raster-based streamflow analysis - conditions map 2005. 3. 25.¢  raster-based streamflow...

Download Raster-based Streamflow Analysis - Conditions Map 2005. 3. 25.¢  Raster-based Streamflow Analysis Richard

Post on 06-Sep-2020

1 views

Category:

Documents

0 download

Embed Size (px)

TRANSCRIPT

  • RasterRaster--based based Streamflow Streamflow

    AnalysisAnalysis

    Richard B. Koehler, Ph.D.Richard B. Koehler, Ph.D. National Weather Service/NOAANational Weather Service/NOAA

    Boulder, COBoulder, CO

  • BackgroundBackground

    Streamflow patterns Streamflow patterns Occur on different timescalesOccur on different timescales Include flow volume and timing Include flow volume and timing Show cumulative effect of disturbancesShow cumulative effect of disturbances

    Multiple existing methods (170+ indices)Multiple existing methods (170+ indices) Many correlated or redundantMany correlated or redundant Adequate for volume (composition)Adequate for volume (composition) Weak for timing (configuration)Weak for timing (configuration)

    Large daily datasets existLarge daily datasets exist

  • Study sitesStudy sites

    Snake River at Irwin, ID at Heise, ID

    San Miguel River at Placerville, CO

    (CONTROL)

    Colorado River at Lees Ferry, AZ

    Palisades Res, WY

  • Year 1984

    Day 329 330 331

    ... 1985

    329 330 331

    ... 1986

    329 330 331

    1 yr 1 yr

    Year

    1986

    1985

    1984

    Day 329 330 331

    Short-term timescale "i" (daily)

    Long-term timescale

    "j" (yearly)

    Raster gridded time seriesRaster gridded time series

  • Colorado River exampleColorado River example Colorado River at Lees Ferry, AZ linear hydrographColorado River at Lees Ferry, AZ linear hydrograph

    10

    100

    1000

    10000

    Oct- 1921

    Oct- 1931

    Oct- 1941

    Oct- 1951

    Oct- 1961

    Oct- 1971

    Oct- 1981

    Oct- 1991

    Oct- 2001

    Date

    Fl ow

    (c m

    s)

    1

    2

    3

    4 5

  • Colorado River exampleColorado River example Colorado River at Lees Ferry, AZ raster hydrographColorado River at Lees Ferry, AZ raster hydrograph

    30 60 90 120 150 180 210 240 270 300 330 360

    Day of Water Year

    1930

    1940

    1950

    1960

    1970

    1980

    1990

    2000

    W at

    er Y

    ea r

    100

    1000

    Flow (cms)

    2.00

    3.00

    11

    22

    3

    4

    5

  • Autocorrelation Autocorrelation Linear vs. gridLinear vs. grid--based lag schemebased lag scheme

    ∆t = 1 day lag

    Comparison cells

    ∆t = 1 day lag ∆t = 1 year lag ∆t = 1 year and 1 day lag

  • CorrelogramsCorrelograms

    San Pedro River at San Pedro River at Charleston, AZCharleston, AZ

    1936 1936 -- 20012001

    -0.2 -0.1 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

    0 30 60 90 120 150 180 210 240 270 300 330 360 Lag, k (days)

    C or

    re la

    tio n,

    r( k)

    DailyDaily

    YearlyYearly

    0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

    0 1 2 3 4 5 6 7 8 9 10 Lag, k (years)

    C or

    re la

    tio n,

    r( k)

  • CorrelogramsCorrelograms r(ki,kj) =

    var (unshifted cells) covar (shifted cells)

    2

    1

    Ye ar

    ly la

    g (j

    )

    -1

    -2

    -2 -1 0 1 2

    Daily lag (i)

    0

    1 r(k)

    0

    1

    Daily Lags

    0

    1 r(

    k)

    01

    Y ea

    rly L

    ag s

    0

  • Artificial flow examplesArtificial flow examples Random yearly flowRandom daily flow

    30 60 90 120 150 180 210 240 270 300 330 360

    "Day"

    1900

    1920

    1940

    1960

    1980

    "Y ea

    r"

    0.1

    0.2

    0.3

    0.4

    0.5

    0.6

    0.7

    0.8

    0.9

    "Flow"

    30 60 90 120 150 180 210 240 270 300 330 360

    "Day"

    1900

    1920

    1940

    1960

    1980

    "Y ea

    r"

    0.1

    0.2

    0.3

    0.4

    0.5

    0.6

    0.7

    0.8

    0.9

    "Flow"

    -150 -100 -50 0 50 100 150

    Lag in "days"

    -40

    -20

    0

    20

    40

    La g

    in "y

    ea rs

    "

    -0.25

    0.00

    0.25

    0.50

    0.75

    1.00 Correlation

    -150 -100 -50 0 50 100 150

    Lag in "days"

    -40

    -20

    0

    20

    40

    La g

    in "y

    ea rs

    "

