Runoff Changes and Attribution Identification in the Upper Reaches of Minjiang River in Recent 59 Years

Runoff Changes and Attribution Identification in the Upper Reaches of Minjiang River in Recent 59 Years

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Qian CHEN^a^,^b, Xiao-zhang LEI^a^,^b, Yin-yin ZHANG^a^,^b

Water Resources and Power | 2023, 41(3) : 10 - 13

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Water Resources and Power | 2023, 41(3): 10-13

• HYDROLOGY，WATER RESOURCES AND ENVIRONMENT •

Runoff Changes and Attribution Identification in the Upper Reaches of Minjiang River in Recent 59 Years

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Qian CHEN^a^,^b, Xiao-zhang LEI^a^,^b, Yin-yin ZHANG^a^,^b

Affiliations

^a.College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China

^b.State Key Laboratory of Hydraulics and Mountain River Protection, Sichuan University, Chengdu 610065, China

Published: 2023-03-25 doi: 10.20040/j.cnki.1000-7709.2023.20221672

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Abstract

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In order to efficiently utilize water resources in the upper reaches of the Minjiang River Basin, based on hydro-meteorological data of the basin from 1960 to 2018, a variety of statistical theories were used to analyze the trend, cycle and abrupt point of runoff. The elastic coefficient method based on Budyko theory (Choudhury-Yang formula) and the comparative method of cumulated slope change rate (SCRCQ method) were used to analyze the attribution of runoff changes. The results show that the runoff decreases significantly at a rate of 12.5 mm/10a, and a sudden change occurred in 1993. There are 3 years, 8 years, 12 years and 18 years main cycles of runoff change, and the annual distribution is uneven, mainly concentrated in summer and autumn, accounting for 73.6%. Rainfall is the most sensitive to runoff, followed by underlying surface parameters, and potential evapotranspiration is the least sensitive. Choudhury-Yang formula and SCRCQ method calculated that the contribution rate of climate change to runoff reduction was 58.13% and 63.29%, respectively. Climate change was the main factor of runoff reduction in the study area, and the contribution rate of human activities to runoff reduction should not be underestimated, reaching 41.87% and 36.71%, respectively.

Key words

the upper reaches of the Minjiang River / runoff evolution characteristics / Budyko theory / attribution analysis

Cite this Article

Qian CHEN, Xiao-zhang LEI, Yin-yin ZHANG. Runoff Changes and Attribution Identification in the Upper Reaches of Minjiang River in Recent 59 Years[J]. Water Resources and Power, 2023 , 41 (3) : 10 -13 . DOI: 10.20040/j.cnki.1000-7709.2023.20221672

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Year 2023 volume 41 Issue 3

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Article Info

doi: 10.20040/j.cnki.1000-7709.2023.20221672

Receive Date：2022-08-13
Online Date：2026-01-28
Published：2023-03-25

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History

Received：2022-08-13
Revised：2022-10-13

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Affiliations

^a.College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China

^b.State Key Laboratory of Hydraulics and Mountain River Protection, Sichuan University, Chengdu 610065, China

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表12种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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