Affiliation:
1. 1 North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Abstract
Abstract
This study evaluates the characteristics of river runoff and sediment changes in the Wei River mainstream over the past 50 years based on runoff and sediment data and meteorological data from 1971 to 2020 at the Huaxian hydrological station in the lower reaches of the Wei River. The main research methods are the Mann–Kendall method, wavelet analysis, cross-wavelet analysis, and cumulative curve method. The results show that there is no significant decreasing trend and abrupt change in runoff volume in recent years, the decreasing trend of sediment transport is obvious, and the abrupt change occurs around 2006. The dominant periodicity of runoff is 12–13a, and the dominant periodicity of sediment transport is 5a. There is only a significant resonance periodicity of 3–5a in 1980–1990, which is roughly a positive correlation. The runoff–sediment series can be divided into four time periods, and the reasons for the change in the runoff–sediment relationship are different in each time period. The precipitation factor has a slightly greater impact on runoff and a weak impact on sediment transport, with contribution rates of 21.2 and 7.6%. Human activities such as subsurface changes and water conservancy construction have a greater impact on runoff and sediment load, with contribution rates of 78.8 and 92.4%.
Funder
National Natural Science Fund of China
2016 Henan University Science and Technology Innovation Talent Support Plan
Guizhou Provincial Water Resources Department 2020 Water Conservancy Science and Technology Project
Basic Research Project of Key Scientific Research Projects of Colleges and Universities of Henan Province
Subject
Management, Monitoring, Policy and Law,Atmospheric Science,Water Science and Technology,Global and Planetary Change
Cited by
2 articles.
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