TODAY -

Climate change impact on Manipur's wetland

Sobhapati Samom *



Urbanization and encroachments,conversion of the low lying areas into farms,aging, disposal of garbage, leaching of chemical fertilizers, and toxic chemicals besides aging and the climate change are the major causes of degrading, polluting and ultimate dying of the wetlands in Manipur.

Lakes are known as 'pats' in Manipur. They play a vital role in the socio-economic and cultural life of the people. Experts believed that a key future sustenance of human societies lies in the sustainable management of wetlands as more than three quarters of the food required for mankind is still being derived directly from wetlands in the form of rice and fish alone.

Wetland cover nearly 2.37 per cent of Manipur's total geographical area(22,327 sq km). A study on 'Shrinking water area in the wetlands of the central valley of Manipur' by Abha Lakshmi Singh and Khundrakpam Moirangleima of Aligarh Muslim University's geography department said. There are about 155 wetlands of which 153 are located in the central valley while 2 in the hill districts.

Loktak, the largest fresh water lake in north eastern India (including 4 tiny wetlands- sanapat, laphupat, thaunamchapat, utrapat and keibul lamjao floating park) covers an area of 24,672 hectares during monsoon(post monsoon - 23,246 hectares). Echoing a similar sentiment, Environmentalist and former head of Botany department, DM College of Science Dr H Nandiram Sharma said there were more than 100 lakes in the early 20th century in Manipur. Even the existing surviving lakes are also on the verge of extinction at fast rate as they are threatened both from natural and from anthropogenic forces.

Hurricane like strong tropical wind which was presumed to have been originated from Arab countries has started to reach Manipur in between April-May period for the last three consecutive years since 2008. Thus it uprooted standing crops in hundreds of hectare besides destroying houses in the last three years.

According to latest annual report of Relief and Disaster management department,state has spent Rs 60.45 lakhs to provide relief to natural calamities including fire,flood and hailstorm though there's no official figure of damages.

"I never experienced such a strong wind that the entire state in my life time," Ecology Professor B Manihar Sharma of Manipur University's Life Science department said. "Such wind which came with dust and rain will help to raise the lake current beside polluting it and subsequently sensitive fish and plants die fast".

This is one clear example of climate change impact in the lakes, the professor observed. Besides the rise of temperature of lake water also affected habitat of soft scale local fishes such as Porom, Meitei Ngamu and tiny fish species Ngakha and Ngasang. A decade back, the maximum temperature in Manipur's capital city Imphal was about 30 to 33 degree Celsius. But it was rose up to 35.7 degree Celsius last year though it goes down to 34.3 degree Celsius this year like that of previous years(2007 and 2008).

"Manipur wetlands are approaching to desertification", says T Brajakumar, analysis of state's Environment and Ecology Wing under forest department said. "Artificial eutrophication coupled with climate change is another threat to our wetland."

State's popular Loktak, Pumlen, Ikop, Waithou, Nagkrapat and the Loushi lakes are found to be much threatened due to artificial eutrophication and human pressure for cultivation and fish farming. According to the Economic Survey of Manipur 2009-2010 report, Manipur ranks second among the northeastern states in respect of urbanization while run-off from agricultural fields helps in siltation and pollution not to speak of draining of sizeable solid waste and sewage to lakes. The State consumes 67.40 thousand tonnes of chemical fertiliser in 2007-09.

Waithou lake located at the adjoining areas of Imphal East, West and Thoubal district,was once known to be the breeding place for the threatened fish species Ngaton (Labio bata) but after the construction of the Cheksabi barrage and ringbund during 1970s, the habitat of the fish has been completely vanished from the lake. State fish Pengba (Osteobrama belangeri) also extinct in wild but bred in ponds.

Likewise around 15 out of more than 200 fish species in Manipur were endangered "critically endangered" while 50 to 60 are highly vulnerable due to over-exploitation, pollution, flow modification, destruction or degradation of habitat, invasion by exotic fishes and notably due to climate change, Professor Dr Waikhom Vishwanath of Manipur University's Life Sciences Department felt.

"Many local fishes and plants were also available in Waithou lake. But many non-local fishes (common or grass or silver carps) replaces them", Laishram Sanakhomba, 67 of Saijin Pallak, a village located on the bank of the lake, said. "Many plants have also been disappeared".

Sanakhomba who now heads a 10-member family migrated from Haokha Kiyam Siphai in Thoubal district to the existing Saijin Pallak in Imphal East district with the hope of getting a self sustainable livelihood two decades ago.

But now almost all the 30 households of Saijin Pallak village including a cultivator L. Nanda(42) started to look out for other form of occupation to meet their ends as the growth and production of economic species like trapa (heikak), Euryale ferox(thangjing), nelumbo nucifera (thambal) nymphea (tharo) have been found much decreased in the recent past. Earlier the lake has as many as 35 macrophytic plants including eatable aquatic plants.

However it cannot be officially confirmed the exact number of plants or fishes disappeared from Manipur's wetlands due to factors relating to climate change and human pressure.

Earlier Sanakhomba depend their livelihood on Waithou by catching or collecting a minimum of Rs 200 to 300 worth local fishes or aquatic plants daily. Oinam Yaima,65,a resident of Chandrapur village near Moirang township in Bishnupur district who lives in a floating hut in Loktak for the last one decade also has a similar story.

"The cyclone type wind that had hit the lake early this year (April-May) had affected our environment besides destroying many floating huts", recalls the floating hut dweller. More than 10,000 individuals live on floating huts for their livelihood.

Amidst this, state's Environment and Ecology Wing under forest department adopting the theory of 'Late is better than Never' under the directive of Chief Minister O Ibobi Singh decided to take up proper conservation and management of 19 lakes in November 2010 following a decision.

They are

  • Pumlen/Khoidum/Lamjao,
  • Ekop (Kharung),
  • Loushi,
  • Waithou (Punnem),
  • Ahongbeekhong,
  • Ushoipokpi,
  • Sanapat,
  • Utra,
  • Tankha,
  • Karam,
  • Lamphel,
  • Yaral pat,
  • Zeilad,
  • Heingang,
  • Jaimeng,
  • Khayang Kachophung pat,
  • Lampelchoi and
  • Loktak pats (lakes).
The total water area covered by these pats is 397.82 square kilometer(39782 hectares).

However the government's move is yet to convince the state's environmentalists as some of them had been expressed dissatisfaction over the outcome of some of the projects which are being taken up in the State to save the major wetlands.




* Sobhapati Samom wrote this for Huieyen Lanpao (English Edition)
This article was webcasted on December 26 2010.


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