Assam reels under unseasonal heat wave, water shortage

It is related to global warming and the delay in the pre-monsoon rainfall, says Met expert

 
By Amarjyoti Borah
Last Updated: Monday 17 August 2015 | 08:55:30 AM

On April 24, the Kamrup metro district administration in Assam issued a directive to all the schools and colleges in its jurisdiction to stay closed the next two days. Authorities in some other districts in the state, including Goalpara and Morigaon, followed suit.

The reason was something unheard of in the state in April—extreme heat had broken all previous records.

According to the Met department, on April 22, Guwahati recorded 40 °C and the next day the temperature rose to 40.1 °C, forcing most residents in the city to stay indoors. Guwahati’s average normal temperature at this time of the year is 31 °C.

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Kamrup metro district deputy commissioner, Ashutosh Agnihotri, said the directive to close educational institutions was issued keeping in mind the extreme heat. He said the weather situation continues to be closely monitored and necessary steps will be taken if need arises.

Poli Saikia, a school teacher of the Arabari school in Kamrup, said the heat had become unbearable and fans were not working most of the time because of prolonged power cuts. She said the school authorities had started fearing that students might faint.

“We are keeping water in all the class rooms and are asking the students to drink water frequently, and are also giving frequent breaks in the middle,” she said.

According to meteorological experts, the heat wave is related to global warming, and delay in the pre-monsoon rainfall.

Only one rainy day this April
“At this time of the year, the temperature is moderate because of pre-monsoon rainfall, however, this year there has been a major deficit in the pre-monsoon rainfall, which is largely responsible for the rise in temperature,” said Rajib Locan Deka, assistant professor at the department of agro-meteorology at the Assam Agriculture University (AAU).

Deka said the number of rainy days in April in Assam is normally 13, but this year till April 27 only one day was rainy (when there is more than 2.5 mm rainfall in a day).

“Normally Assam receives around 200 mm rainfall between April 1 and April 30, but this year from April 1 till April 27 the state had received only 23 mm rainfall,” added Deka.

The extreme rain deficit has severely affected the residents of the Guwahati city. Normally, the city does not face water scarcity, but this year, the city has been facing extreme dry and rainless period for almost six months.

“Earlier also the state had experienced dry period, but this year it appears far more acute. The Assam government will seriously look into the issue,” said Assam environment and forests minister Rakibul Hussain.
This shortage has led to a boom in the business of selling water. “We are forced to buy water as we don’t have any other option. We have received no proper rainfall for almost six months, and our water pump doesn’t work anymore. Besides, our well has also dried up completely,” said Nizara Kalita, a 67-year-old housewife in the city.

According to the district administration, a huge number of localities in the city are facing water shortage.
People said a major reasons for the problem is the haphazard drilling of deep tube wells in residential areas and selling the water from them commercially. The district administration has taken some initiative to check this.
“Directives have been issued to the planning and regulatory bodies, like the Guwahati Municipal Corporation (GMC), to immediately verify and take immediate measures to stop such activities,” said Agnihotri. He added that GMC has been asked to identify establishments engaged in illegal water extraction and selling business in Guwahati city and take strict action against the offenders.

Hydropower hit, power outages the norm
The absence of rains has also affected power generation from hydro power projects in the state, leading to massive power cuts.

“The entire state is suffering massive power crisis as a result of low water levels in reservoirs of several hydro power generating stations in the state and the region like Ranganadi, Kopili, Khandong, Doyang, and Loktak,” said Rajiv Yadav,  chairperson of Assam Power Distribution Company Limited (APDCL).
Yadav said there is a shortfall of about 275 MW, and now the state is mostly dependent on thermal stations at Kathalguri, Palatana, Ramachandranagar, Namrup and Lakwa. Assam industry and power minister, Pradyut Bordoloi, said APDCL is trying to tide over the shortage by procuring 300 MW from outside the region. The minister added the power position is likely to improve with rainfall in the region and further production of gas.

Farmers’ fears
Farmers fear this rainless period will impact their produce severely, and have appealed to the agriculture department to look into it. Most of the agriculture in the state is rainfed as majority of the irrigation projects in the state are in disuse.

agriculture.

“I had cultivated boro rice in my 2.5 acre [one acre equals 0.4 ha] land, and was planning to cultivate kharif crops in my remaining three acres. However the absence of rains has left me with no hope; the land has become too had to till and the yield from the boro rice cultivation will be inadequate,” said Sunadhar Kalita, a 48-year-old farmer from the Koniha village in the district.

Farmers said though they have been advised to use tractors to till their “hard land” and use motor pumps to extract irrigation water, they are not doing so as it will escalate costs and put them in debt.

“We experienced this in the past. If we use diesel pump-sets we will need to pay for the oil from our pocket; use of tractors also increases costs. But if the yield is not up to the mark, we will need to borrow money for the diesel and tractor,” said Bubai Hazarika, a 42-year-old farmer from Chetiagaon village in Jorhat district in Assam.

Agriculture department said majority of the farmers who are engaged in boro rice cultivation are dependent on rain and will be severely affected by the dry spell.

