4 - Central Institute of Brackishwater Aquaculture

National Workshop-cum-Training on Biointormatico and Information Managamant In Aquaculture
poor atmospheric conditions usually depress NDVI values causing sudden drops
in NDVI which are not compatible with the gradual process of vegetation growth
and is considered as noise. This noise was removed using Fourier Adjusted Sun
Zenith Angle Corrected Interpolated and Reconstructed (FASIR) Technique.
Corrected image was used to retrieve smooth temporal NDVI profile, were
analyzed using ground information and whole area was classified into four
classes of dependins on cropped and fallow lands during kharif and rabi seasons
Figure 9. Stacked SPOT NDVI image showing temporal NDVI profile of a year
for kharif fallow, rabi fallow, kharif flooded and double cropped area.
4.1.4 Targeting for possible interventions to enhance the productivity
Satellite remote sensing along with Geographic Information System helps in
retrieving and integrating various information to make possible decision on
intervention for enhancing productivity at spatio-temporal scale. For example
spatio-temporal pattern of flood and crops in flood plain agro-ecosystem
indirectly gives insight for targeting technologies. As discussed in the previous
sections, remote sensing could be used to know potential flooding areas, its
recession pattern and land availability for cultivation which decides the kind of
cropping pattern practiced in the region.
Many lands having high production potential remains fallow due to late
harvesting of Kharif crop and longer turn around time between two crops in the
system. In upland flood plain areas where risk of flood is minimal and land is
available through out the year, coarse or fine rice crop is taken during Kharif
season. Timely harvest of coarse rice leads to timely sowing of wheat crop. But
the late harvest of fine rice during December results in late planting of wheat
crop, which is not profitable for farmer. Hence, they either prefer to keep the
land fallow or grow vegetable crops in some patches. Land remaining fallow after
harvest of rice in kharif is called rice-fallow. Inventory on rice fallow made by
NRSA and ICRISAT through IRS WiFS data analysis during 1999-2000 revealed
that India alone has 11.65 m.ha, which is 29 % of rice area. Nearly 82 O/O rice
fallows are located in the most flood prone states. The GIs analysis of these