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Introduction of CMADS Dataset and its Application in China
Meng Xianyong, Wang Hao,Cai Si-yu, Lei Xiao-hui, Zhang Xue-song
China Institute of Water Resources and Hydropower Research
Pacific Northwest National Laboratory and University of Maryland
July 27, 2016, SWAT Conference 2016, Beijing
Who am i
Name: Meng Xian-yong
Engineer and Postdoctoral fellow, China Institute of Water Resources and
Hydropower Research (IWHR)
Education: BSc and MSc in Computer science and GIS
PhD in Atmospheric and hydrological coupling
Research: Land Surface Modeling, Model Development & Evaluation
Land–Atmosphere Interaction, Climate Modeling, Climate Change
and Impacts on Water Resources and Environment
Email: [email protected]
Outline
• Introduction
• Development of hydrological models and why build CMADS?
• Introduction and verification of CMADS dataset
• Verification and analysis of CMADS+SWAT mode in Heihe River Basin
• Verification and analysis of CMADS+SWAT mode in Xingjiang JingboheRiver Basin
• Summary
3
Relations between Eggs (input data), Factory (model) and cakes(output)
Input(good-
quality eggs)
MODEL/factory
Input
(bad eggs)
Output
(bad cakes)
Output
(good-
quality cakes)
• Uncertainty of hydrological process simulation mainly comes from atmospheric forcing field and hydrological models.
• Meteorological station:scarce stations, low spatial representation, deficiency and incontinuity of data series, incomplete elements (such as solar radiation).
• Model simulation: Although we can simulate continuously according to embedded equations, there are some different deviations.
Problems
Although meteorological input data is important to model output,
distribution of meteorological stations in China is uneven and scarce.
How to decrease the uncertainty of meteorology and its modes and
increase the accuracy of land surface hydrology, so as to obtain space-
time components with high accuracy and reliability?
Multivariate data assimilation is imperative。。。
Modeling Evolution
① Spatial coverage: East Asia(70-150°E, 0-60°N);latitude-longitude grid (1280 * 960);
② Resolution ratio: time 1h;horizontal 1/16°;
③ Time :2009 - 2012;
④ Product category: temperature, air pressure, humidity, wind speed, radiation, precipitation driving field;
Encryption station Automatic station
Radar station
Meteorological data
Disposal methodAssimilating forcing data
ECWMF
CMADS data processing and building
Data average、recalculation、interpolation sampling、and assignment
CLDAS atmospheric forcing field
temperaturehumidity
Wind speedAir pressure
radiation
precipitation
CMADS v1.3
CMADSv1.1
CMADSv1.0
CMADS dataset
Data processing
CMADSv1.2
Hourly data averaged as daily
data
Recalculate relative
humidity by using
temperature and pressure
Bilinear interpolation
sampling
Nested assignment
sampling
The assessment of CMADS in China
(temperature, pressure, humidity and wind)
Spatial distribution of correlation coefficients between observed 3-hour
precipitation and gauged data
Constitution of CMADS
………………………………………………………………
………………………………………………………………….………………………………………………………………….
For-other-model
………………………………………………………………………………………………
Verification of CMADS+SWAT mode in Heihe River Basin in China
Land surface input data
(Digital elevation model)
(Soil distribution )
(Land use distribution)
Hydrological verification data
Atmospheric forcing input data
Figure 4 The CMADS data (annual precipitation, the highest and lowest temperature distribution) in the Heihe River Basin
5 10 15 20 25 30 35 40 45 50 55 60
-20
-10
0
10
20
月
温度
(℃)
(T1)
TWS-TMax
TWS-TMin
CMADS-TMax
CMADS-TMin
CFSR-TMax
CFSR-TMin
5 10 15 20 25 30 35 40 45 50 55 60
-20
-10
0
10
20
30
月
温度
(℃)
(T2)
TWS-TemMax
TWS-TemMin
CMADS-TemMax
CMADS-TemMin
CFSR-TemMax
CFSR-TemMin
5 10 15 20 25 30 35 40 45 50 55 60
-20
-10
0
10
20
月
温度
(℃)
(T3)
TWS-TemMax
TWS-TemMin
CMADS-TemMax
