Socio-economic aspects and impact of land use change on sediment production dynamics in the northeastern region of India

Abstract

The northeastern region of India, with an area of 255 090 km[sup]2[/sup], is predominantly hilly. Major socio-economic factors affecting sediment production in the region are; shifting cultivation, land tenure system, fast growing population, small landholdings, deforestation and free range grazing. A multi-disciplinary longterm study showed that 92.9 to 99.1% of rainwater can be retained in-situ, compared to 66.3% in shifting cultivation. Mean annual soil loss varied from 11.2 to 97.2 t km[sup]–2[/sup] in new land use systems as against 3621.3 t km[sup]–2[/sup] in shifting cultivation. The sediment load per litre of runoff from watersheds varied from 1250–20,300 mg suspended sediment, 5.4 to 23.6 mg NO[sub]3[/sub] – N, 2.3 to 6.5 mg P–PO[sub]4[/sub], 17.2 to 35.8 mg K[sub]2[/sub]O, 0.4 to 1.8 mg Zn, 0.9 to 2.7 mg Mn, 6.5 to 12.0 mg Mg, 7.1 to 18.4 mg Fe and 4.0 to 7.2 mg SO[sub]4[/sub]. The sediment transport from the catchments showed spatial and temporal variations.

Authors and Affiliations

U. SHARMA, VIKAS SHARMA

Keywords

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  • EP ID EP149996
  • DOI -
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How To Cite

U. SHARMA, VIKAS SHARMA (2010). Socio-economic aspects and impact of land use change on sediment production dynamics in the northeastern region of India. Annals of Warsaw University of Life Sciences – SGGW. Land Reclamation, 42(1), 209-217. https://europub.co.uk./articles/-A-149996