Pairing Remote Sensing and Clustering in Landscape Hydrology for Large-Scale Changes Identification. Applications to the Subarctic Watershed of the George River (Nunavik, Canada). Dataset and Code. ...

• Main Authors: Sicaud, Eliot, Fortier, Daniel, Dedieu, Jean-Pierre, Franssen, Jan
• Format: Dataset
• Language: English
• Published: Zenodo 2023
• Subjects: landscape hydrology; remote sensing; clustering; Subarctic watershed; Arctic greening; Arctic Greening; Arctic; Subarctic; Nunavik
• Online Access: https://dx.doi.org/10.5281/zenodo.10223402; https://zenodo.org/doi/10.5281/zenodo.10223402

For remote and vast northern watersheds, hydrological data are often sparse and incomplete. Landscape hydrology provides useful approaches for the indirect assessment of the hydrological characteristics of watersheds through analysis of landscape properties. In this study, we used unsupervised Geographic Object-Based Image Analysis (GeOBIA) paired with the Fuzzy C-Means (FCM) clustering algorithm to produce seven high-resolution territorial classifications of key remotely sensed hydro-geomorphic metrics for the 1985-2019 time-period, each spanning five years. Our study site is the George River watershed (GRW), a 42,000 km2 watershed located in Nunavik, northern Quebec (Canada). The subwatersheds within the GRW, used as the objects of the GeOBIA, were classified as a function of their hydrological similarities. Classification results for the period 2015-2019 showed that the GRW is composed of two main types of subwatersheds distributed along a latitudinal gradient, which indicates broad-scale differences in ...