CMADS-TemMin
CFSR-TemMax
CFSR-TemMin
5 10 15 20 25 30 35 40 45 50 55 60
-20
-10
0
10
20
月
温度
(℃)
(T4)
TWS-TemMax
TWS-TemMin
CMADS-TemMax
CMADS-TemMin
CFSR-TemMax
CFSR-TemMin
Fig5 . The cumulative average monthly (from year 2009 to 2013) rainfall of TWS, CMADS and CFSR at four sites (T1-T4)
5 10 15 20 25 30 35 40 45 50 55 600
1
2
3
4
5
6
月
降水
(mm
)
(T1)
TWS-Pre
CMADS-Pre
CFSR-Pre
5 10 15 20 25 30 35 40 45 50 55 600
1
2
3
4
5
月降
水(m
m)
(T2)
TWS-Pre
CMADS-Pre
CFSR-Pre
5 10 15 20 25 30 35 40 45 50 55 600
2
4
6
8
10
月
降水
(mm
)
(T3)
TWS-Pre
CMADS-Pre
CFSR-Pre
5 10 15 20 25 30 35 40 45 50 55 600
2
4
6
8
10
月
降水
(mm
)
(T4)
TWS-Pre
CMADS-Pre
CFSR-Pre
Fig6 . The mean, maximum and minimum temperature (from year 2009 to 2013) of TWS, CMADS and CFSR at four sites (T1-T4)
Table 4 Final value and sensitive ranking of model parameters
Model assessment
Monthly-scale runoff simulation results of three modes driven by three datasets at three sub-basins
A)CMADS+SWAT mode B)TWS+SWAT mode C)CFSR+SWAT modeFigure 7 Simulation results of monthly average runoff of three different modes at Qilian Mountain control station (2009-2013))
A)CMADS+SWAT mode B)TWS+SWAT mode C)CFSR+SWAT modeFigure 8 Simulation results of monthly average runoff of three different modes at ZhaMashenke control station (2009-2013)
A)CMADS+SWAT mode B)TWS+SWAT mode C)CFSR+SWAT modeFigure 9 Simulation results of monthly average runoff of three different modes at Ying Luoxia control station (2009-2013)
Daily-scale runoff simulation results of three modes driven by three datasets at three sub-basins
A)CMADS+SWAT mode B)TWS+SWAT mode C)CFSR+SWAT modeFigure 10 Daily runoff simulation results of three different modes at Qilian Mountain control station (2009-2013)
A)CMADS+SWAT mode B)TWS+SWAT mode C)CFSR+SWAT modeFigure 11 Daily runoff simulation results of three different modes at ZhaMashenke control station (2009-2013)
A)CMADS+SWAT mode B)TWS+SWAT mode C)CFSR+SWAT modeFigure 12 Daily runoff simulation results of three different modes at Ying Luoxia control station (2009-2013)
Differences caused by water balance
Water balance chart in Heihe River Basin of three modes(TWS+SWAT, CFSR+SWAT andCMADS+SWAT), where PREC、SURQ、LATQ、GWQ、PERCOLATE、SW、ET and WYLD represent precipitation, land surface runoff, side flow, subsurface flow, lateral seepage flow, soil water, real evaporation and runoff.
Relative elements analysis of CMADS driving SWAT model in Heihe River Basin
Figure of space-time relationships between snowmelt and soil humidity of CMADS+SWAT mode
(a) (b)
(c) (d)
(e) (f)
Analysis graph of relationships between snowmelt and soil humidity of CMADS+SWAT mode from July to August in recent five years (2009-2013)
(a) (b)
(c) (d)
(e) (f)
Verification 2: Jing-bo River Basin in Xinjiang
Digital elevation model data
Soil distribution
Soil land use distribution
Station name Latitude Longitude Station
evaluation(m)
Data
period(year)
Wenquan 44°59′ 81°02′ 1310 2009-2013
Jinghe Mountain
output
44°22′ 82°55′ 620 2009-2013
Relative information of hydrological stations in Jing-bo Biver Basin
Runoff simulation and verification based on CMADS+SWAT mode
Relative analysis between soil humidity and other variables based on CMADS+SWAT mode
Currently, CMADS can be downloaded free, welcome to use.CMADSV1.0 download link:http://westdc.westgis.ac.cn/data/6aa7fe47-a8a1-42b6-ba49-62fb33050492CMADSV1.1 download link:http://westdc.westgis.ac.cn/data/647e6569-bd21-4bea-8acc-5d38bc4cd3c0
Verification of CMADS dataset in Heihe River Basin in Qilian Mountain in China refers to:MENG Xian-yong, SHI Chun-xiang, LIU Shi-yin, WANG Hao, LEI Xiao-hui,LIUZhi-hui,JI Xiao-nan, CAI Si-yu, ZHAO Qiu-dong.CMADS datasets and its application in watershed hydrological simulation: A case study of the Heihe River Basin[J].PERRL RIVER,2016,37(7):1-19.
Thank you for your attention!If you are interested in CMADS, welcome to join
the QQ group.