Next Article in Journal
Assessing Long-Term Hydrological Impact of Climate Change Using an Ensemble Approach and Comparison with Global Gridded Model-A Case Study on Goodwater Creek Experimental Watershed
Previous Article in Journal
Sub-Seasonal Snowpack Trends in the Rocky Mountain National Park Area, Colorado, USA
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Water 2018, 10(5), 563; https://doi.org/10.3390/w10050563

Spatio-Temporal Variations of the Stable H-O Isotopes and Characterization of Mixing Processes between the Mainstream and Tributary of the Three Gorges Reservoir

1
Key Laboratory of Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
2
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
3
Department Key Laboratory of Water Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
4
The Tibet Autonomous Region Hydrology and Water Resources Survey, Tibet Autonomous Region 850000, China
5
College of Water Conservancy and Hydropower, Hebei University of Engineering, Handan 056001, China
*
Authors to whom correspondence should be addressed.
Received: 28 March 2018 / Revised: 19 April 2018 / Accepted: 23 April 2018 / Published: 26 April 2018
(This article belongs to the Section Water Resources Management and Governance)
Full-Text   |   PDF [2188 KB, uploaded 3 May 2018]   |  

Abstract

Understanding the runoff characteristics and interaction processes between the mainstream and its tributaries are an essential issue in watershed and water management. In this paper, hydrogen (δD) and oxygen (δ18O) isotope techniques were used in the mainstream and Zhuyi Bay (ZYB) of the Three Gorges Reservoir (TGR) during the wet and dry seasons in 2015. It revealed that (1) Precipitation was the main source of stream flow compared to the TGR water line with meteoric water line of the Yangtse River basin; (2) The δD and δ18O values exhibited a ‘toward lighter-heavier’ trend along mainstream due to the continuous evaporation effect in the runoff direction, and the fluctuations reflected incoming water from the nearest tributaries. The general trend of d-excess increased with increasing distance from the Three Gorges Dam, which indicated that kinetic fractionation was an important process affecting the isotopic composition. The enrichment effect of isotopes was found in the downstream of TGR; (3) Water mass from the TGR mainstream flowed backward to the confluence zone of ZYB via the middle and bottom layers in the dry season, whereas in the wet season, water reversed through the upper-middle layers due to thermal density flows. This study described and demonstrated that the water cycle of TGR was driven by natural environmental variability and operational system, which will provide valuable information for the water resource management and for controlling the algal blooms in the future. View Full-Text
Keywords: Three Gorges Reservoir; hydrogen and oxygen isotopes; deuterium excess; interaction process; Zhuyi Bay Three Gorges Reservoir; hydrogen and oxygen isotopes; deuterium excess; interaction process; Zhuyi Bay
Figures

Figure 1

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).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Jiang, R.; Bao, Y.; Shui, Y.; Wang, Y.; Hu, M.; Cheng, Y.; Cai, A.; Du, P.; Ye, Z. Spatio-Temporal Variations of the Stable H-O Isotopes and Characterization of Mixing Processes between the Mainstream and Tributary of the Three Gorges Reservoir. Water 2018, 10, 563.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top