This package allows to analyze the ground deformation of a region and to compare it with other climatic variables, such as groundwater levels or rainfall. In addition, the inclusion of wavelet tools allows to analyze the main periodicities of the model variables and estimate cause-effect processes.
Many regions worldwide are affected by ground subsidence phenomena. Abusive water withdrawal from aquifers is one the main factors than can lead to this kind of processes. Although ground motion monitoring can be performed with in-situ instruments, one of the most widely used techniques in the last decades is the Advanced Differential Interferometry Synthetic Aperture Radar (A-DInSAR). The A-DInSAR technique consists on the superposition of numerous SAR images of the same region of the Earth, thus obtaining an image of the ground motion occurring between the SAR images acquisitions. Analyzing multiple time series of ground movement in a given region, and comparing them with groundwater level variatons (or other variables), are the manin purposes of the present program.
Released source packages are available on PyPi. You can simply install it as:
pip install wasar
Since geopandas dependencies could cause conflicts with other spatial packages, it's highly recommended to create first a new environment, as well as taking a look at the geopandas installation guidelines.
An optional package must be installed for the use of wavelet analysis. It's rpy2 package, and it can be simply installed via pip:
pip install rpy2
geopandaspandasmatplotlibfolium
We are Miguel González Jiménez and Carolina Guardiola Albert. You can contact us just via GitHub or through our e-mails: miguigonn@gmail.com and c.guardiola@igme.es.
In the example folder you can find several tutorials that will help you to get started with the program. Also, the functions, classes and modules are fully explained in Spanish, so if you have doubts about their behavior, just use the built-in help, the ? mark or the tab button in Jupyter Notebook.
Example: help(wasar.Dataset.find_element) or wasar.Dataset.find_element? or wasar.Dataset.find_element + . + press tab
This project is licensed under the terms of the GNU General Public License v3.0
If you use the program, please cite it as follows:
- González-Jiménez, M. & Guardiola-Albert, C. (XXXX). Wasar: Analysis of A-DInSAR time series. (Version X.X.X). Zenodo. http://doi.org/10.5281/zenodo.6334996
>>> import wasar
>>> Model = wasar.example.get_model()
>>> mymap = Model.mapa(LayerControl=False)
>>> Model.get('Asc').mapa(m=mymap)
A very useful tool of wasar are wavelet tools, which allow to perform frequency analysis of the time series.
The following example shows the common periodicities between a rainfall station and a piezometer, being the annual frequency the main common one.
>>> from wasar import Wavelet
>>> Doñana = wasar.example.get_model()
>>> piezometer = Doñana.get('Piezo_bbdd').take('104080065')
>>> piezometer = piezometer.pivot(index='Fechas',columns='Nombre', values='Valores')
>>> rainfall = Doñana.get('P').take('Almonte')
>>> Wavelet('M', piezometer, rainfall, dt=2, dj=1/20, lowerPeriod=2, upperPeriod=30)
