Description Usage Arguments Details Value
Compute performance statistics (regression R2 and sMAPE) for WaterGAP v2.2 discharge predictions of long-term mean discharge and Q90 against observed discharge at GRDC gauging stations with ≥20 years of streamflow data.
1 | eval_watergap(in_qstats, in_selgauges, binarg)
|
in_qstats |
data.table of discharge statistics for GRDC streamflow gauging stations. Each row corresponds to a single station. Output from comp_GRDCqstats. |
in_selgauges |
data.table or data.frame of gauging stations to analyze. |
binarg |
discharge bin limits to divide performance statistics asssessment by (to create size classes based on long-term mean annual flow in m3/s). |
gauging stations to analyze in_selgauges
are further subsetted
to keep only those with at least 20 years of daily discharge data.
This function performs a log-log regression across all gauges and non-log regressions for each size class to compute R2.
This function was used to produce Table S1 in the Supplementary Information of Messager et al. 2021
data.table of performance statistics by streamflow size class for mean annual flow and Q90.
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