Problems in the satellite estimation of irrigated area
- Detection of spring supplemental irrigation is difficult.
-- We focus on summer crops.
- Phenology of irrigated crops mimics other landcovers.
-- We use other factors such as terrain to reduce misidentification.
- Broad size distribution of irrigated fields (F(A)=C Am
; m = -1.9 ). Small fields dominate.
-- We combine Landsat and AVHRR data.
- Sensor and orbit drift.
-- We use a desert reference area.
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16 July 1999