is identified as eroding. Unavailability and high cost of natural rocks remain as a major hindrance for construction of conventional hard options like breakwaters, seawalls and groynes. This has forced coastal engineers to find nature friendly and economical alternatives. Experiences from Australia, Germany and United States prove the efficacy of geotextile containment systems in coastal protection. This chapter aims at reviewing Indian examples of protection works using geosynthetic and geotextile containment systems from early 1980s. Geosynthetic protection structures include groynes, submerged reefs, seawalls and breakwaters. Benefits and difficulties in implementation of protection works are identified by reviewing prominent works conducted in the east and west coast of India. Experiences at Hamla, Dahanu and Pentha helped in replacing conventional structures with geotubes. Equilibrium beach profile is attained using near-shore geotube reef system at Hamla and Dahanu, Maharashtra, whereas reef constructed using geotextiles at Candolim, Goa suffered serious damage due to vandalism and toe scour. Geosynthetic systems along with gabions and rock armours improve the stability, wave dissipation and reflection characteristics as seen in Pentha, Odisha and Uppada, Andhra Pradesh. Lack of proper design criteria and deliberate destruction by vandals remains as the major threat. Countering these challenges, geosynthetic containment systems offer a cost-effective alternative to conventional coastal protection methods in India.

Preliminary investigation on stability and hydraulic performance of geotextile sand container breakwaters filled with sand and cement

Abstract: Breakwaters are essential constructions providing tranquility to ports and harbour structures, when there is a lack of natural protection measures. Traditionally these massive structures are constructed using natural rocks weighing tonnes. In the present scenario, obtaining huge natural rocks are difficult as well as non-eco-friendly. Geotextiles sand containers (GSCs) emerges as a suitable alternative for the rock armour units of breakwaters and various literatures supports its efficacy. The present investigation aims at analysing the performance of GSCs when filled with a calculated amount of cement and sand. The Hydraulic performance and stability analysis of cement and sand filled geotextile breakwater models are carried out in a 1:30 scaled monochromatic wave flume. When GSC breakwaters are filled with sand and cement, up to 43% increased stability is observed with a considerable decrease in wave runup, rundown and reflection, than sand-alone filled units. As a result, cement-sand filled GSC units can be suggested as a possible alternative to sand alone filled units where vandalism has to be countered.