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A comprehensive study of satellite-derived suspended sediment concentration(SSC) during pre- and post-monsoon has been conducted with full-month cycles oftidal responses to study the suspended sediment dynamics in the Gulf ofKachchh. Tidal data were interpreted in conjunction with the OCEANSAT-1 oceancolor monitor (OCM)-derived SSC for pre- and post-monsoon. The analysis of thedata shows that the Gulf is predominantly affected by the tidal changes. Theaverage SSC during pre-monsoon were 30.8 mg/l (high tide) and 24.1 mg/l (lowtide); and during post-monsoon 19.7 mg/l (high tide) and 21.8 mg/l (low tide).The only little monsoonal influence is seen when Indus River dischargessediments during pre-monsoon due to increased sediment flux from its origin,Himalayas in spring (February-April) as compared to less sediment dischargeobserved during winter (November-December). The pre-monsoon SSC images showoverall high suspended sediments whereas post-monsoon SSC images showcomparatively low SSC. The use of enhanced resolution ocean color satellitedata (<360 m spatial resolution) for deriving higher SSC (>40 mg/l) formoderate/normal/high monsoon years under similar tidal conditions, and forquantifying sediment dispersal and dynamics and its validation is suggested asa future avenue of research.

Analysis of Pre- and Post-Monsoon Suspended Sediments in the Gulf of Kachchh, India Using Remote Sensing