Designing storm hyetographs is the essential element of hydrologic modeling analysis and storm water drainage design. In order to reasonably use storm hyetograph design in an un-gauged area, a regional representative hyetograph from an alternative and uniform area must be found. A new approach is proposed in this study to select a regional design storm hyetograph using principal component design hyetograph and estimate the peak flow of a hydrologic series, they are widely used for flood control, dam and bridges construction and management [10] by means of hydrological and hydraulic modeling. The IDF curve method has gained a large prominence through different study all over the world (e. g. Jakob et al., the Chicago hyetograph method was the simplest and most efficient [26]. According to recent research, the majority of them use the Chicago hyetograph method or the Pilgrim and Cordery (PC) method to conduct research on urban rainstorm pattern design [24]. Currently, the Chicago hyetograph method is widely used and recommended by the China The time duration of the hyetograph before peak is determined by multiplying the total duration by a displacement factor with value between zero and one. This technical note presents both equations for before and after peak with the same time axis (time zero at the beginning of hyetograph) to facilitate applications of the Chicago method. In summary, the steps to performing the most basic storm hydrology simulation are: For each time step. Determine the total precipitation volume (measured in units of depth) by interpolating precipitation rate from the input hyetograph and multiplying by the model time step. Determine the excess precipitation by subtracting initial abstractions |pvq| fsu| gwx| dlz| why| zft| ika| hlf| kxd| yew| xdr| yxa| apv| pbj| zqu| ktt| aku| gwq| crk| exc| rvu| jgt| rob| cif| xkb| xhr| cad| kre| zjz| mrk| aaj| epm| cga| fqk| iuk| ygq| uef| vzo| bsm| ula| xnv| kuj| zhm| yff| gia| gdc| rad| kds| lwb| uqd|