Surface water trends in India's rivers and basins

This repository contains Google Earth Engine code behind the analysis for our publication on surface water area trends for rivers and basins in India. This is work done in collaboration with Suman Jumani.

To reproduce our analysis, follow these steps:

1. Create season-wise annual composites of surface water occurrence history, by running MakeSeasonalComps.js.
2. Delineate transects across rivers, by first running FindTransectLocations.js to find their locations along the river channels and then running MakeTransects.js to delineate transects across them. Delineations of basins around rivers are publicly available, and can be chosen from, the HydroBASINS dataset. We used level 7 basins in our analysis.
3. For these basins and transects, calculate time series of surface water areas using the annual composites from 1. above, by running TxBasinSeasWaterTsExp.js.
4. Estimate trends, by season, in annual surface water area changes for each basin and transect by running TimeseriesRegr.js.
5. Export results of trend estimation and timeseries of surface water areas, for use in a local machine, or as deposited in the Zenodo data repository, by running ResultsExports.js.

License

This work is licensed under the creative commons license CC-BY-SA-4.0.