lecture i hydrological modeling requirements for water...
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Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Lecture I
Hydrological modeling requirements for Water
Resources Applications - Model Calibration and
parameter Estimation Issues Soroosh Sorooshian
Center for Hydrometeorology and Remote Sensing
University of California Irvine
The Abdus Salam ICTP Workshop on: Water Resources in Developing Countries - Planning and
Management in a Climate Change Scenario
Trieste, Italy: May 6th – 17th 2013
Center for Hydrometeorology and Remote Sensing, University of California, Irvine and many more …
S. Sellars
University of California Irvine (UCI) Research Team: Present and Recent Past
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Improve California’s water supply management through:
• Forecast system (CaliForecast) •Improved decision optimization
Prepare the next generation of hydrologists and water resources engineers
Utilizing Information Technology to provide world-wide access to real-time global precipitation products: http://hydis.eng.uci.edu/gwadi/
Develop state-of-the-art systems to estimate rainfall from satellite observations at global scale and high spatial and temporal resolutions
Improve the performance and reliability of hydrologic, flood, and water supply forecasting models, particularly those used by the National Weather Service and other operational agencies.
Center for Hydrometeorology and Remote Sensing
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Two Primary Water Resources/Hydrology
Challenges:
• Hydrologic Hazards ( Floods and
Droughts)
• Water Supply Requirements ( Quantity
and Quality)
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Hydrologic Forecasting Needs: Flash Floods
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Droughts: The Other hydrologic Extreme
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Two Primary Water Resources/Hydrology
Challenges:
• Hydrologic Hazards ( Floods and
Droughts)
• Water Supply Requirements ( Quantity
and Quality)
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Increasing Population: Number of Mega Cities
Global Urban population 1970: ~37%
2010: ~53%
Projected Global Population: 8.3 Billion by 2025
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Distribution of Fresh Water Use
90.8 33.4%
17.1%
49.5%
460
7.0% 6.0%
87.0%
36.47
18.6%
22.0% 59.4%
117
60.0% 17.0%
23.0%
467.34
45.2%
13.1%
41.7%
380
4.0% 3.0%
93.0% Agriculture
Industry
Domestic
Fresh Water Use
(109 Cubic Meters)
Water Source
Water Use
USA China India
Russia Japan Brazil
92% 6%
2%
70.3 Iran
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Global Climate: Past Decade and Prediction of End of 21st Centaury
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Primary Solution To Meet
Hydrologic Extremes and
Water Resources Needs
Engineering Approach: Control, Store, Pump and Transfer
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Hoover Dam
A Century of Water Resources Development: Engineering success
Central Arizona Project Aqueduct
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
1800 1900
1950
Impact on Design and Operation of Global Infrastructure
2000
More than 70,000 Dams in the U.S.
Provided by: C. J. Vörösmarty
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Short Range Long Range
hours days weeks months seasons years decades
Required Hydrometeorologic Predictions
Forecast Requirements
Short-range Mid-range Long-range
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Short Range Long Range
hours days weeks months seasons years decades
Required Hydrometeorologic Predictions
Forecast Requirements
Mid-range Long-range
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
A Key Consideration:
The Link Between
Climate and Hydrology
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Global Warming And Hydrologic Cycle Connection
Heating
Temperature Evaporation
Water