    -0.25

    0.00

    0.25

    0.50

    0.75

    1.00 Correlation

  • Artificial flow examples, part 2Artificial flow examples, part 2 Random fluctuating daily flowExactly identical increasing yearly flow

    50 100 150 200 250 300 350

    "Day"

    1900

    1920

    1940

    1960

    1980

    "Y ea

    r"

    0.1

    0.2

    0.3

    0.4

    0.5

    0.6

    0.7

    0.8

    0.9

    1.0 "Flow""Flow"

    30 60 90 120 150 180 210 240 270 300 330 360

    "Days"

    1900

    1920

    1940

    1960

    1980

    "Y ea

    rs "

    0.10

    0.20

    0.30

    0.40

    0.50

    0.60

    0.70

    0.80

    0.90

    "Flow"

    30 60 90 120 150 180 210 240 270 300 330 360

    "Days"

    1900

    1920

    1940

    1960

    1980

    "Y ea

    rs "

    0.10

    0.20

    0.30

    0.40

    0.50

    0.60

    0.70

    0.80

    0.90

    -150 -100 -50 0 50 100 150

    Lag in "days"

    -40

    -20

    0

    20

    40

    La g

    in "y

    ea rs

    "

    Correlation

    -0.25

    0.00

    0.25

    0.50

    0.75

    1.00

    -150 -100 -50 0 50 100 150

    Lag in "days"

    -40

    -20

    0

    20

    40 La

    g in

    " ye

    ar s"

    -0.25

    0.00

    0.25

    0.50

    0.75

    1.00

    Correlation

  • 30 60 90 120 150 180 210 240 270 300 330 360

    Day of Water Year

    1950

    1960

    1970

    1980

    1990

    2000

    W at

    er Y

    ea r

    0. 0

    1. 0

    1

    10

    Flow (cms)

    ResultsResults San Miguel River San Miguel River at Placerville, COat Placerville, CO

    Control site for Control site for Upper Colorado Upper Colorado River Basin

    Raster hydrographRaster hydrograph River Basin

    Grid correlogramGrid correlogram

    -150 -100 -50 0 50 100 150

    Lag in days

    -30

    -20

    -10

    0

    10

    20

    30 La

    g in

    y ea

    rs

    -0 .25

    0.00

    0.25

    0.50

    0.75

    1.00

    Correlation

  • 1000

    10000

    100000

    30 60 90 120 150 180 210 240 270 300 330 360

    Day of Water Year

    1960 1965 1970 1975 1980 1985 1990 1995 2000

    W at

    er Y

    ea r

    3.00

    3.50

    4.00

    4.50

    Flow (cms)

    ResultsResults

    Palisades Palisades ReservoirReservoir

    End of month End of month storage converted storage converted to streamflow

    Raster hydrographRaster hydrograph to streamflow

    Grid correlogramGrid correlogram

    -150 -100 -50 0 50 100 150

    Lag in days

    -20

    -10

    0

    10

    20 La

    g in

    y ea

    rs

    -0 .25

    0.00

    0.25

    0.50

    0.75

    1.00

    Correlation

  • 10

    100

    1000

    30 60 90 120 150 180 210 240 270 300 330 360 Day of Water Year

    1920

    1930

    1940

    1950

    1960

    1970

    1980

    1990

    2000

    W at

    er Y

    ea r

    Flow (cms)

    Raster hydrographRaster hydrograph

    ResultsResults Snake River at Snake River at Heise, IDHeise, ID

    Downstream from Downstream from Palisades ReservoirPalisades Reservoir

    -150 -100 -50 0 50 100 150

    Lag in days

    -20

    -10

    0

    10

    20

    La g

    in y

    ea rs

    -0.25

    0.00

    0.25

    0.50

    0.75

    1.00

    Correlation

    (1960 through 2000)(1960 through 2000)

    -150 -100 -50 0 50 100 150

    Lag in Days

    -20

    -10

    0

    10

    20

    La g

    in y

    ea rs

    Correlation

    -0.25

    0.00

    0.25

    0.50

    0.75

    1.00

    (1911 through 1951)(1911 through 1951) Grid correlogramsGrid correlograms

  • 10

    100

    1000

    30 60 90 120 150 180 210 240 270 300 330 360

    Day of Water Year

    1960

    1970

    1980

    1990

    2000

    W at

    er Y

    ea r

    1

    2

    3

    Flow (cms)

    -150 -100 -50 0 50 100 150

    Lag in days

    -20

    -10

    0

    10

    20

    La g

    in y

    ea rs

    -0.25

    0.00

    0.25

    0.50

    0.75

    1.00

    Correlation

    Raster hydrographRaster hydrograph Grid correlogramGrid correlogram

    ResultsResults

    Snake River at Snake River at Irwin, IDIrwin, ID

    1956 1956 -- 20022002

    Observed Observed hydrograph and

View more >