Global Estimation of Reach-scale Bankfull Depth in Alluvial Rivers

This dataset provides estimates of bankfull depth for global alluvial river reaches (~2.27 million km). Bankfull depth represents the cross-sectionally averaged flow depth at the bankfull stage. We estimate global river bankfull depth using an XGBoost regressor that utilizes bankfull discharge data from the Global River BankFull Discharge (GQBF) dataset, which is based on the Global River Topology (GRIT) network, together with 11 environmental and geomorphic predictors. Attribute description Name Data type Description domain text catchment group, see domain index file segment_id integer global segment ID of reach cat integer domain internal feature ID reach_id integer global river reach ID, same as FID catchment_id integer global catchment ID upstream_node_id integer global reach node ID at upstream end of line downstream_node_id integer global reach node ID at downstream end of line upstream_line_ids text comma-separated list of global river reach IDs connecting at upstream end of line downstream_line_ids text comma-separated list of global river reach IDs connecting at downstream end of line length float length of reach in m sinuousity float ratio of line length and Euclidian distance between upstream-downstream nodes, i.e. 1 meaning a perfectly straight line qbf float the estimated bankfull discharge for each reach (m3/s) drainage_area float the upstream accumulated drainage area (km2) strm_order float stream order annual_mean_flow float annual mean flow (m3/s) annual_mean_precip float annual mean precipitation (mm) lai float leaf area index aridity_index float aridity index (P/PET) elevation float elevation (m) slope float reach average slope ndvi_mean float mean normalized difference vegetation index (NDVI) bfd float bankfull depth (m) bfw float bankfull width (m) wd_ratio float bankfull width-to-depth ratio cv_bfw float coefficient of variation of bankfull width cv_bfd float coefficient of variation of bankfull depth