Should human be responsible for flooding? Deforestation Deforestation Soil erosion Soil erosion More load More load Silting Silting Reduction in carrying capacity of river Reduction in carrying capacity of river Dyke maintenance leakage + collapse Dyke maintenance leakage + collapse
Why is there deforestation? Careless farming practices Careless farming practices Over-grazing Over-grazing Over-cultivation Over-cultivation Timber production Timber production mining mining
Results of deforestation Reduce rate of infiltration Reduce rate of infiltration Increase surface runoff Increase surface runoff Soil dries out easily Soil dries out easily Soil erosion Soil erosion Deposition takes place Deposition takes place Raise river bed Raise river bed Silting Silting
Conclusion: causes of flooding Physical factors Physical factors Human factors Human factors
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