Halda is the only river in the country that originates and ends in Bangladesh. Halda River is one of the most important natural carp spawning grounds in Bangladesh and has long been the major source of naturally produced carp fish for pond culture in much of the country. It originates from the hill range of Khagrachari and flows over three Upazillas of Chittagong district—Fatikchari, Hathazari and Raozan Upazillas, before finally falling into the river Karnafuli Halda is an important river from ecological perspective. A number of hydro-morphological and environmental factors had made the Halda river a favorable place for spawning of brood carp .Approx. 250-500 fish egg collectors are dependent at the river edge. Part-time collectors and helpers of 500 more on this profession. By fertilizing eggs and dying fish, Halda contributes 800 core in four phases annually to our national economy. Mother fish take refuge in the bend of the river.
Currently, these bends are being cut due to natural and man-made reasons, due to which the biodiversity of the river is now under threat. Due to a lack of awareness, negligence, and adequate knowledge among people, they are killing mother fish. as a result, the amount of fish egg collection is decreasing day by day, which is having an adverse effect on our national economy.
This initiative aims to raise locals' awareness of the value of the river, urge them to protect it, boost fish egg collecting, and establish a platform for understanding the river's biodiversity. The project was chosen to attend. physical implementation of a built mass, and also think beyond and address the more critical factors of the conservation of the natural heritage, generate knowledge on an asset of this country, and mold out a new economic advantage with tourist activity and a development that will help in setting a vision for the whole of the river edge.

The design process has been layered up into four phases.
1. Hydrological layer: To allow the motherfish to take refuge there, the width of the sonaichor and kagotia ox bends has been extended in this layer.
2. Ecological Layer: A forest has been designed to prevent the river erosion along the river bank. Besides, locally available trees have been proposed for the forest.
3. Cultural Layer: The number of fish collected will increase and the residents' interest in working in this industry will grow if the river bend is able to recover. "Halda Pada" is a song they sing specifically when they gather the fish. These songs that have been discontinued will be resurrected if the egg collection grows.
4. Economical Layer: If the river bend is able to recover, the number of hatcheries will increase, and the amount of egg collection will rise, which will contribute to our national economy.

As the Halda River is erosive. The river bank is designed in a layer of height. Different types of trees have been proposed here to prevent the erosion. This has been designed given how erosive the Halda River is. The riverbank has a layer of height in its design. I inspired the Kongjian sponge plant theory, which uses a very simple tool to transform the landscape from the slope to the delta. Such as terracing, ponding, dying, ponding, and islanding to create landscapes that are productive, sustainable, beautiful, and have biodiversity. So that I create a Retention ponds and terraced wetlands were constructed to lower peak water flow and control seasonal rainfall. The native farming methods, which catch and hold water to convert steep slopes into fertile fields, served as the model for the terraces. Here, several tree species have been suggested to stop erosion. This was created taking into account the three seasons as well as the highest and lowest water levels. In addition to planting trees, wood and geotextile bags have been used to support the bank. Riverside Trees and Herbs that Prevent Erosion.

There are two zones in this project—the quiet zone and the noisy zone—in the master plan. The "River Port Demarcation Act of 2004" prohibits the construction of any structures 150 feet or less from the river. As a result, interpretation has been made in a calm area at the Kagotia River Bend, 600 feet from the river. People can learn about the significance and health of the river from the interpretation center. . The region has been designated as a forest this forest's goal is to improve the surrounding ecosystem. Due erosive the Halda River The riverbank has a layer of height in its design. Here, several tree species have been suggested to stop erosion. Considering how erosive the Halda River is, this was designed. The architecture of the riverside includes a layer of height. Here, it has been suggested that a number of tree species inhibit erosion. The three seasons and the highest and lowest water levels were considered when creating this. If individuals are still interested in training and research after visiting the interpretation center, they can visit the research and training center.IT has been design 350 feet away in the noise zone .The river was intended to be crossed by a bridge. An additional rationale for designing the bridge is to prevent river traffic from disturbing the fish population. Locals will not be able to access the bridge during the breeding season. The only people with access to the bridge will be the researcher, the trainer, and the egg collector. The roof of my project is inspired by the curved designs of traditional rural Bengal, crafted to safeguard the riverside area from storms and heavy rains