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How to maximize the predictive value of available data in ungauged basinsSuxia Liu 1*Changming Liu 1 Weimin Zhao 2 1. Key Laboratory of Water Cycle & Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China; 2. The Bureau of Hydrology, Yellow River Conservancy Committee, Zhengzhou 450004, China *[email protected]

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Page 1: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

How to maximize the predictive value of available data in ungauged basins?

Suxia Liu1,*, Changming Liu1, Weimin Zhao2

1. Key Laboratory of Water Cycle & Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;2. The Bureau of Hydrology, Yellow River Conservancy Committee, Zhengzhou 450004, China

*[email protected]

Page 2: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Suxia Liu

Lake Donghu, Hubei

Luancheng, North China Plain

SonghuangRiver, NorthEastChina

Yanghe, Hebei

GouburnRiver,NSW,Australia

Dawen River, Laiwu Shandong

Akesu River,Xinjiang

Niqu River, Sichuan

Wuding River, Shaanxi

Liangxi River, Wuxi, Jiangsu

Lushi River, Henan

NiquRiver,Sichuan

Page 3: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

ϖStrengthen the hydrological theory

ϖExtend the prediction of discharge to all the hydrological elements

ϖ Not only on the predictions of elements, but also on the Responses and among others

ϖ Not only hydrological, but also Interdisciplinary

My research interests¬ Interface Processes¬ Spatial and Temporal Variation of Hydrological elements

¬ Hydrological Response to CC and LUCC

¬ Environmental Flow

Page 4: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• Established in 2004• Scientific Chair: Professor Academician

Changming Liu• Chair: Professor Jun Xia• Vice Chair: Professor Dawen Yang, etc• Secretary General: Professor Suxia Liu

China PUB Working Group

Page 5: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

IAHS-PUB-CHINA meeting2004

Activities of China PUB so far

Page 6: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

PUB Seminar 2004

Activities of China PUB so far

Page 7: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

IAHS-PUB-CHINA 2006

Activities of China PUB so far

IAHS Publication No. 322 (RED book)

Page 8: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

IAHS-PUB-CHINA 2008

Activities of China PUB so far

IAHS Publication No. 335 (RED book)

Page 9: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

IAHS-PUB-CHINA 2010

Activities of China PUB so far

Special issue……..

Page 10: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• If there is no food at home, how will a house wife maximize the nutrition value of available food under the no-rice situations?

How?to maximize the predictive value of available data in ungaugedbasins?

Liu et al. Advances in Geographical Science, 2010

Page 11: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• She will– Borrow (maps for interpolating&transplanting)– Replace----to find some substitutes

• From the same region, (by modeling, rational; innovation ideas)

• From other regions, (comparative analysis, paired-catchment and upscaling )

– Generate (field and laboratory experiment)

How?to maximize the predictive value of available data in ungauged basins?

Liu et al. Advances in Geographical Science, 2010

Page 12: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• Maps, annals of hydrological elements for interpolating and transplanting data from known regions

(1) By borrowingHow?to maximize the predictive value of available data in ungauged basins?

Data A Neighbors’ data Aborrow

Page 13: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

sdinfo1.chinawater.net.cn/yytj/Wr_narco.htm

How?to maximize the predictive value of available data in ungauged basins?

Regional map

Page 14: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• Simple, but useful, usually for estimating annual runoff.

• Should and can be extended to all elements including evapotranspiration, soil moisture, etc.

• Hard to be sure in mountain areas,needs better interpolation method.

• GIS will enhance its applications

How?to maximize the predictive value of available data in ungauged basinsBy borrowing

Page 15: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• By using hydrological models

(2.1)Replace _from the same regionHow?to maximize the predictive value of available data in ungauged basins

Input data A

model

Prediction and estimation B

Page 16: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• Simple (conceptual model, rational formula,etc), or complex model (process-based model, eco-hydrological model, etc)?

Both have pro and cons but each plays important roles in different ways for PUB

How?to maximize the predictive value of available data in ungauged basinsBy Replacing from the same region

Page 17: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• Example By using HIMS model.

