CMADS Verification
CMADS V1.0+SWAT Verification in Manas River basin
Verification

    Hydrological simulation in meteorological ungauged areas has always been a difficult problem for the study on atmospheric and hydrological coupling; meanwhile, it is also one of the important factors that restrict model development and basin water resource knowledge. To analyze the mechanism of atmospheric and hydrological coupling, this study quantitatively evaluated water cycle situation in basins covered with glaciers and snow, and chose the Manas River Basin (MRB) in China as the typical research area to verify the adaptability of the China Meteorological Assimilation Driving Datasets for the Soil and Water Assessment Tool model (CMADS). The SWAT model was firstly built to simulate water resources, then we calibrated the model with CMADS dataset and started localization in the Manas River Basin (MRB), China, and finally calibrated simulated runoff with observed data SWAT-CUP (SWAT Calibration and Uncertainty Programs). In addition, parameter sensitivity analysis, and parameter calibration and validation were also included in the present study. Results showed that the SWAT model could well reproduce the runoff process of two stations (Kenswat and Hongshanzui) in the research area by using data from CMADS. The simulation performed well on monthly scale in both stations, where R2=(0.556-0.999) and NSE=(0.937-0.998), and also showed satisfactory effects, where R2= (0.927-0.993) and NSE= (0.836-0.997).Our research suggests that the SWAT model can show satisfactory results through parameter calibration in areas with high glacial recharge rate. Moreover, CMADS can provide necessary meteorological data for SWAT simulations, and support parameter calibration and historical surface data analysis[1].

Figure.1 Comparison of yearly runoff using SWAT for Kenswatstation

Figure.2 Comparison of monthly runoff using SWAT for Kenswatstation

Figure.3 Comparison of annualrunoff using SWAT for Hongshanzui station

Figure.4 Comparison of monthly runoff using SWAT forHongshanzui station



Table 1 Performance Statistics for flow simulations atHongshanzui station

Object

Calibration

(1981-1994)

Validation

(1995-2007)

RRMSE (Annual)

0.418

0.292

PBIAS (Annual)

3.67

3.45

NSE (Annual)

0.836

0.922

R2 (Annual)

0.983

0.927

RRMSE (Monthly)

0.086

0.084

PBIAS (Monthly)

3.4

4.81

NSE (Monthly)

0.997

0.937

R2 (Monthly)

0.993

0.938

[1]Meng,X.Y.,Wang,H.,Lei,X.H.,Cai,S.Y.,Wu,H.J(2017).Hydrological Modeling in the Manas River Basin Using Soil and Water Assessment Tool Driven by CMADS. Tehnicki Vjesnik -Technical Gazette,24,(2),525-534.DOI: 10.17559/TV-20170108133334

Validation by Dr.Xianyong Meng

Publish by Dr.Xianyong Meng