Volcanic-arc rock weathering in Puerto Rico

<p>This dataset concerns watershed-scale hydrology, erosion, and weathering in 30 tropical, montane watersheds in Puerto Rico that are underlain by volcanic-arc rocks (with a modal composition of basaltic andesite). The dataset comprises watershed locations and physical characteristics, wet and dry season water quality data, sediment geochemistry and derived weathering indices, estimated specific discharges and solute fluxes, cosmogenic <sup>36</sup>Cl derived erosion rates, and soil order data. All data types are available in 27 of the 30 study watersheds. This dataset was collected between 2020 and 2022 (although includes a single sample from 2019) to study the factors that control volcanic-arc rock weathering rates in the humid tropics.</p>

<p>In addition, a compilation of discharge data from USGS stream gauges in Puerto Rico and watershed-averaged precipitation rates in the gauged catchments are included. These data are used to generate rainfall-runoff relationships and estimate specific discharges in the study watersheds, which are mostly ungauged.</p>

<p>The dataset is presented in 10 tables that are included in a single excel file (.xlsx). In addition, <i>GNU Octave</i> code packages to determine watershed-averaged nucleonic scaling factors, calculate erosion rates from Cl isotope ratios, target chemistries, and watershed-averaged scaling factors, and to calculate York regressions between weathering and erosion data are included. This dataset was produced with support from NSF-EAR-2011358 and NSF-EAR-2011342. </p>