pastas.stats.signatures#
This module contains methods to compute the groundwater signatures.
Functions
Range of unscaled groundwater head. |
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Lag where the first peak in the autocorrelation function occurs after Wang et al. [2006]. |
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Classification according to Martens et al. [2013]. |
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Baseflow index according to Organization [2008]. |
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Baseflow stability after Heudorfer et al. [2019]. |
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Bimodality coefficient after Ellison [1987]. |
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Colwell's predictability, constant, and contingency Colwell [1974]. |
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Colwells constancy index after Colwell [1974]. |
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Colwell's contingency Colwell [1974] |
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Test statistic of the Silverman test, after Silverman [1981]. |
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Coefficient of variation of the date of annual minimum head. |
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Coefficient of Variation in fall rate. |
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Coefficient of variation of mean head over a period (default monthly). |
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Coefficient of Variation in rise rate. |
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Range of the duration curve between the percentile l and u after Richards [1990]. |
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Slope of the duration curve between percentile l and u after Oudin et al. [2010]. |
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Test statistic of the dip test, after Hartigan and Hartigan [1985]. |
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Mean negative head changes from one day to the next. |
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Number of times the series exceeds a certain threshold. |
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Average duration of pulses where the head exceeds a certain threshold. |
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Hurst exponent according to Wang et al. [2006]. |
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Interannual variation after Martens et al. [2013]. |
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Number of times the series drops below a certain threshold. |
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Average duration of pulses where the head is below a certain threshold. |
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The exponential rate of divergence of nearby data points after Hilborn and others [2000]. |
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Difference of peak head to base head, divided by base head after Hannah et al. [2000]. |
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Mean of annual maximum after Clausen and Biggs [2000]. |
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Parde coefficients for each month Pardé [1933]. |
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Parde seasonality according to Pardé [1933]. |
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Difference between peak and base head, standardized by duration of peak after Heudorfer et al. [2019]. |
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Area under peak divided by difference of peak head to peak base after Gaál et al. [2012]. |
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Recession constant after Kirchner [2009]. |
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Recovery constant after Kirchner [2009]. |
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Average annual number of rises and falls in daily head. |
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Coefficient of Variation in annual number of rises and falls. |
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Richards-Baker index according to Baker et al. [2004]. |
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The path length of the time series, standardized by time series length after Baker et al. [2004]. |
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Mean of positive head changes from one day to the next. |
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Method to get many signatures for a time series. |