Geomorphic Changes from Hydropower Projects on the Nagavali River, India

Two case studies of hydropower projects on the Nagavali River in India, analyzing anthropogenic impacts on fluvial processes. The dataset includes Google Earth images from different time periods and analyzed hydrological, meteorological, and geologic data from government sources and field studies. Shreya Bandyopadhyay published this research on figshare under a CC-BY-4.0 license.

Use Cases

• Assessing river avulsion and channel shift based on satellite imagery time-series analysis.
• Quantifying reservoir expansion and channel widening from backwater effects post-construction.
• Evaluating land loss and geomorphic instability triggered by flash flood events.

Strengths

• Includes specific, quantified geomorphic changes: a 550 m channel shift, 45 m incision, and 0.54 km² land loss at one site.
• Documents reservoir expansion from 1.39 km² to 9.91 km² within nine years at another site.
• Uses multi-source data including satellite imagery, government data, and field studies.

Limitations

• Dataset size is 455.1 KB, indicating a very limited scope focused on two specific sites.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for statistical modeling.

Provenance

Source

figshare, authored by Shreya Bandyopadhyay.

Collection Method

Data collected from Google Earth images, government sources, and detailed field study.

Time Range

Covers periods before and after dam construction, with specific events in 2006, 2017, and 2020.

Freshness

Last updated 2026-05-14 07:28:50; freshness should be verified.

Geography

Nagavali River basin in the Indian states of Odisha and Andhra Pradesh.