hydroengine 0.0.30

Hydro Engine is a small service and a command-line tool built on top of [Google Earth Engine](http://earthengine.google.com) that allows querying various hydrological variables, useful as an input for hydrological models.

[](https://travis-ci.org/openearth/hydro-engine)

The command-line Python tool can be installed using the following commands: ` > pip install hydroengine `

Once the package is installed, you can use `hydroengine` command to download input data needed for your hydrological model.

Upstream catchments, rivers and various raster variables can be queried using following commands:

` > hydroengine region.json --get-catchments catchments.json > hydroengine region.json --get-rivers rivers.json > hydroengine region.json --get-raster dem dem.tif 1000 EPSG:4326 > hydroengine region.json --get-lakes lakes.json > hydroengine region.json --get-lake-variable 183160 water_area area.json `

See [examples/run.sh](https://github.com/Deltares/hydro-engine/blob/master/examples/run.sh), showing how different data types can be downloaded.

All data types can be queried for an input area or location (GeoJSON polygon geometry). A polygon may define a flood location. For example, in the figure below, a single point near Houston is used to query upstream catchments and a drainage network, providing runoff water for that location.

<img src=”https://github.com/Deltares/hydro-engine/blob/master/docs/example_query.png?raw=true” alt=”Example” width=”626” height=”485”>

Supported functionality:

• Querying upstream catchments as a single or multiple polygons. Source: [HydroBASINS](http://www.hydrosheds.org/page/hydrobasins)

• Querying upstream drainage network as polylines. Source: [HydroSHEDS](http://hydrosheds.org)

• Querying raster variables:

  • dem [m] - in meters, source: 30m SRTM v4

  • hand [m] - Height Above the Nearest Drainage ([HAND](http://global-hand.appspot.com))

  • FirstZoneCapacity [-] - ?

  • FirstZoneKsatVer [-] - ?

  • FirstZoneMinCapacity [-] - ?

  • InfiltCapSoil [-] - ?

  • M [-] - ?

  • PathFrac [-] - ?

  • WaterFrac [-] - ?

  • thetaS [-] - ?

  • soil_type [-] - soil type, based on ?

  • landuse [-] - land use type, based on MODIS 500m

  • LAI01…LAI12 - leaf area index monthly climatology, source: [eartH2Observe](http://www.earth2observe.eu/)