Dimensionless Rainfall Curves for Brazil (2000–2024): Empirical Huff Quartiles and Global Beta Parameters

Derived pointwise empirical dimensionless cumulative rainfall curves for 2,346 station–Huff-quartile combinations from 167,153 selected hourly rainfall events recorded at 597 INMET stations (2000–2024), together with four global Beta parameter pairs. The collection contains aggregated derived data rather than original hourly rainfall observations. Related manuscript: Temporal Rainfall Patterns in Brazil: Beta-Based Curves Compared with the Huff Method (RBRH-2026-0072, under revision).