适用于海绵城市规划建设的北京城市副中心降水特征研究

doi:10.3969/j.issn.1673-503X.2023.03.018

Abstract

Abstract:

Based on precipitation data from the meteorological observation stations, the temporal and spatial variation characteristics of daily precipitation in the area where the Beijing municipal administrative center is located were analyzed.The short duration rainstorm intensity formula suitable for Beijing municipal administrative center was compiled.Finally, the control target index for the construction of a sponge city in the sub-center, the total annual runoff control rate, was calculated.The results show that the annual variation of precipitation in the research area is large, the difference between the maximum precipitation and the minimum precipitation can reach 684.0 mm, and the annual precipitation distribution is uneven.The precipitation from June to September during the flood season (415.3 mm) accounts for 75% of the total precipitation in the whole year.The diurnal variation of precipitation, intensity, and frequency during flood season is a single peak pattern, and the distribution characteristics of precipitation and precipitation intensity are consistent.The main peak value appears at 22:00, the main valley value is at noon, the main peak value of precipitation frequency appears at 04:00, and the main valley value appears at 14:00.The multi-year variation trend of precipitation and intensity is consistent at most times, showing the characteristics of increasing and strengthening in the early morning and afternoon, and decreasing and weakening in the morning, noon and night.In terms of spatial distribution, most of the precipitation peaks in the north of the Beijing municipal administrative center occur at night, and most of the precipitation peaks in the south occur in the early morning.Comparing the results of the new rainstorm intensity formula with the current one, we can conclude that the larger the return period, the greater the precipitation intensity corresponding to the new formula.The new formula is more suitable for the design and construction of a sponge city under the background of frequent extreme precipitation in the future.When the control index of sponge city construction, the total annual runoff control rate, is 80% and 85%, the corresponding designed precipitation is 27.6 mm and 33.9 mm.

Key words: Daily variation of precipitation, Rainstorm intensity, Annual total runoff, Control rate

CLC Number:

P457.6

Ruo-zi YANG,Chun-yi XUAN,Ji WANG,Wu-peng DU,Hua WANG. Study on precipitation characteristics of Beijing municipal administrative center suitable for sponge city planning and construction[J]. Journal of Meteorology and Environment, 2023, 39(3): 154-160.

Figures/Tables 8

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Table 1

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时长/h	重现期/a
时长/h	2	3	5	10	20	30	50	100
5 h	1.95	2.18	2.44	2.77	3.08	3.26	3.48	3.78
10 h	1.61	1.82	2.05	2.34	2.61	2.77	2.97	3.24
15 h	1.39	1.58	1.8	2.06	2.32	2.46	2.65	2.89
20 h	1.23	1.4	1.6	1.84	2.08	2.21	2.38	2.61
30 h	0.98	1.14	1.31	1.53	1.74	1.86	2	2.21
45 h	0.76	0.88	1.02	1.2	1.37	1.47	1.59	1.75
60 h	0.63	0.74	0.87	1.03	1.18	1.27	1.38	1.53
90 h	0.48	0.58	0.69	0.83	0.96	1.04	1.13	1.26
120 h	0.38	0.47	0.56	0.68	0.79	0.85	0.93	1.04
150 h	0.33	0.4	0.48	0.59	0.69	0.74	0.81	0.91
180 h	0.29	0.35	0.42	0.51	0.59	0.64	0.7	0.78

重现期/a	2	3	5	10	20	50	100
平均差值/(mm·min^-1)	0.00	0.00	0.01	0.02	0.03	0.04	0.05

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Study on precipitation characteristics of Beijing municipal administrative center suitable for sponge city planning and construction

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