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Evaluating water availability and flow characteristics for Dikrong river in Arunachal Pradesh using Acoustic Doppler Current Profiler

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Abstract

The Dikrong river, which flows through Arunachal Pradesh and Assam, holds vital importance for local communities. However, a comprehensive study on this river has been lacking for this river system. To bridge this gap, an extensive investigation for sustainable regional development and effective water resource planning in the Dikrong river basin was carried out based on Acoustic Doppler Current Profiler (ADCP), historical data analysis and Land Use/Land Cover (LULC) change analysis. The study highlights the effectiveness of ADCP's in accurately assessing various river parameters, including bathymetry mapping, current profiling, discharge measurements, and three-dimensional velocity profiling. The results indicate diverse flow patterns at different locations during low river discharge, highlighting the importance of understanding these patterns for efficient river ecosystem management. By utilizing ADCP data, the flow patterns and discharge characteristics are investigated across various transects that reveal a distinct discharge surge, particularly in the mid-section. However, varied flow velocities between river banks and the mid-section highlight the river's intricate behaviour. The historical flow patterns were examined to get insights into flow characteristics. Although historical data indicated a downward discharge trend for monthly peak flood, this is possibly due to climate change and land use alterations. Further, employing machine learning techniques (Support Vector Machine, Google Earth Engine), the study assesses LULC changes, revealing declining forest cover and increasing settlements and agriculture/barren land. Finally, it presents a comprehensive analysis of flow dynamics, water availability, erosion-prone zones, and high-risk areas along the river.

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The datasets generated during and/or analysed during the current study are available from the corresponding author upon reasonable request.

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Acknowledgements

The authors thankfully acknowledge the Department of Science and Technology, Ministry of Science and Technology, Government of India for providing financial support. Infrastructural support to carry out the investigation was provided by the North Eastern Regional Institute of Science and Technology, Arunachal Pradesh, India.

Funding

Funding for this research was received from the Department of Science and Technology, Ministry of Science and Technology, Government of India.

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Contributions

Conceptualization, G.G. and R.K.P; methodology, G.G. and R.K.P; software, G.G., J.D. and S.M.; validation, G.G. and R.K.P; formal analysis, G.G., J.D. and S.M.; investigation, G.G., J.D. and S.M.; resources, G.G. and R.K.P; data curation, G.G., and J.D.; writing—original draft preparation, G.G.; writing—review and editing, R.K.P; visualization, G.G. and R.K.P; supervision, R.K.P; project administration, R.K.P.

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Correspondence to Ghritartha Goswami.

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Goswami, G., Darang, J., Prasad, R.K. et al. Evaluating water availability and flow characteristics for Dikrong river in Arunachal Pradesh using Acoustic Doppler Current Profiler. Sustain. Water Resour. Manag. 10, 103 (2024). https://doi.org/10.1007/s40899-024-01082-7

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  • DOI: https://doi.org/10.1007/s40899-024-01082-7

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