IC52Rational
Plugin ID: 5114
Peak flow calculator using the IC 5.2-IC Rational Method (Spanish Road Drainage Standard, Chapter 2). Computes QT for T=2, MCO, 5, 10, 25, 50, 100 and 500 years with full traceability. P0i from CLC layer. Excel export included.
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IC52IC_Racional implements the full IC 5.2-IC rational method (Norma 5.2-IC, Capítulo 2) for surface drainage design of Spanish roads and infrastructure.
Features:
- 8 simultaneous return periods: T=2, MCO(≈2.5 interp.), 5, 10, 25, 50, 100, 500 years
- Full formula chain: KA, tc, Fa, Fb, Fint, I(T,tc), C, Kt, QT
- Heterogeneous catchment support (§2.2.4): Σ[Ci·Ai]
- P0i automatic calculation from CLC layer (Table 2.3, same approach as CLC2Manning)
- Regional β corrector from Table 2.5 (all regions) with log-linear FT interpolation
- Contextual ArcGIS Online maps: β regions (Fig. 2.9) and hydrological groups (Fig. 2.7)
- Pd automatic calculation from P_media and Cv (DGC table, linear interpolation)
- Levante/SE method §2.3 for regions 72, 821, 822 with T>25 years
- Excel export with colour-coded results table
- QGIS 4.0 / Qt6 only
