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[1]QI Hongkun,JIAO Juying,YAN Xiqin,et al.Runoff and Sediment Evolution and Its Spatial Differentiation in the Tarim River Basin in Recent 40 Years[J].Research of Soil and Water Conservation,2022,29(05):117-123.

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Runoff and Sediment Evolution and Its Spatial Differentiation in the Tarim River Basin in Recent 40 Years

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 05 Page number: 117-123 Column: Public date: 2022-08-20

Title:: Runoff and Sediment Evolution and Its Spatial Differentiation in the Tarim River Basin in Recent 40 Years

Author(s):: QI Hongkun¹, JIAO Juying^1,2, YAN Xiqin², LI Jianjun¹; (1.Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China; 2.Institute of Soil and Water Conservation, China Academy of Sciences and Ministry of Water Resources, Yangling 712100, China)

Keywords:: runoff; sediment; spatiotemporal variation; spatial differentiation; Tarim River Basin

CLC:: P333

DOI:: -

Abstract:: In order to explore the change of water and sediment in Tarim River Basin caused by the change of natural conditions, based on the measured runoff and sediment transport data of the main Tarim River at Alar Station, Yulong Kashi River Control Hydrological Station-Tongguziluo Station, Yarkant River Ka Qun Station, Aksu River Xindahe Station and Kaidu River Yanqi Station from 1980 to 2020, we analyzed the runoff and sediment evolution and its spatial differentiation characteristics in the Tarim River Basin in the past 40 years by the Mann-Kendall test, Pearson correlation analysis and Pettitt non-parametric test. The results are summarized as follows. During 1980—2020, the runoff of Tongguziluke station, Alaer station, Kaqun station and Yanqi station in Tarim River Basin increased significantly, while the runoff of Xindahe station, Tongguziluke station and Alaer station appeared abrupt change point in 1992, 1999 and 2000, respectively. After mutation, they increased by 18.23%, 18.10% and 62.15% compared with before mutation. The sediment transport at Kaqun station and Tongguziluoke station showed no significant change trend, but the sediment transport at Alaer station, Xindahe station and Yanqi station all decreased significantly. The mutation points were all in 2001, and the sediment transport after mutation decreased 36.73%, 30.50% and 68.31% compared with before mutation. Runoff and sediment distribution in Tarim River had obvious spatial differences, four origin rivers controlled the spacial differences in runoff depth, the runoff depths of north river Aksu River and Kaidu River which originate from Tianshan were below the runoff depths of the south river Yarkant River and Yulongkashi River which originate from the Karakoram. Sediment modulus decreased from upstream to downstream. Runoff was mainly affected by rainfall and temperature gap. Sediment variation was due to vegetation coverage. In the region where the three upstream streams merge into the main stream, the annual average runoff consumption was 9.821 billion m³, runoff depth was 167.31 mm, silt volume was 4 424.15 million tons, and silt modulus was 753.69 t/(km²·a). The analysis of runoff and sediment data of four sources and one main stream of Tarim River proves that the comprehensive control project of Tarim River has achieved good ecological and environmental benefits.

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Last Update: 2022-08-20