“Boro rice is traditionally cultivated in the low-lying areas, and the irrigation facilities are not adequate there which makes the farmers dependent on the rain,” said Mawsam Hazarika, a senior official of the Assam agriculture department. 

“Many of the irrigation projects in the state have been non-functional for long as a result of the lack of funds, but efforts are now being made to make those functional,” said Ardhendu Dey, Assam irrigation minister.
Assam’s agriculture minister, Nilomoni Sen Deka, said he has asked the district administrations to look into the matter but that the Model Code of Conduct in force at present because of ongoing Lok Sabha elections, is a hindrance to making announcements till May 16. “If the situation does not improve within a few days, I will approach the Election Commission of India and the state election department of Assam to allow us to announce some relief packages and compensation,” the minister said.

agriculture

Farmer activists are, however, not satisfied with the agriculture minister’s statement and have alleged that this shows the casual approach of the department towards farmers in the state.

“The agriculture department is there to solve the problems related to agriculture and the farmers in the state, and it should have some schemes to deal with situations like this, so that no one needs to wait till the Model code of Conduct is over,” said Akhil Gogoi, a farmer activist.

Chief Minister Tarun Gogoi reviewed the situation in the state on April 26, and has also asked the concerned departments to prepare both short- and long-term measures to mitigate the problems.

 Gogoi asked the agriculture department to draw up a contingency plan if the situation arising out of low rainfall persists in the state.

The Chief Minister has asked chief secretary Jitesh Khosla to monitor the situation and brief him at regular intervals.
 

Driest decade for monsoon in 110 years

Trend analysis of rainfall:
Annual rainfall in the Brahmaputra valley showed a decreasing tendency by a rate of 72.0 mm/decade during last three decades (1981-2010) and was mainly contributed by significant decrease of monsoon rainfall (103.8 mm/decade). Monsoon rainfall decreased by 94.1 mm/decade, 53.6 mm/decade and 156.2 mm/decade in the eastern, central and western parts of the Brahmaputra valley. The rate of decrease of monsoon rainfall during the same period in the adjacent Barak valley was 168.1 mm/decade. The recent decade (2001–10) was found to be the leanest decade of the last 110 years in both the valleys. The last decade was the driest decade since 1901.

On the contrary, pre-monsoon and post-monsoon rainfall exhibited an increasing tendency. Pre-monsoon rainfall exhibited an increasing tendency by 17.4 mm/decade during 1981-2010 over the Brahmaputra valley due to statistically significant increase of April rainfall in the western part. During the same period, post-monsoon rainfall in the Brahmaputra valley increased by a rate of 16.1 mm/decade due to increasing tendency of October rainfall. However, winter rainfall over the valley has decreased by 7.3 mm/decade during 1981-2010 due to statistically significant decreasing tendency of December rainfall in the eastern and central parts of the Brahmaputra valley.

Trend analysis of temperature:
Annual mean temperature in the Brahmaputra valley increased significantly due to the rise of both maximum and minimum temperature during last 60-years (1951–2010). Maximum increase was noticed in post-monsoon followed by winter seasons. The warming trend in the valley was particularly pronounced in the recent 30 years period and was 1.6 times higher than the all-India average. During this period (1981-2010), minimum temperature increased at higher rate than that of maximum temperature due to significant decreasing tendency in the annual occurrence of cold nights and a significant increasing tendency in annual occurrence of warm nights.

Source: Rajib Lochan Deka, Assistant Professor, Department of Agrometeorology, Assam Agriculture University, Jorhat


Report: State of the climate 2014

Report: Turn down the heat: climate extremes, regional impacts, and the case for resilience

Research: Quasiresonant amplification of planetary waves and recent Northern Hemisphere weather extremes

Report: Awareness as an adaptation strategy for reducing mortality from heat waves: evidence from a disaster risk management program in India

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  • This is just the beginning.

    This is just the beginning. The worst is yet to come. Pre-monsoon and Post-monsoon showers are a serious threat as it increase the Pest Contamination.As a result Farmer suicides are very common these days but nobody cares.

    Posted by: Anonymous | 5 years ago | Reply
  • 1. Gauhati temperature -- the

    1. Gauhati temperature -- the highest from normal book is 41.1 degrees Celsius for the month of May

    2. Gauhati rainfall -- the rainfall presents high variation -- the lowest to the highest. Also, the data presents a cyclic pattern -- here we must note a drastic change from 1957 -- the unit of measurement changed from inches to millimeters.

    3. Cyclic variation -- though all India Southwest Monsoon precipitation presents a 60-year cycle, sub-divisional rainfall presents somewhat different pattern. The land use and land cover play an important role in the changes in the magnitude of rainfall.

    4. During below the average rainfall period the temperatures go up and during the above the average rainfall period the temperatures go down.

    When an article is written some of these factors must be taken into account. Also, in Assam there are wide variations in rainfall and temperature from region to region. -- Cherrapunji extreme in May was 28.9 degrees Celsius. Dibrugarh 36.7, Tezpur 38.9, Dhubri 41.1, Lumding 41.9, Shillong 30.8 -- here height of the location also play vital role.

    Dr. S. Jeevananda Reddy

    Posted by: Anonymous | 5 years ago | Reply
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