Study of Four Rainstorm Design Methods in Chongqing

Abstract

Based on minute-by-minute precipitation data from 1961 to 2016 obtained from the National Basic Weather Station of Shapingba, Chongqing, China, the Chicago rainstorm method, the Pilgrim & Cordery (P&C) method, the Common-frequency method and the natural rainstorm moving regularity (NRMR) method were used to design short-duration (1–3 h) and long-duration (24 h) rainstorm hyetographs. Then, a standardization method for test samples was designed to ensure that each test sample was standardized and underwent an actual precipitation process. The designed rainstorm hyetographs and test samples were compared and analyzed, and the results show that the hyetographs for the 1, 3, and 24-h durations obtained with the NRMR method best represented the actual corresponding precipitation processes. The hyetograph for the 2-h duration obtained with the Chicago rainstorm method was best for the actual 2-h precipitation process. The design results of the Common-frequency method were generally good, but not outstanding. Finally, the P&C method showed a relatively poor performance for each duration.

Probabilistic assessment of failure of infiltration structures under model and parametric uncertainty

“…While the uniform hyetograph is constant across the temporal window within which it is defined, the Chicago model considers an initial period of growth of the rain intensity until a peak value is attained (at time t p [T]), which is then followed by a decrease of rain intensity. The peak time can be formulated as a fraction of the rain event duration, i.e., t p = rd, with 0 < r < 1 and usually ranging between 0.3 and 0.5 (e.g., Liao et al, 2021).…”

Exploring the Sensitivity Range of Underlying Surface Factors for Waterlogging Control

“…In China, the Chicago hyetograph method is widely employed in the planning and design of drainage systems and is recommended as a design rainfall method in the "Outdoor Drainage Design Standards" [28]. It has been extensively validated and is considered the most commonly used design rainfall method in China [29]. To explore the sensitive factors of waterlogging under various rainfall conditions, this study utilized the Chicago hyetograph method to provide rainfall input data.…”

A New Method for Selecting the Geometry of Systems for Surface Infiltration of Stormwater with Retention

“…Furthermore, considering that the intensity of rainfall is increasing due to climate change [10,11], waterlogging [12] and flooding [13] are becoming increasing threats. These phenomena can have negative socioeconomic impacts and, in some cases, even lead to the death of residents [14]. Therefore, it is not surprising that there is a growing interest in managing water in the circular economy model.…”