DOI: 10.5194/hess-21-5847-2017
Scopus记录号: 2-s2.0-85030840205
论文题名: Stream flow simulation and verification in ungauged zones by coupling hydrological and hydrodynamic models: A case study of the Poyang Lake ungauged zone
作者: Zhang L ; , Lu J ; , Chen X ; , Liang D ; , Fu X ; , Sauvage S ; , Perez J ; -M ; S
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 11 起始页码: 5847
结束页码: 5861
语种: 英语
Scopus关键词: Catchments
; Fluid dynamics
; Hydrodynamics
; Lakes
; Rivers
; Water resources
; Annual water yields
; Catchment area
; Direct observations
; Hydrodynamic model
; Hydrological modeling
; Observation data
; Poyang Lake basins
; Soil and water assessment tool
; Stream flow
; boundary condition
; calibration
; catchment
; estimation method
; experimental study
; hydrodynamics
; hydrological modeling
; seasonality
; soil and water assessment tool
; streamflow
; water yield
; China
; Jiangxi
; Poyang Lake
英文摘要: To solve the problem of estimating and verifying stream flow without direct observation data, we estimated stream flow in ungauged zones by coupling a hydrological model with a hydrodynamic model, using the Poyang Lake basin as a test case. To simulate the stream flow of the ungauged zone, we built a soil and water assessment tool (SWAT) model for the entire catchment area covering the upstream gauged area and ungauged zone, and then calibrated the SWAT model using the data in the gauged area. To verify the results, we built two hydrodynamic scenarios (the original and adjusted scenarios) for Poyang Lake using the Delft3D model. In the original scenario, the upstream boundary condition is the observed stream flow from the upstream gauged area, while, in the adjusted scenario, it is the sum of the observed stream flow from the gauged area and the simulated stream flow from the ungauged zone. The experimental results showed that there is a stronger correlation and lower bias (R2 = 0.81, PBIAS=10.00 %) between the observed and simulated stream flow in the adjusted scenario compared to that (R2 = 0.77, PBIAS=20.10 %) in the original scenario, suggesting the simulated stream flow of the ungauged zone is reasonable. Using this method, we estimated the stream flow of the Poyang Lake ungauged zone as 16.4×6.2 billionm3 a-1, representing ∼11.24% of the annual total water yield of the entire watershed. Of the annual water yield, 70% (11.48 billionm3 a-1) is concentrated in the wet season, while 30% (4.92 billionm3 a-1) comes from the dry season. The ungauged stream flow significantly improves the water balance with the closing error decreased by 13.48 billionm3 a-1 (10.10% of the total annual water resource) from 30.20±9.1 billionm3 a-1 (20.10% of the total annual water resource) to 16.72±8.53 billionm3 a-1 (10.00% of the total annual water resource). The method can be extended to other lake, river, or ocean basins where observation data is unavailable. © 2017 Author(s). This work is distributed under the Creative Commons Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78990
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, China; Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang, China; ECOLAB, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
Recommended Citation:
Zhang L,, Lu J,, Chen X,et al. Stream flow simulation and verification in ungauged zones by coupling hydrological and hydrodynamic models: A case study of the Poyang Lake ungauged zone[J]. Hydrology and Earth System Sciences,2017-01-01,21(11)