Background: Gujarat has the longest coastline of all the states in India - 1,600 km (one third of the total Indian Coastline of 4,800 km). Sea water ingress, which was observed to a distance of 2.5 - 4.5 km from the coast in 1971, had encroached inland to a distance of 5.0 - 7.5 km. from the coast in 1977. An increase in the ratio of chloride, carbonate and bicarbonate ions (CL / CO3, HCO3) was also noted towards the coast, indicating considerable mixing of seawater with local ground water. Due to this, both, quality and crop yields in the coastal belts of Saurashtra and Kutch, known for cultivation of high value cash crops (rice, wheat, sugarcane, mango, coconut, garden vegetables, etc.) decreased between 33% - 90% vis-à-vis original yields. Similar adverse effect has been witnessed in the area of Gulf of Khambhat too. Among the different stretches of Gujarat’s coastal wasteland, characteristics of Gulf of Khambhat are unique and are known for its vast saline mudflats and an estuarine complex along the coast. Gulf of Khambhat is 70 km wide and 130 km long indentation on the western shelf of Indian coast between Saurashtra Peninsula and the main land of Gujarat. Nine rivers, including the Narmada, Tapi, Mahi and Sabarmati meet Bay of Khambhat and drain water from about 150,000 Sq. Km. Bay of Khambhat receives 45% of mud with total quantity of waters. Stretches with mud flats are influenced by marine deposition and by river action. The gulf has a marshy coastline on all sides and is also dotted with small islands locally described as ‘Bhets’. The region is locally known as Bhal because of the barrenness, which is again due to high levels of salinity. |