This comprehensive mathematical model can help to understand flow of large braided rivers like Brahmaputra, providing valuable insights to field engineers to design sustainable hydraulic structures like Spurs, Revetment and other river bank protection measures.

Prediction

Predicting river flow variations across depth is crucial for flood and erosion control, agriculture and water supply intake design, and zero head energy production, say sources from IIT Guwahati.

However, existing models provide only average velocity, underestimating undercurrents at different depths, say IIT Guwahati researchers.

In braided rivers, the presence of sandbars further complicates accurate three-dimensional velocity computation.

Model

Speaking about the BRAHMA-2D model, Prof Arup Kr Sarma, Department of Civil Engineering, IIT Guwahati, said their mathematical model combines highly complex mathematical modelling with challenging field-based research on large braided rivers.

With this quasi-3D river flow model, we can understand how fast the water moves at different depths inside a river and its circulation around a structure like a spur installed for prevent river bank erosion, said Prof Arup of IIT Guwahati.

Integration

BRAHMA-2D integrates a two-dimensional model of water movement with a theory about entropy, a measure of disorder or randomness, say sources from IIT Guwahati.

The research also delves into how features like river banks, spurs, and sandbars affect the way water moves.

Specifically, it observes a dip phenomenon near spurs where the flow of water underneath increases, a phenomenon absent in points away from these structures.

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The award ceremony took place on 21st December 2023 at the Hydro-2023 conference hosted at NIT, Warangal. The paper has been co-authored by Prof Arup Kr Sarma and his former research scholar Dr Anupal Barua.

Validation

The model was successfully validated on the Brahmaputra River near Majuli Island, the second largest freshwater river Island in the world, prone to river bank erosion, say sources from IIT Guwahati.

Application

Dr Anupal Baruah, at present working as post-doctoral fellow at the University of Alabama, USA, highlighted the model’s successful application with the river survey data.

It uses GPS Echo-Sounder for depth and Acoustic Doppler Current Profiler, along with current meters for velocity measurement.

He emphasized, “During my research at IIT Guwahati field measurements near the spurs revealed a strong agreement with our model results.

The versatile model has further helped to design bioengineering methods for controlling river bank erosion, say sources from IIT Guwahati.

It has also been applied to understand habitat suitability of aquatic species, especially endangered species, based on the availability of required depth and flow velocity.

This breakthrough can now be applied to compute the vertical velocity profile at any desired location, say sources from IIT Guwahati.

IIT Guwahati

Indian Institute of Technology Guwahati, established in 1994, completed 25 years of glorious existence in 2019.

At present, the Institute has eleven departments, nine interdisciplinary academic centres and five schools covering all the major engineering, science, healthcare, management, and humanities disciplines.

It offers BTech, BDes, BSc(Hons), MA, MDes, MTech, MSc, MS(R), MBA and PhD programmes. The institute offers a residential campus to 439 faculty members and more than 8,600 students at present.

As it is known, that IITs are not only known for providing engineering courses, they are also known for providing bachelor’s course in architecture, which is popularly known to all as BArch.

Post applying for AAT, students have to appear for the test and pass it with required qualifying marks, to do this one needs to prepare well for the test, this is where AAT 2025 preparation strategy comes into the picture.

All those who are keen on passing AAT this year can focus on AAT 2025 preparation strategy, which is mentioned below for the sake of the students:

Exam pattern

The key to success always lies in the beginning, no wonder, why the saying was born that good beginning is half won. Students must first know how the AAT exam is conducted if they are to prepare a well-established study plan. Exam pattern is below:

The test consists of three sections:

1. Mathematics: 30 questions
2. Drawing: 2 questions
3. General Aptitude: 40 questions

The total duration of the exam is 3 hours.

Creating an AAT 2025 Preparation Strategy

To develop an effective AAT 2025 preparation strategy, follow these steps:

1. Set realistic goals: Break down your study material into manageable chunks, and set achievable goals for each study session.
2. Identify your weaknesses: Focus on improving your weak areas, and allocate more time to those subjects.
3. Allocate time wisely: Divide your study time into three sections: Mathematics, Drawing, and General Aptitude.

Study Materials for AAT 2025 Preparation Strategy

To aid your AAT 2025 preparation strategy, utilize the following study materials:

1. NCERT textbooks: Focus on NCERT textbooks for Mathematics and General Aptitude, as they provide a solid foundation.
2. Reference books: Supplement your NCERT textbooks with reference books like RS Aggarwal, SL Loney, and OP Tandon.
3. Online resources: Utilize online resources like Khan Academy, Unacademy, and BYJU’S for additional study materials.

Practice and Revision for AAT 2025 Preparation Strategy

Practice and revision are crucial components of AAT 2025 preparation strategy. Follow these tips:

1. Take mock tests: Regularly take mock tests to assess your knowledge, identify weak areas, and improve your time management skills.
2. Practice previous year’s papers: Practice previous year’s papers to get familiar with the exam pattern and question types.
3. Create revision notes: Create concise revision notes for each subject, highlighting key concepts and formulas.

1. Create a schedule: Plan out your study schedule in advance, allocating specific times for each subject.
2. Use time-blocking: Divide your study time into focused blocks, eliminating distractions during each block.
3. Take breaks: Take regular breaks to avoid burnout and maintain a healthy work-life balance.

Staying Motivated for AAT 2025 Preparation Strategy

Staying motivated is crucial for AAT preparation strategy. Follow these tips:

1. Remind yourself of your goals: Keep your goals in mind, and remind yourself why you’re working towards AAT 2025.
2. Celebrate small victories: Reward yourself for small milestones achieved during your AAT 2025 preparation strategy journey.
3. Seek support: Surround yourself with supportive friends and family, and consider joining a study group for motivation.

Final Tips for AAT Preparation Strategy

1. Stay consistent: Consistency is key to success in AAT 2025 preparation strategy.
2. Practice under timed conditions: Practice solving questions under timed conditions to improve your speed and accuracy.
3. Stay positive: Maintain a positive attitude throughout your AAT 2025 preparation strategy journey.

By incorporating these final tips into your AAT 2025 preparation strategy, you’ll be well on your way to achieving success.

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