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[1]YANG Xiaogao,HAO Hu,ZHAO Chuanyan,et al.Effects of Rainfall and Temperature on River Runoff During Growing Season in Tianlaonchi Catchment in the Upper Reaches of Heihe River Basin[J].Research of Soil and Water Conservation,2022,29(04):263-269.

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Effects of Rainfall and Temperature on River Runoff During Growing Season in Tianlaonchi Catchment in the Upper Reaches of Heihe River Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 04 Page number: 263-269 Column: Public date: 2022-06-20

Title:: Effects of Rainfall and Temperature on River Runoff During Growing Season in Tianlaonchi Catchment in the Upper Reaches of Heihe River Basin

Author(s):: YANG Xiaogao¹, HAO Hu², ZHAO Chuanyan¹, ZANG Fei¹, AN Jinling², ZHANG Maojun², ZHANG Hengping²; (1.State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; 2.Management Bureau of Qilian Mountains Nature Reserve in Gansu, Zhangye, Gansu 734000, China)

Keywords:: Heihe River Basin; rainfall; air temperature; river runoff; lag time

CLC:: P333

DOI:: -

Abstract:: The shortage of water resources in the northwest arid area has become increasingly prominent, but the accurate hydrological data related to river runoff in the alpine mountain area in the upper reaches of Heihe River are scarce, so it is particularly necessary to carry out observations and study the process of change. The Tianlaochi catchment in the upper reaches of Heihe River Basin was selected as the study area. The daily river runoff, rainfall and air temperature in the growing season of 2016, 2017 and 2019 were observed. Methods of correlation analysis and multiple linear regression were used to analyze the effects of two meteorological elements on river runoff. The results show that the monthly average runoff obviously lagged behind the monthly average rainfall and monthly average temperature during the growing season, all of which showed a unimodal change trend, and the average lag time of river runoff to rainfall was 7.5 days; the Pearson correlation coefficients of monthly average rainfall, monthly average temperature and monthly average runoff during the growing season were 0.69 and 0.87(p<0.01), respectively, and R² of the fitted multiple linear regression model was 0.772. The study shows that rainfall and temperature could well explain the change of river runoff in this basin, and the research results can provide a reference basis for the river runoff response process in the mountainous area of the upper reaches of Heihe River.

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Last Update: 2022-06-20