Holding
Capacity
Atmospheric
Moisture
Temperature oF Sa
tura
ted
Va
po
r P
res
su
re
t t+20
Green
House
Effect
Rain
Intensity
Drought Flood
Flood Drought
Created by: Gi-Hyeon Park
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
P
E
Qs
D Ss
D Sg Qg
Ig
Coupled
Ocean-Atmosphere
Models
Mesoscale
Models
SVATs
Hydrologic/Routing
Models
Water Resources
Applications
GEWEX
CLIVAR
Hydrologic Services
Water resources
management agencies
From the Global- to Watershed-Scale
CLiC
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Hydroclimate Science and Hydrologic/Water Resources Engineering
Hydrologic/Hydraulic Routing,
Water Resources Models
SCIENCE ENGINEERING
Hydrologic/Hydraulic and
Water Resources Engineering Hydroclimate Science
P
E
Qs
D Ss
D Sg Qg
Ig
Mesoscale
Models
SVATs
GCMs
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
River Basins and Watersheds
Continental Scale:
Watershed Scale:
Where hydrology happens
Where stakeholders exist
Different Scales
Different Issues
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Short Range Long Range
hours days weeks months seasons years decades
Climate-Scale approaches to addressing hydrologic extremes
Forecast Requirements
Long-range
•Use of climate models:
down-scaling and ensemble
schemes
•Traditional statistical
hydrology methods:
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Pre
cipit
ati
on
pre
dic
tion
Time (years)
Present Future 20 40 60 80
Climate Model Downscaling to Regional/Watershed Scales
Generation of Future Precipitation Scenarios
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Ensemble Approach
Generation of Future Precipitation Scenarios
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Present Future 20 40 60 80 Time (years)
Pre
cipit
ati
on
pre
dic
tion
Present Future
Time (years)
Flo
w
Generation of Future Runoff Scenarios
Downscaled Precipitation to Runoff Generation
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
1 0.5 0.2 0.1 0.05 0.02 0.01 0.005 0.002 0.001
Probability of Exceedance
Return Period (Years) 1 2 5 10 20 50 100 200 500 1000
600
500
400
300
200
100
0
Dis
ch
arg
e
(1000 c
fs)
Alternative Approach to Climate Model Downscaling
traditional statistical hydrology methods
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Probability density function
Time (years)
Presen
t Future
10 20 30 40 50 60 70 80 90 100 -100 -75 -50 -25 0
Flo
w (m
3/s
ec)
Past
0255075
100125150175200225250
1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000Flo
w (
m3/s
ec)
Time (years)
Statistical Hydrology: “synthetic” stream flow Generation
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Brief Review of Rainfall
Runoff modeling:
Progress in Hydrologic
Modeling
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Fundamental Law
Input Output
Change In Storage
I O
DS
I – O =DS
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Nature’s Way Terrain
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
The Watershed
Area km2 12.78
Perimeter km 19.344
Min Elevation m 478.00
Max Elevation m 1756.00
Mean Elevation 930.34
Max Flow Length 8.878
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Eva
po
ratio
n
(Oce
an
)
Eva
po
tra
nsp
ira
tion
Pre
cip
ita
tio
n
Pre
cip
ita
tio
n P
recip
ita
tio
n
Su
blim
atio
n
Eva
po
ratio
n
(La
ke
s &
Re
se
rvo
irs)
Va
po
r D
iffu
sio
n
Lake
Infiltra
tio
n
Dee
p P
erc
ola
tio
n
River
Aquifer
Eva
po
ratio
n
(La
nd
Su
rfa
ce
)
Vegetation
Interflow
Ponce, 1989
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Trace The Water Drop
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Distributed
Physically-based
API Model A
C
D
B
Lumped Conceptual
Distributed (Mike SHE)
VIC Model
Evolution of Hydrologic R-R Models
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
MODEL
PARAMETER
ESTIMATION
DATA
If the “World” of
Watershed Hydrology
Was Perfect!
Hydrologic Modeling: 3 Elements!
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Flow in Channels: How far can we go simplifying?