(2.1)Replace _from the same regionHow?to maximize the predictive value of available data in ungauged basins

Input data A

model

Prediction and estimation B

Page 18: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Framework of HIMSFramework of HIMS

HydroInformatic Modeling System (HIMS)

Database

♠Module based♠Model Customized

Indoor Exp.

♠Distributed Models♠Lumped Models

Water Resources Management

Mechanism

StructureO

bjects

Field ObservationHydrologic Processes

Model-baseGIS/RS

Pollution and Erosion Climate ChangeFlood

Forecasting

Page 19: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Components of HIMS:

HydroInformatic System Based on GIS

With the component-based GIS software (SuperMap),

HIMS is able to manage the hydrologic database efficiently

and derivate a watershed effectively.数字流域信息提取系统

D EM分析 图形输出

新增流域

删除流域

坡度坡向

流 向

水流累积

等流时线

河 网

子 流 域

文 件

编号 ~坐标

提取子D EM

打开文件

设 置

退 出

数据 /图形

D EM图

坡度图

坡向图

流向图

地形指数图

水流累积图

河网图

子流域图

帮 助

操作说明

关 于

隐藏属性

Page 20: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Case study of the daily scale model in the Jinghe River Basin

Spatial patterns of runoff and runoff coefficientSpatial patterns of runoff and runoff coefficient

Page 21: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Case study of Daily model in 331 watersheds of Australia

Precipitation <400mm 400-600mm 600-800mm 800-

1200mm >1200mm mean

Area< 100 km2 - 0.60 0.60 0.67 0.79 0.66

100-500 km2 0.56 0.51 0.78 0.78 0.84 0.73

500-1000 km2 - 0.52 0.70 0.81 0.69 0.68

>1000 km2 - 0.25 0.80 0.81 0.75 0.65

Mean 0.56 0.47 0.72 0.76 0.77 0.68

0

2000

4000

6000

8000

1 601 1201 1801 2401 3001 3601 4201 4801 5401 6001

效率系数:0.67

020040060080010001200

1 601 1201 1801 2401 3001 3601 4201 4801 5401 6001 6601 7201 7801 8401 9001

实测SI MHYDHI MS

效率系数:0.51

0

2000

4000

6000

8000

10000

1 601 1201 1801 2401 3001 3601 4201 4801 5401 6001

效率系数: 0.84

•Dataset: 331 watersheds, 50 years daily precipitation and potential evaporation;

•Efficiency Coefficient: average to 0.68

Page 22: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

¬Flood events prediction

♠ DEM resolution:30-100m

♠ Temporal resolution: minutes to hours

Efficiency Coefficient>0.8

Page 23: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

The HIMS model, with good modeling behavior in different climate zone, shows high potential for regionalization,the potential to be used in ungauged basins.

Page 24: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• Example by using VIP model.

(2.1)Replace _from the same regionHow?to maximize the predictive value of available data in ungauged basins

Input data A

model

Prediction and estimation B

Page 25: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

VIP model

Mo et al. AEE, 2009

Page 26: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• Three sources ( sunlit and shaded canopy and soil surface) energy balance

• Variable storage runoff formation curve • Vegetation ecological dynamic

parameterization

Features

Mo et al, AFM,2001

Mo et al. MAP, 2004

Mo et al. EM, 2005

Mo et al. AEE, 2009

Page 27: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,
Page 28: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Wuding River

Page 29: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Model Output

Page 30: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,
Page 31: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,
Page 32: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,
Page 33: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,
Page 34: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,
Page 35: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,
Page 36: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

0

600

1200

1800

1988 1989 1990 1991 1992 1993Year

Dis

char

ge(m

3 s-1)

modelledObserved

0

600

1200

1800

1993 1994 1995 1996 1997 1998Year

Dis

char

ge(m

3 s-1) modelled

Observed

-2

1

4

7

-2 1 4 7Modelled log(Q)

