The probable impacts of climate change on poverty - UNDP

Reduction <strong>of</strong> crop yield by gradual <strong>change</strong> and total or partial damage due to extreme events are key <strong>impacts</strong>
facing by crop agriculture sector. In addition to direct <strong>climate</strong> and <strong>climate</strong> related disaster, other key factors <strong>of</strong>
yield reduction are degradation <strong>of</strong> soil health by sand deposition and erosion <strong>of</strong> cultivable land. <strong>The</strong> following
table provides several stress factors identified by the experts and <strong>probable</strong> yield reduction. It is also to be noted
that most <strong>of</strong> the crops are affected at flowering to grain-filling stage and thus <strong>impacts</strong> vary by agro-ecological
zone.
Table 6.3 Perception <strong>of</strong> Present Level <strong>of</strong> Impacts related to Climate Change on Crop Agriculture in the
Flood and Flash Flood Affected Areas
Major Changes and Impacts
<strong>The</strong> Probable Impacts <strong>of</strong> Climate Change on Poverty and Economic Growth and
the Options <strong>of</strong> Coping with adverse Effect <strong>of</strong> Climate Change in Bangladesh
Crop loss/yield
reduction (%)
• Soil quality degradation by sand deposition due to bank erosion 10
Improve soil health by deposition <strong>of</strong> silts and SOM 20
Changes in flooding characteristics (increased frequency, severity, duration
and extent)
Changes in crops/cropping patterns with new varieties 15 (incr ease)
Damage <strong>of</strong> Aus, Aman by riverine flood and river bank erosion 30
Damage <strong>of</strong> Boro Rice by flash flood in basin areas 40
Delay sowing <strong>of</strong> pulses and vegetables 30
Increase waterlogged area 20
River bank erosion causing decrease <strong>of</strong> cultivable land 20
Increasing incidence <strong>of</strong> pests and diseases 10
Source: Key experts interviews and workshop for MDG-GED project, 2008
Table 6.4 Perception <strong>of</strong> Present Level <strong>of</strong> Impacts related to Climate Change on Crop Agriculture in the
Drought Affected Areas
Major Changes and Impacts
Crop loss/yield
reduction (%)
Decreasing soil moisture that affect crop production systems 20
Changes in drought characteristics (time/duration, severity and extent) 20
Degradation <strong>of</strong> soil physical properties due to depletion <strong>of</strong> SOM and
decrease <strong>of</strong> microbial population
20
Increasing soil-related constraints (viz.swelling/cracking clays,
P-fixation, micro-nutrient deficiencies <strong>of</strong> Zn, B and Mo)
25
Cultivable paddy land is transferring to high value crops especially in
Barind areas
15
Changes in crops/cropping pattern with new varieties 10 (increase)
Aman crop is affected by drought 30
30
43