Prof. M. N. Madhyastha, Adjunct Faculty National Institute of Technology Karnataka,

Transcription

1 Interlinking of frivers Indian Context Prof. M. N. Madhyastha, Adjunct Faculty National Institute of Technology Karnataka, Surathkal, Shrinivasa Nagara, Mangalore , INDIA. 1

2 Need Water surplus & deficit areas within the same country exerting hardships to the community either flooding or draught problems. National water grid for transporting available surplus water to water deficit areas for converting blue water to green water thus providing livelihood security and water security. Inter state or intra state, inter - basin transfer. National Water policy 2002 National prospective I. Himalayan component II. Peninsular component Detailed Reports 2

3 3

4 Benefits Water security in water deficit area Blue water to green water and virtual water export Productivity enhancement Economic viability of the farmers Flood and draught control Canal transportation Rejuvenation of lakes and waterbodies Canal and reservoir fisheries enhancement Equitable distribution of the Resource 4

5 Facts about Indian Rivers Rain fed and snow fed rivers. Concept of Excess and Deficit issues so far as ecosystem integrity and survival. Cascading effects of water transport through annual cycle and lean season. Endemic and endangered species survival. Invasion of non-native species. Integrity of each river and basin in water quantity, quality and ddvestyo diversity of community. 5

6 Risks Extreme seasonal changes leading to acute scarcity of water during lean season. Uncertain monsoon leading to unsecured supply. Ecological integrity of each River/Stream at stake. Rich source of riverine fisheries and breeding grounds affected. Loss of biodiversity/change in composition/ invasion of non-native species. Transport of contaminants from river to river Fish sanctuaries and their conservation loss Migratory route of the aquatic organisms. 6

7 Risks contd.. Rehabilitation and resettlement of the displaced. Livelihood security of some communities. Coastal nourishment Impoverishment. Salt water intrusion due to poor river discharge at the mouth region during lean season. Shift in the community structure in the estuary with more of marine community. Change in the Biodiversity. Affecting feeding ground nurseries of fin-fish and shell fish species. Affecting CoastalAquifer level. l 7

8 Interventions Judicious implementation of plan weighing Merits & Demerits of each case. Utility of resource at head region depending on similarity of physical, chemical & biological characters. Transfer only during monsoon with storage areas. Analysis of cost-benefit in each case weighing more on environmental and human dimensions. i Suitable interventions to maintain/enhance bioresources 8

9 Interventions contd.. Steps to safeguard the interests of migratory/endangered/threatened species with implementable conservation measures. Policy issues of protecting riparian state benefits stakeholders right etc. Research issues to safeguard the resource availability, endemic species, water quality and modeling studies. Challenge of demand management and resource creation. 9