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Canal

There are two canals in this union

01. Madam Parbatinagar canal

02. Dobar canal

The Madam-Parbatinagar canal flows through this union which joins the Rahmatkhali canal and there are no rivers or tributaries in this union.

 

Rivers are usually born from streams, glaciers, or natural changes in highlands or mountain passes. A kind of tremendous speed is transmitted to the water rushing at high speed from the mountains thousands of feet high. This fast-moving stream of water is known as a river when it crosses land. His youth when the river flows in hilly areas. During this time the river carries out extensive excavations and extracts gravel, sand, silt, etc. from the source and throws them into the sea very easily. Rivers have been eroding the earth's surface for so long. His work ends when all the river basins have been eroded into plains or almost plains. This work of the river from the source to the estuary is divided into three stages.

River youth [ source ]

In this condition the main function of the river is erosion and carrying. Usually the hilly condition is the youth of the river. At this time the river carries big stones. The friction of these stones erodes the bottom of the river and creates big holes. River erosion in the highlands has resulted in canyons, canyons and waterfalls.

River maturity [ source ]

In this condition the river is a little stagnant. As a result, the speed and carrying capacity of the river also decreases. Usually when the river enters the middle or valley, it refers to the mature state. In this condition canyons, rapids, waterfalls etc. are no longer seen. The height of the mountains and the watershed between them is also lower than before.

River aging [ source ]

In this condition the erosion capacity of the river is greatly reduced. However, the demolition work was short-lived. This condition of the river is usually in the plains. It may have high ground somewhere. At this time the speed of the river decreases so much that the river changes its course whenever there is a slight obstruction. The river is very winding in this part. Along the way creates a horse-shaped lake. In this condition the river often causes floods on both banks during the monsoon season. The water of the river spreads around. As a result, sand and silt spread on both shores. Char also rises in the chest of the river. However, rivers do not always flow like this. Occasionally earthquakes can rejuvenate a river. Apart from this, other reasons can also increase the intensity and speed of the river.
If the ground movement takes a massive shape, it is transmitted to the oasis. This created new mountains. There are a number of rare rivers in the world that have continued to erode the power of the rising mountains and have been able to maintain their existence even after the rise of the mountains. ঐ All rivers are called foreground rivers. For example, Colorado, Indus and Brahmaputra can be named. Colorado flowed there long before the Rocky Mountains and the Indus and Brahmaputra rivers upstream of the Himalayas. [1]

Types of rivers [ edit ]

The main rivers are usually springs from glaciers, such as the Padma Gangotri Glacier. The  tributary originates from another river. Such as the tributary river of Buriganga Dhaleshwari. Tributaries  usually merge and flow into other rivers, such as the  Atrai River . A major river can be a tributary of another river. Again, this stream is divided into two parts on the basis of masculine and feminine words. The streams whose names are feminine are called rivers. Their names are long-voiced. Such as: Meghna, Jamuna, Karnafuli, Kushiyara etc. The streams whose names are masculine are called rivers. Their name is Hrasvasvara Karanta. Such as: Kopotaksh, Brahmaputra, Nile river etc. However, this rule applies to all rivers whose names are mythical.

Geographical knowledge and mathematical formulas of the river [ source ]

The source of the river is usually a high-altitude mountainous region, where icy water and rainwater form a strong gravitational current along a slope. The periodic integrated process of multiple small streams erodes the mountains and creates rivers.
The stages are (Holmes, 1951)
Patprabha-Mihinali-Shiranali-Guhanali-Nadi valley. In fact, erosion at the source of rivers flows through a number of regulators, such as-

E = F (S +, Q +, V +, R-); When-
E =
Erosion F = F =
S = Land Slope
Q = Flowing
V = Flowing
R = Friendliness and Hardness

It is easy to assume that the reaction and influence of those favorable and unfavorable regulators are essential behind the creation of a river. Again the flow and erosion of the river are proportional to each other but the flow velocity, the slope of the basin is dependent on the topography, which according to the equation of geologist Chazi
is- V = CVRS; While-
V = prabahagati
S = slope of the ground
R = ground roughness and silakathinya
C = constant

The structure, stage, nature and function of any river are constantly evolving. These stages of transformation are comparable to a living organism according to the 'organic concept'. There are three main stages of the river from beginning to end-

Young →
Mature → Old Erosion → Transport → Storage

The source of the major rivers flowing over Bangladesh is the Himalayas. Ice water and rain water flow in a spiral speed from north to south. Their destination is the Bay of Bengal. [1]

Rivers of Bangladesh [ source ]

Bangladesh is said to be the land of thousands of rivers. However, the Bangladesh River Research Institute does not have the exact number of rivers in Bangladesh. Where all the rivers originated and ended or where one river crossed another river is still unknown to man. According to many researchers, the total number of tributaries and tributaries in Bangladesh is 225. However, there is considerable disagreement among researchers as to the total number of rivers, tributaries and tributaries. Numerous rivers have been created from one river. Again, some rivers have created canals or rhymes. These also include natural rivers. Such as- Karnafuli river. At least 24-25 small tributaries have joined this river from the estuary to Kaptai dam. From this calculation, Bangladesh can be called the land of a thousand rivers. Jessore, Khulna, Barisal, There are numerous rivers in Patuakhali. The naming of these rivers was not correct. Again, different names of different parts of some rivers. The five main rivers of Bangladesh are Padma, Meghna, Jamuna, Pashur and Karnafuli. Then come the names of rivers like Teesta, Gorai, Madhumati, Rupsa, Arial Khan, Kumar, Atrai, Kirtankhola, Bishkhali etc. It is difficult to say which of these rivers is bigger or smaller. However, experts estimate that there are at least 600 rivers in Bangladesh.[১]

The role of the life and livelihood of the river [ Source Edit ]

Every city, port, ganj, bazaar etc. of the world has developed around the river. Boats are an easy way to transport and communicate goods. A pair of boats at a very low cost to transport goods. The one who sails the boat is identified as the boatman. Once upon a time there were sailing boats. Engine-powered boats have taken its place in the evolution of time. In the middle of the river, fishermen fight the waves and catch fish. On the banks of the river, the leaseholders are seen collecting money as tax.

Rahmatkhali canal flows by the side of this union.