Obs

erve

d lo

g(Q

)

Model Validation

Page 37: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

-40

-20

0

20

40

Cao

ping

Lijia

he

Qin

gyan

gca

Sui

de

Hen

gsha

n

Dijia

gou

Bai

jiach

uan

[%]

Y:(Q_Sim-Q_obs)/Q_obs

Model Validation

Page 38: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Annual scale

Model Validation

Page 39: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Model Validation

Page 40: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Suide

020406080

100

92-1-8

92-7-8

93-1-8

93-7-8

94-1-8

94-7-8

95-1-8

95-7-8

96-1-8

96-7-8

97-1-8

97-7-8

Rel

ativ

e SM

(%)

VIP TUW OBS

Yulin

020406080

100

1992-1-8

1992-7-8

1993-1-8

1993-7-8

1994-1-8

1994-7-8

1995-1-8

1995-7-8

1996-1-8

1996-7-8

1997-1-8

1997-7-8

Rel

ativ

e S

M (%

)Model Validation

Page 41: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

01020304050607080

J F M A M J J A S O N DMon

Rel

ativ

e SM

(%)

tuw

VIP_normalized

Model Validation

Page 42: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

North Drying,

Model applications----generate long-term data series for future trend

Page 43: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

SM decrease at 0.01;

Discharge decrease at 0.001;

P decrease at 0.1,

T increases at 0.01

Model applications----generate long-term data series for future trend

Page 44: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Model applications----explore the response of hydrological elements to LUCC

Page 45: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

dT, dP

C L Q H S D B+0.5k, +10% 0.19 0.15 0.13 0.16 0.15 0.18 0.19

+0.5k, -10% -0.20 -0.15 -0.13 -0.16 -0.17 -0.17 -0.20+1.0K,+10% 0.18 0.12 0.11 0.16 0.13 0.16 0.16+1.0K, -10% -0.21 -0.17 -0.14 -0.16 -0.18 -0.18 -0.22• Response exists spatial variability。

• When p increases, the response will be larger with the temperature gain

• When p decreases, the response will be smaller with the temperature gain

• Response to precipitation is proportional

Model applications----explore the response of hydrological elements to climate change

Page 46: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

1km Rule,

Mo X, Liu S, et al, HSJ, 2009

Page 47: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

1km Rule,

Mo X, Liu S, et al, HSJ, 2009

Page 48: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Uncertainty

Mo X, Liu S, et al, HSJ, 2006

Page 49: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

The VIP model, although in very detail, but no need for calibration,can catch the mechanisms of the response for ungauged basin, which is useful to provide scientific basis for decision makers for water-saving agriculture, making reasonalbeadaptation measures to climate change and land-use/cover change.(explain why, tell how)

Page 50: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• By using rational formula (model)

(2.1)Replace _from the same regionHow?to maximize the predictive value of available data in ungauged basins

Input data A

model

Prediction and estimation B

Page 51: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

21 95.0 kkx +=

rtFfP )1(1

τ−===

τtP =1

3.035.011

15.033.0

22

5.05.02 278.0278.0

mm QIAL

QIAFL

+=τ 3.01

5.02

−− += mm QkQkτ

Page 52: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Liu and Wang,Water Resources Research,16(5), 1980

Page 53: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

The above rational formulae have been successfully used in designing the culvert and bridge construction along the 8 important railways in western ungauged area of China.

Page 54: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• Example by using innovational ideas(model)

(2.1)Replace _from the same regionHow?to maximize the predictive value of available data in ungauged basins

Input data A

model

Prediction and estimation B

Page 55: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Environmental Flow

Eco-hydraulic Radius method, Liu et al. 2008, Progress in Natural Sciences

LIHAFLOVA method, Liu et al. 2008, NSDBYSLKJ,

Relation between Amphibians and flow regimes, Liu et al. GWSP newsletter, 2008,

Analytical Wetted Perimeter method, Liu et al.Journal of Geographical Sciences, 2006,

Page 56: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

The above new methods were successfully used in western ungauged area of China for decisions-makers for planning the project to transfer water from South to North.

