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Water 2018, 10(7), 887; https://doi.org/10.3390/w10070887

Changes and Driving Forces of the Water-Sediment Relationship in the Middle Reaches of the Hanjiang River

1,2,3
,
1,3,* , 1,3
,
1,2,3
and
4
1
Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
Key Laboratory for Environment and Disaster Monitoring and Evaluation, Wuhan 430077, China
4
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China
*
Author to whom correspondence should be addressed.
Received: 2 May 2018 / Revised: 20 June 2018 / Accepted: 29 June 2018 / Published: 3 July 2018
(This article belongs to the Special Issue Watershed Hydrology, Erosion and Sediment Transport Processes)
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Abstract

Riverine sediment transport plays an important role in the global geochemical cycle. With a growing interest in global riverine environmental changes, a better understanding of water-sediment relationship dynamics and their driving forces is crucial for basin management, which is particularly associated with cascade dam construction. In this contribution, a simple and effective sediment load reduction factor analysis is used to attribute the changes in river sediment load to different drivers. The Mann–Kendall (MK) trend test and the double-mass curve (DMC) method were combined to reveal the trends and causes of change in the water-sediment relationship from 1965 to 2015 in the middle reaches of the Hanjiang River. We found that sediment load trend decreased significantly, which was caused by a decrease in water yield (5.05%), and the relative contributions of precipitation decrease (1.66%). Furthermore, only one mutation could be identified in 1974 at Huangzhuang station. Evapotranspiration and vegetation coverage had slight decreasing effects on sediment load. The impact of human activities on the water-sediment relationship has intensified over the past 15 years. We therefore propose the establishment of an integrated basin-wide ecosystem and optimized reservoir operation rule for sustainable water use and sediment regulation. View Full-Text
Keywords: Hanjiang River; water-sediment relationship; driving forces; water-sediment factors identity approach; Double Mass Curve (DMC) Hanjiang River; water-sediment relationship; driving forces; water-sediment factors identity approach; Double Mass Curve (DMC)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Lu, X.; Wang, X.; Yang, C.; Liu, X.; Yang, Q. Changes and Driving Forces of the Water-Sediment Relationship in the Middle Reaches of the Hanjiang River. Water 2018, 10, 887.

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