online_conceptual_overland:   Calculation of conceptual dimensionless overland flow hydrographs (1 ≤ m ≤ 3) References • Ponce et al., 1997:  Generalized conceptual modeling of dimensionless overland flow hydrographs. • Ponce, V. M., 2014:  Engineering Hydrology, Principles and Practices, Chapter 4, Section 2. ⇐  Rising limb Receding limb  ⇒ INPUT DATA:            [Sample input]                       Watershed / ID (optional):   Select units:     SI U.S. Customary     (SI units) (U.S. Customary units) Select formula:     [0]  All formulas [1]  Linear (m= 1) [2]  Chezy (m= 3/2) [3]  Manning (m= 5/3) [4]  Horton (m= 2) [5]  Izzard (m= 3) Select hydrograph:     A.  Rising B.  Receding C.  Both rising and receding [Numbers within square brackets indicate that this input is required for the selected formula] Length L  [0,1,2,3,4,5]  (m) (ft):    Slope So  [0,1,2,3,4,5]  (m/m) (ft/ft):    Effective rainfall intensity i  [0,1,2,3,4,5]  (mm/hr) (in/hr):    Manning friction coefficient n   [0,1,2,3,4]:    Water temperature T  [0,5]  (oC) (oF):    OUTPUT/RESULTS: q /qe t /te q t 0 0 0 0   Your request was processed at  09:08:54 am on February 20th, 2026   [ 260220  09:08:54 ]. Thank you for running   online_conceptual_overland   Please call again.   [150818]