Remote Sensing Analysis of Crop Water Use in the Macalister Irrigation District
نویسندگان
چکیده
Irrigation has a significant impact on regional water resources in south-eastern Australia. It is therefore important that objective assessments of the current use of water are undertaken on a routine basis. New remote sensing technologies now provide an opportunity to assess and monitor water use at farm and regional scales. This study demonstrates the use of satellite-based estimates of evapotranspiration (ET) and NDVI (Normalised Difference Vegetation Index) in irrigation performance indicators that relate crop water use to crop water requirement (CWR) in the Macalister Irrigation District of south-eastern Australia. The METRIC energy balance algorithm (Allen et al 2007) was used to derive ET estimates from Landsat 7 ETM+ data. ASTER imagery was used to complement the spatial coverage of the Landsat 7 imagery due to the gaps in the scene acquired.
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