By M. Monirul Qader Mirza
This publication provides multi-disciplinary analyses of the environmental results and implications in Bangladesh and India of the Ganges water diversion. The analyses display that the downstream a part of the Ganges River basin in Bangladesh, which has a delicate environment, has develop into very prone to water diversion and consequently it has triggered major harm to many fiscal sectors and ecosystems. parts upstream of the Farakka Barrage in India became extra liable to floods and riverbank erosion. The Kolkata Port has marginally benefited from the water diversion. within the Hooghly River estuary, populations of wildlife have thrived. within the downstream parts of Bangladesh expensive variation measures were followed and in lots of circumstances damages are irreparable. A nearby cooperative framework is gifted to foster water assets and environmental improvement within the Ganges River basin.
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Additional info for The Ganges Water Diversion: Environmental Effects and Implications (Water Science and Technology Library)
Example text
Damages had occurred earlier due to the breach in flood embankments, especially in 1996. But the flood damage of 1998 was unprecedented. 1 million people in the Malda District, 450 people died during and after the flood, 250 cattle were lost, 200,000 houses were totally destroyed, 150,000 houses were damaged, and standing crops in 150,000 hectares were destroyed. The estimated cost of damages of the 1998 flood in Malda was about Rs. 10,000 million (about US$ 250 million at 1998 price). 2 The Central Government of India has recently stepped up and allocated some resources for undertaking erosion control measures.
The standard deviations of the two periods have been calculated as 7,299 m3/sec and 11,523 m3/sec, respectively. This indicates a 58% increase in the standard deviation which has occurred during the post-Farakka period. Non-homogeneity has been tested in two stages. First, the F-test for checking the stability of the variance has been applied and found unstable. Therefore, the t-test has not been applied to check the changes in the mean (Dahmen and Hall, 1990). Second, other statistical tests confirmed change in the mean of the two peak discharge series at the Hardinge Bridge.
5 m higher than the design afflux. An afflux occurred due to the lateral and vertical constriction of waterways in the barrage and the consequent head losses upstream and downstream of the structure. Had there been no barrage, there would have been very little afflux. 2 UNOPERATIONAL SPILLWAY GATES It is reported that a large number of spillway gates on the left bank (Malda side) are non-operational due to heavy siltation on the left side of the barrage upstream. 2) upstream of the barrage, the left side of the barrage (on the inner side of the bend) receives the sediments.