Flooding

Pre Project
Before implementation of the project, flash flood frequently entered into the haor area through the Kangsa, Konai and the Baulai river during third week of April. Local people informed that the local stakeholder temporarily built embankment to protect their crops from flash flood. Besides, the conveyance capacity of the water bodies was more at that period. This activities were not systematic and sustainable as well as reliable to withstand the flash flood.

Post Project
With a view to saving the Boro crops from flash flood, BWDB constructed the submersible embankment and other structures in 1993. After construction of submersible embankment and regulators, entrance of flood into the project area got delayed by 2 (two) weeks. Thereafter, flood water enters in the Chandra Sunarthal Haor through Kangsha River, Konai river Saitankhali khal, Dubail khal and Ranokhali khal at the end of April or 1st week of May from southern side of the haor. Local people reported that there are several vulnerable locations of embankment within Ghulua-Rajapur-Daulatpur and Katakhali through which flood water also enters into the middle of the haor system. At sometimes, due to the flash flood, the water enters early into the haor which is supposed to inundate two weeks later. At present, the crest levels of the embankment at some locations like Ghulua, Durgapur, Rajapur werefound to be lower the design level. The peripeheralrivers of this haor system has been affected by sedimentation over the years that further exaggerates the problem of flash flood. Mentionable that some greedy people (not fishers) cut the embankment for fishing through the cuts which damages the Boro crops.

Impact
Interventions of the haor have delayed the entrance of flood water by two weeks. However, flash flood sometimes enters early due to delayed repairing of embankment and public cuts. People demanded to complete the O&M work within February to avoid the hazard of flash flood. Stakeholders of Dakhsin Sukhair Rajapur also opted for strong monitoring for operation and maintenance of the embankment.

Drainage

Pre Project
According to the local people, in pre-project period most of the water could smoothly be drained out through the Konai, Baulai and Baulai River. They did not face drainage congestion and water logging problem at large scale before implementation of the interventions.

Post Project
The flood water is being drained outt through the peripheral riversas well as through Dubail regulator, which is located in the southern side of the project area. Flood water in and around the northern portion of the haor drains out through Chanpur regulator into Konai River. There are some low lying areas in the southern part where drainage congestion occurs. Local people informed that 65% areas of Dakhsin Sukhair Rajapur Union faces water logging problem for about 15 to 20 days. Local people of Jyosree (upstream side) informed that they are not facing drainage congestion problem but the people of Sukhdebpur and Sreemantapur (downstream portion) are facing the problem because the Dubail regulator is not working properly. Water recedes slowly from the regulator due to sedimentation of the khals.

Impact
The drainage in the project area has been slowed down as well as impeded in the downstream area due to the interventions of the project.