V = n-1 R2/3 S1/2
n – Manning Coefficient
R – Hydraulic Radius
S – Energy Slope
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Hydrologic Modeling
Will be Covered By Professor Aghakouchak
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Model Calibration
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
The Identification Problem
1. Select a model structure (Input-State-Output equations)
2. Estimate values for the parameters
U
U – Universal Set M1()
M2()
Mi() – Selected Model Structure
D
D
O
O
B - Basin
“The Truth”
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
The Concept of Model Calibration
Measured
Outputs
Yt
t
Real World
Measured
Inputs
MODEL () Computed
Outputs
Prior
Info
Computed
Outputs
+ -
Optimization Procedure
“Calibration: constraining the model to be consistent with observations”
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
The Automatic
Calibration Approach
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Calibration components
Objective Function
Search Algorithm
Sensitivity Analysis
Problems with identifiability
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
[General Exponential Power Density] (Posterior Parameter Probability Distribution Function)
N
j
jiN
i
ecp
1
1/2
exp,|
y
Uniform
Normal
Exponential
)1(
0
1
.)|(p
Calibration Criterion
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Objective function Parameter Space
θ1
θ2
F(θ)
θ
Parameter Space Objective Function Space
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Parameter Sensitivity
θ1
θ2
Parmeter Space
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Parameter Sensitivity
θ1
θ2
Parameter Space
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Parameter X
Ob
jecti
ve
Fu
ncti
on
True Parameter Set
The Ideal case: Convex Optimization
Created By G-H Park
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Ob
jecti
ve
Fu
ncti
on
Parameter X
True Parameter Set
Difficulties in Global Optimization
Created By G-H Park
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Parameter X
Ob
jecti
ve F
un
cti
on
Global Optimum
Parameter Estimation (non-convex, multi-optima)
Created By G-H Park
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Parameter X
Ob
jecti
ve F
un
cti
on
Global Optimum
Created By G-H Park
Parameter Estimation (non-convex, multi-optima)
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Data information content
“Bucket Model”
Simple two parameter Model
Cm
ax
K S
P
Q
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Data information content C
ma
x
K S
P
Q
Multiple
spills
Cmax
K
No spills
Cmax
K
Cm
ax
K S
P
Q
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
More than one main convergence region
1.- Regions of
Attraction
Difficulties in Optimization
Duan, Gupta, and Sorooshian, 1992, WRR
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
More than one main convergence region
1.- Regions of
Attraction
2.- Local
Optima
Many small "pits" in each region
Difficulties in Optimization
Duan, Gupta, and Sorooshian, 1992, WRR
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
2.- Local
Optima
Many small "pits" in each region
More than one main convergence region
1.- Regions of
Attraction
3.- Roughness Rough surface with discontinuous derivatives
Difficulties in Optimization
Duan, Gupta, and Sorooshian, 1992, WRR
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
3.- Roughness Rough surface with discontinuous derivatives
2.- Local
Optima
Many small "pits" in each region
More than one main convergence region
1.- Regions of
Attraction
4.- Flatness Flat near optimum with significantly different parameter sensitivities
Difficulties in Optimization
Duan, Gupta, and Sorooshian, 1992, WRR
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
4.- Flatness Flat near optimum with significantly different parameter sensitivities
3.- Roughness Rough surface with discontinuous derivatives
2.- Local
Optima
Many small "pits" in each region
More than one main convergence region
1.- Regions of
Attraction
Difficulties in Optimization
5.- Shape Long and curved ridges
Duan, Gupta, and Sorooshian, 1992, WRR
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Optimization Strategy – Local Direct Search
Calibration of the Sacramento Model
Downhill Simplex Method, Nelder & Mead, 1965
Duan, Gupta, and Sorooshian, 1992, WRR
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
The SCE-UA Algorithm …
(1992)
Duan, Gupta, and Sorooshian, 1992, WRR
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
The SCE-UA Algorithm …
Duan, Sorooshian, and Gupta 1992, WRR
