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iAqueduct Observatories & Data Repository

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iAqueduct Data Repository

To address iAqueduct challenges, Table 1 lists the essential ecohydrological variables and parameters to be obtained or measured directly by means of various techniques from in situ, UAS, airborne, to satellite.

Table 1. Essential variables/parameters measured in iAqueduct observatories.

Variables/Parameters

Targeted Research

In Situ 1

UAS 2

Airborne 3

Satellite Missions 4

Precipitation

Downscaling

X

 

 

X

Air Temperature

 

X

 

 

 

Air Pressure

 

X

 

 

 

Humidity

 

X

 

 

 

Wind speed/direction

 

X

 

 

 

Four-component (and Net) Radiation

 

X

 

 

X5

Soil Heat Flux

 

X

 

 

 

Evaporation/transpiration

Downscaling

 

 

 

X

Runoff

 

X

X

 

 

Stream Flow

 

X

 

 

 

Groundwater level

 

X

 

 

 

Soil Properties (texture, hydraulic, thermal, etc.)

Retrieval

X

X

X

X

Soil Moisture (surface, profile)

Downscaling

X

X

 

X

Soil Temperature (surface, profile)

 

X

X

X

X

Soil Freeze-Thaw (surface, profile)

 

X

X

X

X

Snow Depth

 

X

X

X

X

Snow Water Equivalent

 

 

 

 

X

Land Cover Types

 

X

X

 

X

Vegetation Coverage

 

X

X

X

X

Plantation Structure

 

X

X

 

 

Leaf Area Index

 

X

X

 

X

Vegetation Structure Parameters (density, canopy height, crown diameter, etc.)

 

X

X

 

X

Biomass (NPP and NEE)

 

X

X

X

X

DEM

 

 

X

 

X

Laser altimetry

 

 

X

 

X

Reflectance (optical range)

Energy balance and vegetation dynamics

X

X

X

X

Fluorescence (optical range)

 

 

X

 

X

Emittance (thermal range)

Energy balance and temperature downscaling

X

X

X

X

Brightness temperature (microwave range)

Soil moisture downscaling

 

 

X

X

Backscattering coefficient (microwave range)

Soil moisture downscaling

 

 

 

X

1 In Situ spatial resolution: 1cm to 5cm; temporal resolution: seconds to minutes, hours, and days. 2 UAS spatial resolution: 5cm to 15cm; temporal resolution: hours to days. 3 Airborne spatial resolution: 15cm −10m; temporal resolution: hours to days. 4 Satellite spatial resolution: 10 m–25 km; temporal resolution: days to weeks.5 Only Albedo, Land Surface Temperature