A field study report
by Uthpal Kumar and Rashed Jalal
by Uthpal Kumar and Rashed Jalal
In Khulna, Bangladesh - the Rupsha-Bhairab is a major tidal river system flowing in the eastern part of the city. This river joins the Bay of Bengal at Mongla sea port which is Bangladesh’s second largest sea port and plays a vital role in the social, economic and environmental sustainability of the third largest metropolitan city of the country. Through observations and discussions with multi-level local stakeholders we found out that this mighty river has been changing its natural course due to unregulated human interventions and rise in sea level rise due to the changing climate. This initial field study was conducted to analyze perceptions of climate change in peri-urban Khulna by the locals. Observed changes in river water level was the primary indicator for this study. For this purpose, a mixed livelihood group of people were interviewed at different locations of Rupsha- Bhairab rivers systems in Khulna. A brief summary of the stakeholders’ perceptions is given below.
Table 1: List of the selected livelihood groups.
Location | Livelihood group |
Alutala under Jalma union of Botiaghata upa-zila (sub-district) of Khulna | Local farmer |
Fisherman | |
Sluice gate operator | |
Rupsha ferry ghat, Khulna | Wood broker |
Fisherman | |
Local shopkeeper | |
Boat man | |
Ferry driver | |
Labor union leader | |
BIWTA ferry ghat, Khulna | BIWTA Officer |
Alutala is located approximately 10 km away from the Khulna City. It is a part of Jalma union under Botiaghata upazila (sub-district) in Khulna. There are 7 unions in Botiaghata upazilla and Jalma union is the biggest one having 33 villages. At Alutala, about 250 households depend on a single water source. However, there is no cyclone shelter at Alutala. The river Rupsha and Moyur have been flowing towards south-east and northwest direction of the village respectively, and thus, it is vulnerable to annual flood and climatic disasters. Local respondents at Alutala informed that the water level of Rupsha has been decreasing. They feel that construction of the Rupsha Bridge is one of the main reasons behind it. They also added that water current has also been decreasing due to sedimentation. One the other hand, the gate operator of Alutala regulator said that tidal water level at Rupsha River has been increasing (Table 1). He said that once he used to measure the water level at the regulator point but since long this has been stopped since long by the authority. Other respondents at the same time said that rainfall pattern has changed in the area and people suffer from frequent fever, diarrheal diseases, headache, allergy and nausea. Absence of rainfall in due time is a major perception of climate change by the local farmers. Farmers at this site informed that now they irrigate crop lands in dry period, whereas earlier they used rain fed agriculture in the same lands. All respondents felt that climate has been changing and rainfall is becoming scarce in dry season. Climatic disasters like cyclone and storm surge have also been occurring more frequently than the past, according to the locals.
Table 2: Perceptions of changes in water level during high and low tide in Rupsha.
Year/Time | Season | High tide (RL) | Low tide (RL) |
1990s | Dry | 10 | 2-3 |
Wet | 14 | 5-6 | |
2000s | Dry | 11 | 2-3 |
Wet | 16 | 6-7 | |
2010 | Dry | 13 | 3 |
Wet | 16 | 7-8 | |
During Aila | May | 18 | 10-12 |
Source: Interview with regulator operator on May 3, 2011.
Figure 1: Local stakeholders consultation at Tetultala Bazar near Alutala regulator.
Mr. Golam Rabbani, a local wood breaker at ferry ghat informed that Rupsha river has been drying after the construction of the Rupsha Bridge and the depth of the river is decreasing day by day. He added that the flooding condition of this area has been increasing. Sometimes flood water level becomes very high and the ferry ghat area gets flooded. Mr. Robbani explained that Rupsha ferry ghat road was built in 1980. That time ferry ghat road was not flooded and the road was about 2-3 ft higher than the high tide level. But now it gets flooded frequently during high tide. He tells that water level of Rupsha has been increasing. Mr. Robbani also feels that during the last 15 to 20 years river bed has been filled up by huge siltation. However, water pressure from the sea is also increasing. Natural disasters, like flood, drought, cyclonic storm surge has been increasing, but causes behind these extreme weather events are unknown. Mr. Robbani lost his entire family during the cyclone of 1991. He said that weather pattern has being cruel because of the anthropogenic impacts. Finally, Mr. Robbani comments that after 10 or 15 years each people should be required to have at least a website for storing personal information and information regarding disaster monitoring, money to purchase drinking water from the market, insurance for recovery.
On the other hand, Mr. Jamal Uddin (wood breaker) said that water level has increased in Rupsha ferry ghat area, especially during Ashar (mid June-mid July), Srabon (mid July to mid August) and Vadro (mid August-mid September). He feels that floodplains are mostly closed now. But earlier there was free flowing of river water (flood or tidal water) into the floodplains and low lying areas. As a result river bed has silted up as there is no place for free flowing tidal water and sediments it bears. The difference between the water level of high tide and low tide are 10 to 12 ft. However, before Farakka the tidal influence was less in Rupsha-Bhairab. Main tidal influence was in Mongla point. But now upstream freshwater flow has been reduced due to the Farakka Barrage and tidal influence is mostly in the Bhairab-Rupsha river system. Mr. Uddin said that long back in 1985 large boats used to go to Narail, Borodia and Kaliya from Khulna, but now it has been closed due to the reduced navigation in Rupsha-Bhairab River. Earlier water from Padma used to come at the Rupsha through Modhumoti River. After 1880s it has been closed, and saline water has started to come upwards from the Bay of Bengal. These factors have increased salinity in water and soil in Khulna and peripheral area.
Figure 2: The tidal water level reached to the road level of Rupsha ferry ghat. |
Ferry driver Mr. Mozid Gazi (75) said that water level during high tide is higher than previous years or period. He added that now tide height is higher during high and low tide. Mr. Gazi said that the sea water level also increasing. He also feels that earlier there were lots of open floodplain but now they are closed. As a result this phenomenon has also increased water level in this area.
Figure 3: BIWTA's port and traffic officer Mr. Munshi Mohiuddin is showing the signature changes in water level Rupsha-Bhairab river system at Railway Kastom Ghat in Khulna. |
A local fish merchant Mr. Shah Alam said that after construction of the Rupsha Bridge, water depth has decreased at least 10 to 12 ft. He added that 20-30 years back; water depth at ferry ghat point was around 90 to100 ft. But now it is only 30-35 ft, said by the local fisherman. Around 200 commercial fish depot is present at ferry ghat area. During Aila fish all depots were flooded by the water depth of about 1-1.5 ft. Now water is less in the river. River navigation has also been reduced due to huge sedimentation. Construction of Rupsha Bridge affected this navigability. Rainfall has been decreasing in Khulna. However, temperature has been increasing there.
According to Port and Traffic Officer of Bangladesh Inland Water Transport Authority (BIWTA), Mr. Munshi Mohiuddin, water level of the Rupsha has been increasing. He said, the present yard of the BIWTA was built about 25 years back. That time yard was not flooded because it was built about 1-2 ft high above the high tide level. But now it becomes flooded during high tide in most of the year, especially during monsoon. This indicates that water level has been increased. In July water level becomes very high and that is when the main road at BIWTA ghat goes under water. Last year water level increased more that 1ft than that of the previous year.
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Uthpal Kumar, uthpal23@gmail.com and Rashed Jalal, himal781@yahoo.com , June 2011