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Water 2016, 8(10), 455; doi:10.3390/w8100455

Runoff Simulation in the Upper Reaches of Heihe River Basin Based on the RIEMS–SWAT Model

1
Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China
4
Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
*
Author to whom correspondence should be addressed.
Academic Editor: Henry Lin
Received: 17 August 2016 / Revised: 26 September 2016 / Accepted: 11 October 2016 / Published: 14 October 2016
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Abstract

In the distributed hydrological simulations for complex mountain areas, large amounts of meteorological input parameters with high spatial and temporal resolutions are necessary. However, the extreme scarcity and uneven distribution of the traditional meteorological observation stations in cold and arid regions of Northwest China makes it very difficult in meeting the requirements of hydrological simulations. Alternatively, regional climate models (RCMs), which can provide a variety of distributed meteorological data with high temporal and spatial resolution, have become an effective solution to improve hydrological simulation accuracy and to further study water resource responses to human activities and global climate change. In this study, abundant and evenly distributed virtual weather stations in the upper reaches of the Heihe River Basin (HRB) of Northwest China were built for the optimization of the input data, and thus a regional integrated environmental model system (RIEMS) based on RCM and a distributed hydrological model of soil and water assessment tool (SWAT) were integrated as a coupled climate–hydrological RIEMS-SWAT model, which was applied to simulate monthly runoff from 1995 to 2010 in the region. Results show that the simulated and observed values are close; Nash–Sutcliffe efficiency is higher than 0.65; determination coefficient (R2) values are higher than 0.70; percent bias is controlled within ±20%; and root-mean-square-error-observation standard deviation ratio is less than 0.65. These results indicate that the coupled model can present basin hydrological processes properly, and provide scientific support for prediction and management of basin water resources. View Full-Text
Keywords: Heihe River Basin; SWAT model; RIEMS model; coupled climate–hydrological model; runoff simulation Heihe River Basin; SWAT model; RIEMS model; coupled climate–hydrological model; runoff simulation
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Zou, S.; Ruan, H.; Lu, Z.; Yang, D.; Xiong, Z.; Yin, Z. Runoff Simulation in the Upper Reaches of Heihe River Basin Based on the RIEMS–SWAT Model. Water 2016, 8, 455.

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