The Shuffled Complex Evolution Algorithm
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
The Concept Behind SCE Method
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
The Concept Behind SCE Method
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
The Concept Behind SCE Method
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
The Concept Behind SCE Method
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
SCE Method – How it works …
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Shuffled Complex Evolution (SCE-UA)
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Global Optimization – The SCE-UA Algorithm
Simplex
Method
Shuffled
Complex
Evolution
(SCE-UA)
Duan, Gupta & Sorooshian, 1992, WRR
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Evolving Directions
Advances in Parameter Estimation
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Land-Surface Model
RHODE ISLAND
CONNECTICUT
FLORIDA
MISSISSIPPI
WEST
VIRGINIA
WASHINGTON
OREGONIDAHO
MONTANA
WYOMING
NORTH
DAKOTA
SOUTH
DAKOTA
NEBRASKA
IOWA
MINNESOTA
WISCONSIN
ILLINOIS
INDIANA OHIO
MISSOURIKANSASCOLORADO
UTAHNEVADA
CALIFORNIA
ARIZONA NEW MEXICO
OKLAHOMA
ARKANSAS
KENTUCKY
VIRGINIA
TEXAS
GEORGIA
ALABAMA
SOUTH
CAROLINA
NORTH CAROLINA
TENNESSEE
PENNSYLVANIA
MARYLAND
NEW JERSEY
NEW YORK
VERMONT
MAINE
DELAWARE
LOUISIANA
MICHIGAN
MASSACHUSETTSNEW HAMPSHIRE
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Multi-Objective Approaches
M()
Model
Radiation
Inputs Outputs
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Multi-Objective Optimization Problem
MOCOM Algorithm:
Does NOT require conversion
to a sequence of single optimization problems
Simultaneously finds
several Pareto Solutions
in a Single Optimization
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
ARM-CART SGP Site
100 km
Grid: ~100,000 km2
Luis A. Bastidas Z. (lucho@hwr.arizona.edu)
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
{H, Tg, Sw} {E} {Tg} {Sw}
Single- & Multi-Flux Calibrations {H}
E
Tg
H
Sw
Computed
Observ
ed
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
AGU Monograph – Now Available
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
End of Lecture I
Thank You For Listening
The Rio Grande River, NM Photo: J. Sorooshian 2005
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Additional Slides
Backup Material
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
UCt
UM
LM
Streamflow
Rainfall
percolation
LCt
UK
LK
PD = f(Z, X)
A look into the “heart” of R-R Models
Percolation Process is the
Core element in Partitioning
the rain between the various
stores
PD = f(Z, X)
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Free water
Tension water
Tension water
Percolation
RATE=PBASE(1+ZPERC*DEFR REXP)
NWS Soil Moisture Accounting Model: SMA-NWSRFS
Nonlinear structure with large number of parameters
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Parameter Uncertainty Methods
(1) First-order approximations near global optimum (Kuczera etal)
Limitations
• Assumes Model is Linear
• Assumes Posterior Dist. Guassian
(2) Generalized Likelihood Uncertainty Estimation (GLUE) method (Beven and co-workers)
(3) Markov Chain Monte Carlo (MCMC) methods
(Vrugt and others)
.)|( tp
.)|1( tp
1t t
1
2
.
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
.)|*(p
SCE-UA only solves for Mode of Distribution
Probability distribution
to be maximized
*
180 190 200 210 220 230 240 250 260 270 2800
5
10
15
20
= observations
= simulated flows
*
Hours
Flo
w
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Shuffled Complex Evolution Metropolis
SCE SCEM Vrugt, Gupta, Bouten & Sorooshian
WRR 2003
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Need estimates of the prediction uncertainty
*
Hours 180 190 200 210 220 230 240 250 260 270 2800
5
10
15
20
Uncertainty
associated
with parameters
Total Uncertainty
including structural
errors
.)|*(pProbability distribution
to be maximized
95%
*
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Flow Ranges instead of point estimates
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Multi-Criteria Calibration Concept
θ1
θ2
F1(θ)
F2(θ)
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
Multi-Criteria Calibration Approach
X1
X2
X3
M(θ)
Y1(θ)
Y2(θ) Y2obs
Y1obs
F2(θ)
F1(θ) +
-
+
-
f1
f2
1
2
f1
f2
Gupta, Sorooshian, Yapo, WRR, 1998
Center for Hydrometeorology and Remote Sensing, University of California, Irvine
1 2
3 4
6
1 2
A
B
4 3
5
Combination
Ro
uti
ng
Runoff
“Semi-distributed” Hydrologic Models
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