Anomalous inland influx of the River Indus, Gulf of Kachchh, India

Chauhan, O.S.; Jayakumar, S.; Menezes, Andrew; Rajawat, A. S.; Nayak, Shailesh

doi:10.1016/j.margeo.2005.12.003

Cited by 28 publications

(16 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The existing data indicate that the Indus River is the only major source of sediments to the GoK, delivering about 59 × 10 6 tons of sediments annually into the ocean (Milliman et al 1982). Similar inference is drawn by several workers using suspended sediment concentration (SSC) and satellite imageries (Kunte et al 2003;Chauhan et al 2006;Ramaswamy et al 2007). However, at the present time there are no data pertaining to the contribution made by the southerly draining rivers of the Kachchh and the rivers from the Saurashtra peninsula.…”

Section: Introductionsupporting

confidence: 83%

“…So far the GoK has attracted many workers to study its offshore dynamics in this complex macrotidal regime. There have been several studies of the region which essentially addressed its current dynamics (Shetye 1999), suspended sediment transport (Nair et al 1982;Chauhan 1994;Kunte et al 2003;Chauhan et al 2004Chauhan et al , 2006Ramaswamy et al 2007), sediment character of sea floor (Hashimi et al 1978) and various sedimentation processes (Vora et al 1987;Babu et al 2005;Vethamony et al 2005Vethamony et al , 2007. However, comparatively the understanding of sedimentation along the coastline has remained 'Terra incognita', owing to the lack of work published on its geomorphology and textural attributes (Kar 1993;Maurya et al 2008;Prizomwala et al 2010;Shukla et al 2010).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Understanding the sediment routing system along the Gulf of Kachchh coast, western India: Significance of small ephemeral rivers

Prizomwala

Bhatt

Basavaiah³

2014

J Earth Syst Sci

View full text Add to dashboard Cite

The present study is an attempt towards understanding the sediment routing system in the semi-arid margin of the Gulf of Kachchh, which is one of the largest macrotidal regimes in the northern Arabian Sea. Investigations based on heavy minerals, clay minerals, mineral magnetic properties and sediment geochemistry indicated that there are three major sources of sediments contributing to the Gulf of Kachchh basin: (1) Indus River, (2) Kachchh mainland coastal rivers and (3) the Saurashtra peninsular coastal rivers. The flanks of northern and southern coast of western Gulf of Kachchh show dominant signatures of Kachchh mainland/Saurashtra peninsular provenance. In contrast, the eastern Gulf of Kachchh coast bearing fine grained sediments shows dominant Indus River Provenance. Although ephemeral in nature, the small coastal rivers of Saurashtra and Kachchh contribute significant amount of sediments to the Gulf of Kachchh coastline because of their 'dryland' nature and thus they control the coarse grained sedimentation processes.

show abstract

Section: Introductionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Understanding the sediment routing system along the Gulf of Kachchh coast, western India: Significance of small ephemeral rivers

Prizomwala

Bhatt

Basavaiah³

2014

J Earth Syst Sci

View full text Add to dashboard Cite

show abstract

“…The term (m 0 /H)N S represents additional nutrient in the system through vertical diffusion from sediments at the depth H. The N S is the sediment nutrient concentration and m 0 refers to vertical mixing rate. As mentioned in Section 2.1.1, sediments in the Gulf of Kachchh are suspended matter and clay particles with high concentration between 21 and 69 mg/l (Chauhan et al, 2006).…”

Section: Nutrient (N)mentioning

confidence: 96%

Mathematical modelling of the seasonal variability of plankton and forage fish in the Gulf of Kachchh

Kumar

Kumari

2015

Ecological Modelling

View full text Add to dashboard Cite

“…The sediments in the Gulf of Kachchh are suspended matter and clay particles with high concentration between 21 mg/l and 69 mg/l (ref. 18). …”

Section: Description Of the Terms Of The Ecological Modelmentioning

confidence: 99%

Modelling of Plankton and Forage Fish Variability in the Gulf of Kachchh Using 2D Coupled Physico-Biological Model

Kumar¹,

Jayaraman²,

Kumari³

2017

Current Science

View full text Add to dashboard Cite

A biophysical coupled model, which includes interaction of processes at different spatial and temporal scales, is used to assess the seasonal variability of plankton and forage fish. A five-compartment nutrient, phytoplankton, zooplankton, detritus, forage (NPZDF) ecological model is coupled with hydrodynamic model to understand the interaction of hydrographic characteristics and ecological dynamics in the study area. Operator splitting method is used to handle two different physical and biological scales for numerical simulation of the resulting partial differential equations. Gulf of Kachchh (2220N-2340N, 6820E-7040E), in the northwest coast of India is used for the application and validation of the model's behaviour. This region demonstrates rich biodiversity and productivity in highly turbid and varying marine conditions. Co-ordinate transformation is used to convert the irregular coastal geometry of Gulf of Kachchh into a rectangular domain. Numerical experiments, together with sensitivity analysis are carried out to get the values/ranges of the model parameters. The model application is able to bring out many striking features of the Gulf of Kachchh including bimodal oscillations observed in the ecological data of the region.Keywords: Gulf of Kachchh, physico-biological model, plankton and forage fish.ECOSYSTEM models for marine species are based on an ecosystem management approach and species by species analytical stock assessment using population dynamics. Food is an important factor that influences growth, migration and abundance of fish stock both in time and space 1 . Light and circulation are the major physical factors and nutrient and plankton constitute the major biological factors for selecting their habitat and growth by species in the marine environment.Plankton production in aquatic environment depends upon availability of nutrient and light. A basic mathematical formulation for nutrient and plankton dynamics has been reported earlier [2][3][4] . Nutrients are dissolved inorganic forms of nitrogen, phosphorus and silicon, which are utilized by photosynthetic organisms in the formation of organic matter or phytoplankton. Phytoplanktons are plant forms of plankton community, capable of photosynthesis in the presence of sunlight and serve as the basic food source for all aquatic food chain. Zooplanktons are small floating animals and are predators of phytoplankton. Along with phytoplankton, they make up the planktonic food supply in food chain. Forage fish production is based on ecological transfer of primary production to forage. It is a secondary consumer and occupies central position in the marine food web. Higher concentration of primary production conserves alleviated level of secondary and tertiary production. This process of forage fish production has been modelled earlier 5,6 where a model of tuna forage distribution in the equatorial pacific based on advection-diffusion reaction equation was proposed with constant recruitment of primary production.The physical, biological and chem...

show abstract

Anomalous inland influx of the River Indus, Gulf of Kachchh, India

Cited by 28 publications

References 17 publications

Understanding the sediment routing system along the Gulf of Kachchh coast, western India: Significance of small ephemeral rivers

Understanding the sediment routing system along the Gulf of Kachchh coast, western India: Significance of small ephemeral rivers

Mathematical modelling of the seasonal variability of plankton and forage fish in the Gulf of Kachchh

Modelling of Plankton and Forage Fish Variability in the Gulf of Kachchh Using 2D Coupled Physico-Biological Model

Contact Info

Product

Resources

About