Page 57: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• Comparative analysis

• or

(2.2)Replace_from the other regionHow?to maximize the predictive value of available data in ungauged basins

A B

AB

Page 58: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Comparative Hydrology (CH)• Brankov (1946)• Chapman, T, G, Philosophy and analytical

approaches, Section 1, Comparative Hydrology, draft 2, June 1986

• 1986,IHP_III, CH workshop• M. Falkenmark and T. Chapman, Editors,

Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989).

• Ming-Ko Woo, Changming Liu, Mountain hydrology of Canada and China: A case study in comparative hydrology Hydrological Processes,8(6)573-587,1994

• FRIEND-UNESCO, 1999-2000

0

0

PPR

R xx =

Page 59: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Comparative Hydrology (CH)• 。。。。。。。• McDonnell, J.J. and R. Woods (2004)

Editorial: On the need for catchmentclassification. Journal of Hydrology, 299 (1-2), 2-3.…

• G. Blöschl, R. Merz, Thoughts on a process-based catchment classification,Geophysical Research Abstracts,Vol. 10, EGU2008-A-08153, 2008

Page 60: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,
Page 61: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Significance in Comparative Hydrology is to provide a base for understanding the dissimilarity and similarity in runoff formation of gauged and ungauged basins that is needed for deduction of the hydrological processes.

Basic law in nature

Deduction

Non-Deduction

Hydrological processes in different climate zones

Technology Data Model Direct Comparison based on observed data

Transfer between the climate zones

Basic law in nature

Deduction

Non-Deduction

Hydrological processes in different climate zones

Technology Data Model Direct Comparison based on observed data

Transfer between the climate zones

Page 62: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

paired-catchment analysis

Liu et al. MAP, 2004

Page 63: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

• Field and laboratory experiments, remote sensing

(3)GenerateHow?to maximize the predictive value of available data in ungauged basins

Page 64: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Field survey and artificial rainfall-runoff experiments

Page 65: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Field survey and artificial rainfall-runoff experiments over many different basins.

Page 66: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

Remote Sensing

VIP

model

In-situ

Long-term soil moisture data

大气驱动 (温度, 降雨, 辐射, 气压, 风, CO2浓度。。。 )植被管理 ( 灌溉, 施肥)

枯枝落叶

土层 1

土层 n

土壤水

水循环

蒸发(潜热)

能量平衡 碳循环

氮循环

植被动力学/作物生长

NPP,NEP

深层排泄

径流

光合作用/气孔导度

土壤热

CO

2

冠层截留水

下渗

辐射吸收、转换

显热

大气驱动 (温度, 降雨, 辐射, 气压, 风, CO2浓度。。。 )植被管理 ( 灌溉, 施肥)

枯枝落叶

土层 1

土层 n

土壤水

水循环

蒸发(潜热)

能量平衡 碳循环

氮循环

植被动力学/作物生长

NPP,NEP

深层排泄

径流

光合作用/气孔导度

土壤热

CO

2

冠层截留水

下渗

辐射吸收、转换

显热

Liu et al. HESS, 2009

Data Assimilation

Page 67: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

¬Strengthen PUB theoretical study: now more in skill; theory in regional hydrology, comparative hydrology, PUB theoretical framework, in-situexperiments and general models, are highly wanted.

Some more to be done in the near future

Page 68: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

¬ Aim for innovative methods: Now all the methods are still in the general framework of the methodology

Some more to be done in the near future

Page 69: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

¬Find more applications of PUB. Now more in theoretical study, few on the practical problem solving

Some more to be done in the near future

Page 70: How to maximize the predictive value of available data in ... · Comparative hydrology. An ecological approach to land and water resources, UNESCO, Paris (1989). • Ming-Ko Woo,

How to maximize the predictive value of available data in ungauged basins?

BySuxia Liu, Changming Liu and Weimin Zhao